113°00' 3 0000m 112°00' R 10 W 3 E 1 600 1 600 00 FEET (SOUTH) R 9 W 34 3 3 3 4 R 21/2 W 1 850 000 FEET (CENTRAL) R 2 W 39°00' 1 625 1 625 45' R 8 W 1 650 1 675 1 675 R 7 W 6 1 700 1 700 R 6 W 30' 1 725 1 725 R 5 W 8 1 750 R 4 W 1 775 9 15' 1 800 1 800 R 3 W 0 1 825 1 825 39°00' -Cpm -Cdh 16 -Cdh Qaf2 QTaf Tf 55 Tf Qlg -Cp Tf Qdg Qdg Tht Qgt Tg 12 Qaf P Toc QTaf 1 -Cdh QTlf Qlf P - Qac 850 000 Qaf1 Qlg Qlg/Toc Toc Cum Kc Qal1 B -Cp -Cpm Qls Qgt FEET -Cpm 12 12 Qal1 Qac Qac Qgt Qac Tf Tse Tg Qaf2 - Qaf2 -Cop 18 -Cpm Cp Tf (SOUTH) Qla - Qla Jn TKn Cp Tf B Toc -Cpm 8 Qaf2 Tg -Cdh -Cdh QTlf Qdg Qlg -Cum 10 Qaf2 - Qaf2 QTaf - Cdh Toc TKn Tse Cpm -Cpm - -Cpm -Cdh Qdg Qed/Qvb3 Toc Qgt Qac Qac -Cpm Cp Tf QTlf Qla Qed/Qlf Qaf2 Toc -Cop Qed Qvb Qac B 1 Qac QTaf Qaf2 T 21 S -Cdh Toc Qaf2 QTaf QTaf -Cp 25 -Ccm Tf -Cdh TKn Qgt Qaf2 -Cp P -Cum Qal QTaf - -Cp QTlf Qac 1 B Cpm Toc Tg Tg Tflr Qaf2 T 21 S -Cdh -Cw Qed Qlf Qlg Qlg - 72 Tflr Qaf2 -Cp 12 Qla P Cum - - - -Cdh Qlf Qdg Qla Qmu Ct Cop Qac Tg Cw -Cp Tf Qaf1 Tflw - Tg Cp 11 -Cdh Tflr - -Cp TRm Qac Qac Cpm Qlg 5 -Ct Kc Qlg Qlf Toc Qaf 30 Tflr Tflw QTaf -Ccm 14 Qed/Qvb 2 - -Cdh QTlf 1 Toc TRcu Qac 10 Qac Cw B B Tht 20 TRcs 35 Qaf2 Tg 20 Qaf2 Qvb1 Kc 5 - Qlf/Qvb2 Qpm Tflr Tg Cdh - Qlg Qdf 30 Jn Qac QTaf -Cpm Cdh P -Cdh Qac -Cum TKn Qaf Qla P 20 Qaf2 1 - 18 Qed Qlg TRcu Tflr -Cpm Cdh Qed/Qlg Qed/Qlf Qed/ -Cum Qac 225 000 - -Ccm Qaf2 TRcs Qaf Cdh Qlf/ Tflr FEET 2 24 -Cw -Ccm Qed/Qll -Ccm QTlf Qed/ Qvb4 Qal2 30 Qac Qac -Cdh Qla Qed/Qvb1 Toc Tflw Tg (CENTRAL) Qdg Ktm 5 Qll Toc TRm Qac TKn Tg Qal B Qac -Cp 16 -Cwt B Qlg Qdf 1 10 225 -Cdh Qla P -Ct Tg Qaf2 Qlg Qed/Qlf/Qvb4 Toc Toc Ktm Tg 26 -Ccm Qal1 Qpm Tflr -Cp -Cdh -Ccm Qac Ktm -Cop Qac -Cdh -Ccm Qed Tg Qdg TRcs -Cpm -Cdh Qls TKn 431 -Cp Qll Qlg Qdg Toc Qac Tfmr Tfmr Qaf2 Tbr Qla Qdf TRcu Tflw Tg Qms P P Tflr Qac 825 -Cpm -Ccm P T Tflw Qaf2 Tg Qac Tbr Tbr Qed/Qlf Qac 60 Tflr Tg Tf Qed/Qlg S TKn TKn Qal1 -Cdh 26 -Cdh Tflw Tflr Qaf2 Tch -Cdh -Ccm Qaf1 Qed/Qlf/Qvb4 - Qed P Ct Tfmr Qac QTaf 43 0000m - - -Cw Qal1 P Qlf Qaf2 Toc THRU - 4 Tf 1 N Cdh Cp B P Qal1 Cum Tflr Tflr Qaf2 P Qlg -Ct -Ct -Ccm -Ccm Tbr 20 TRcu Qac Tfmr Tg Tf - Tflr Qaf2 QTaf 17 -Ccm Cwt Qlf Qlf Qdf Qac 30 QTaf Tch 12 17 P - TKn - -Ct Tflr - Qlg -Cum Cum Ct Tfmr Tg 10 Tf Cdh -Cdh Qlf Qdg Qed/ Qlf A - -Ct 40 Kc TKn Qac - Tbr - Qvr4 Cum TKn 45 Tflw Qaf Cw 18 -Cwt Cwt QTlf Qdg TKn -Cop 2 Qac Tg Qvb2 P Qla -Cop TRcs -Cop Qaf2 Tf -Ccm -Cwt P Toc Jn Qac - -Ccm -Cum -Cum Cdh Tbr Qlf Qvb2 Qlf Tfmr QTaf Tf B P -Ct Tch - -Cwt Qlf Qac Tfmr Tg Tf Cdh -Cw Qaf1 QTlf Qlf/Qvb4 B -Cop Ktm Kc Qmu TKn Tfmr -Cob Qed/Qlf/Qva5 P Qed -Cum TRcu 70 QTaf -Ccm 16 P Jn Tflw Tf 9 -Ccm Qlg - TRm Dc TRcs -Cum Qac Qac Tch 20 Qed/Qlf Ct 45 30 9 Pk TRm 30 TKn -Cw - - Qaf1 Qlf Qac Tfmw Tfmr Tfmr Tg Qaf2 -Cw Tf Cwt Cwt Pk Qac Tfmr Qaf2 20 QTlf Qed TRcs Tflw 18 -Cwt P TRcu -Cum Tflr Tf -Ccm Tf 2 -Cum Tfmr Tfmw Tflw Tfmr Tg QTaf 22 -Cwt B QTlf Ppk TRcs Qac Qac Tflw Tg Tf Qlf P TRcu 43 Kc Tflw -Ccm Qdf Qlf/ P Qed -Cop 5 Tfmr Qms Tfmr -Ccm -Cob P IPc T 22 S -Cdh - -Cou Qlf Qvb4 Jn Kc Qaf2 -Cdh Cob -Cwt Qed Ppk TRcu Tf Qla Qlf TRm Jn Tflw Qms Qdf Qlf/Qva B Pk Jn - -Cw 20 Qaf - Qaf1 5 P Mr Jn Cum Tflw -Cw -Cwt 2 Cwt Qed/Qlg Qlf Qaf1 45 40 8 -Cum TKn (Tg) Tg Tf - Qlf/Qvb TRm Tflw Cwt Qlg Qed/Qdg 4 IPc Qac Qac Tfmr Tfmw Tfmw Tfmr 30 -Cou Qdf Qlg Mr 75 - -Cwt P TRcs Kc Cdh -Ccm -Cob 2 B Qla Qed Ppk 4 TKn Tfmw Tflw 200 Qed TRm TRcs Qmt Tch Qaf -Cob TRcu Tfmr Tf 2 17 15 5 Qaf 12 P IPc TRm 60-1 2 Qlf/Qvb4 TRm Tfmr Tg T 22 S -Cob Qlm 50 Jn Qms TKn Tflw Qac 12 Qlg Pk TRcu Qaf2 Tf Qal1 Qed TRcu Qgt Tflw 200 -Ccm Qed/Qlf/Qva5 (Jn, TRcu) Qgt Tfmw Tfmr Tflr 3 6 Qla Jn 7 -Cwt - B Qla Qlg 82-1 Qed Qlf Qms Tch - Cwt 30 - Qdg Qdf Qpm Qla Qmt -Ct Tf Ccm Cob P Qed Qlg Qlf R Qgt 8 19 6 Qed/Qlf Qaf Qmt (T cu) Tflr Qac 8 Qmt 5 Tg Tf Qla P 2 Tflw 16 -Cwt 5 B Tfmr 5 Tflr 10 7 Qlf Tflr Qaf2 Tf -Ccm -Cwt 81-4 P Qmt - -Cwt Qlg Qlg Qms Jn - 25 800 -Cp Cwt Qlf Jn Qmu Cop Qac P Tfmw Tch Tf -Cwt -Cwt (Jn,TRcu) Qgt 7 Tflr -Cwt Qlg Tfmw Tg Tac 30 -Cob Qaf Qlf/ Qvb4 Pk -Cp Tf 12 2 Qdg ? Qal1 Qla Qac Tg -Ccm 15 -Cob - Qaf1 P Qlf Qaf 4 Tfmr Cwt Qlf Qvb4 1 TRm Tfmr 800 - B Tfur Tau -Cw - Cob -Cwt Qed Tflr Tg - Cob 15 Qst Tfuw Tdvt Tf Ccm 17 -Cob Qaf2 Jn Qmt -Cum Tfuw -Cdh Tf Toc Qmu 10 Tg Tg 11 Qaf2 QTlf Qdf Qac Tfur Tfur Tac P Qlf/Qva5 25 Tfmw 8 Tfmw Tg Qmt -Cp P - 9 Tac Tf Tf Tf -Cwt B Pk Ct Qms 11 Qvb -Cum Qaf2 ONE 43 -Cp Qaf2 Tbr 4 Qst Qmt Tfmr Tfuw Tg Z 0 -Cob -Cob Ktm 8 Tch Qac -Cwt - TRm Ktm 80 4 Cwt Qlf P Tflw 21 22 -Cob -Cou - Tfmr Tfmr Tac Tf Cwt B Qac Qmt Tfmr Qla ? P 31 -Ccm -Cob 9 Qla ? Qaf2 O-Cn Qaf2 Qlf -Cop Qac Tfmr Tg P Qla TRm 8 Tfuw E 28 -Cwt 20 - Qal1 Qlf Qlf Qac Tbr Cwt 48 Tfmr Qmt -Cw Tbr ? Pk 5 Tfur Tac 430 17 Qls 8 20 E' Qed 30 Tfmw Tfur Tg 21 Tbr - P Qal2 Qaf2 Tbr Cob Qlf Qal1 B Pk R Tfmr Tfmr Qac -Ccm Tbr 10 Qaf2 Qlg Qlg Qlf T cs Qaf2 P TRm Qmt Qmt Qaf1 26 B Qlf/ Qmt 15 Qmt Tbr Tbr Qlg P Toc? Tfur Tfmr 9 Tg Tfur - -Cwt - Qlg Qvb4 20 Cwt Cwt Cwt Qla Qlf Qaf1 TRcu Qaf - Tbr 23 B Qdg Qac Tfmw 7 Qac Qmt 2 Cp Jn Tfmw Tbr B Qlg Tcr Tg 15 Tbr Qaf1 TRm Tflw Tfuw Tch Qaf2 Tbr TRcs Tfmr Qac Tfmw Qvb4 ANT Tfur Tg -Ccm -Cw Tbr Qla V Qms Tfur Tbr Qlg Tcr A Tfmr B QTlf Qlg Qac Tfmw Qla P A' 14 P Pk 47 25 Tfur Tg 175 - Tbr Tcr Qlf P Qla Cw Tbr -Cwt Qaf Qaf2 Toc? Jn 1 Qla B Qac Tbr Qal1 QTlf Toc Qmt Tfuw Qaf2 Qaf Pk TRcs 10 10 Qms 2 Qaf1 Tcr Qlg Qal2 B Qmt Qac 7 QTlf Qlf Qlf Qvb4 Tfmw -Cdh Qlg Qls TRcu -Ct Tfur 175 Tbr Jn Tg -Cdh Tbr Qlg Tfuw Qms 26 15 Qls Qla Pk 7 Tfuw T 23 S Qla Tcr Ttl Qac Qac Qlm Tcr Qls Ttl Qlg Pk R Pk Qaf2 Tbr Qaf2 Qlf Qaf1 T m Tfur Qms 11 Tcr P Qvb4 Qal1 Tbr B Tcr Qlg Ttl P Mr Tfur (Tg) -Cp QTlf Tcr Tcr Ktm Tfmr Tfmr Tfmw Qms -Cw -Ccm Qlg Qaf1 Qvb Qlg TRm Mr Tfmr QTaf Qla 4 Pk TRm Qac Tfmr -Cp Tbr Qaf Qmt 775 24 Tbr Qlg Tcr 2 Qla/ Qvb4 B Mr Jn Tfmr 6 Qmt Tfuw T Tcr Qlm Qls Toc Qaf1 TRm Jn 15 Tfmw 7 Tfmr Tfmr L Qaf2 Trt Qvb4 - 10 Tfur Qmu T 23 S -Cdh -Ccm Qlg Qls Qlg Qlm Mr Cum Tfur Tfuw AU Qaf1 B QTlf Qls Qal2 Mr 30 20 Tfmw Tfuw F Qaf Ttl B Ttl Qls Qaf1 Pk 5 Qac 775 - 15 Tbr Tbr Tbr Qaf1 1 P Qlg Qac Tfmw Tfur Tch Qaf1 Cp Qal1 Qlg Qmu Tflr Tg Tfuw Qms Qal1 14 B QTlf Qlg Qlg P Qvb4 Pk Qac 10 8 Tg Qms (Tch) Tcr B Qlg Toc Qla Pk Pk -Ct Tfuw Toc Qac Tfmw Tg Qms Qms (Tg) QTlf Qlg Tcr B Qlg Trt Qaf Qla Qlg B Pq Qmu Qmt 10 Tg 2 Tlr Qlg Qaf Qla Qac Tfur 10 Qms (Tch) Tf Qal1 Tcr 1 Qlg 5 Tfmw Qms Tch -Cw Qll C Tg Tg Qms (Tch) Qms 18 Qaf1 QTlf Tcr Ttl Qvb4 Qlg -Cop Tfuw Tbr Ttl Qlg -Cum Qmu Tfur 10 Qms (Tg) Qlg B Qls Qla -Ct Qla Qlg Qlg Qmt 25 Tfur Qms Tf Tf QTlf Qla Qlf Qlg Tcr Tcr Qal -Ct Qla Tg (Tch) Tbr Qlm Qlg 2 Qlg -Cop Qla Qaf2 Tfmr Tch Qms B B -Cum Tf Qaf2 Tcc Ttl B Qmu Qms (Tg) Qla Qla Qlg Qls Qlg - -Cop Tau 7 Qlg Ct B 23 -Ct Tfmw Tch Tg Tg Tau Qla B Toc 23 20 Qac Tfur To Qms (Tch) Tac -Cw QTlf Qlf Qaf1 Toc Qla Qaf2 -Ct Toc Qmt Tch Tch Qlf Qla Qlm Qed - -Cop Tau Tdvt Qlf Qls Qlg - - Ct Tfur Tg 10 Qms (Tg) Qlg Qlg Qla Ct Toc Ct Qaf2 Qmt 9 9 Qaf2 B Tf Qlg -Cum Qaf2 10 Tfur Tfmw Tch Tau Qaf1 Qls Qlg Qal1 Qlg -Cum Qaf2 Tau Tau 11 Trt Qla -Cum B -Ct - Qms 6 QTlf B Cop - - -Ct Qmt Tfmw Tfuw Tfuw B Qaf2 Tf Qlf B Ttl B -Cum Qaf2 Cop Ct -Ct Pq Mr Qmu Tfur 12 Tau Qlg Op Tfur Tfuw Tfur Tch Qms Qlg Qlg Ttl -Cum Kc Qmu Qac Tbr Qla Qlg B -Cop Qaf2 Toc Jn Tch Pk Jn Tfmr Tac 42 Tcr Ttl Qlg -Ct 25 30 Oe Toc -Cum Pq Qac Tfur Qms Qaf1 Tcp 9 Qlg B Qlg Qst - Oe Tfmw Qac Tac QTlf Qlg Qaf2 Tcc Qls -Ct Cop 30 Ppk Qmu -Cox Tg 11 Tfur Qms 10 20 Ttl Ttl B Ttl Oe Tfur Tfmw Tch Tdvt Qaf1 B B Ttl Toc -Ct IPc (Tac, Qlf Tcr Qla Ttl Mr Qac -Ca Oe Tfmr Tfuw Tch Tg 14 Tbct Qac Tbct 45' -Cwt Toc Toc Op SOu SOu Dc Pk TRcs 46 Jn -Cum Tfur Tbct) 45' Tcr Qlg Toc -Ct -Ct Kc - 25 Tfur Tau Tfur Tfuw Qac Tsg QTlf Tcc Qlg -Ct Ct TRcs Qac 6 Op SOu Qms Tau Tcp Tac Tov Ccm B Ttl Toc SOu Pk Jn Tflw Tau Tau Tg Tcp Qls Qaf2 B Qaf - Ds 20 Mr Jn B 1 Cum SOu Dsy Mr Jn -Cox Tflr Qac Tfur Qms (Tac,Tbct) Qal1 150 42 Trt Tcr Qaf2 Toc -Ct Tbct Tac Tbct 9 QTlf 15 Tcr Ttl Toc 28 30 Ppk TRm Pq TRcs -Ca Qaf Tcc B Toc TRm TRm50 1 Qmu Tcr Qms (Tcc,Ttl) Oe -Cum IPc Mr Tac Tbct Qac Qac Qmt Tac Tcp QTlf Qls Qlg Qlg Qaf Ppk Mr 30 Jn Tflw Tfur Tau Qla 1 20 Dg Tau Tfuw Tac Tau Tac Tda Tcc Ttl Ttl Tcc Toc Qla Toc Op SOu Pq Mr -Cop 16 Oe 5 Tbct 150 QTlf Ttl Ttl Tcc Ttl Qal1 SOu Dsy Qal2 Tf Qms Jn Qac Tac Qms Tac Tcc Qaf1 Toc 25 IPc Jn Qms Op Qac 10 Qac Qmu Tcr Qaf2 Tcc Toc -Ct Ds - 45 Tfmw Qac (Tac, Tbct Tac Ttl Qal1 Qaf Qms Cum TRm Tf Tfuw Qac Tcc Qms 2 Dc Pq Qms Qac Tbct) Tsg Qaf1 B Dg Qal1 TRm Tcc Qms Ttl Qmu Qal2 TRcu Qms Oe SOu Tda QTlf Ttl Tcc Toc SOu Dg Dg 35 TRm Tac Qaf1 Qmu Ttl (Tcc,Ttl) Tcc B SOu Dsy Pk TRcs (Jn) Op Tbct Ds 20 55 TRcu 5 Tac Tau Tac Qmu Qaf2 Toc Toc Dc Qms Tdv TRcs Tf Tac Tau Tcc Qms Mr R Tbm Dc R Tau Qms (T) Qmu 750 Ttl Tcr B Dc Dc TRm T cs Jn Tf Jn Tfmw Tdvt Qac Tbct Tau Tbct Qaf1 Tsg Qal1 Qaf2 Tcc Toc Dsy TRcs Tac Tau Ttl Tcc (Tcc,Ttl) OpOe Ds Dg 10 25 40 Qms (TRcu) Tf Tfur Tbct Tov Qlf/Qvb Ttl Ttl Toc Pk 60 TRm Tf Tau E Tda Qal1 5 Qaf1 Dc Tf Tau 30 Tcc Dc Qmu TRcs Tau Qms Tac Qlf Qal2 Tcc Toc Qaf Ds 25 5 Qac Qac To Tcp 750 1 TRcu Tf Tau Qac Tau OR Qlf Tcc SOu Dsy 24 Qac Tac Tsg Toc Toc Dg Dc IPc Tdv Tf Tac Tac IN Qaf2 Qms (Tcc,Ttl) Dc 10 15 30 Tau Qms TRm 20 Tau Tac S To T 24 S Tcc Ttl Toc 40 Qmu Tf Qac Qac Tbct Qac L Tsg Ttl Dg T Qac Tau Qms (Tac) E Tsg B Op Toc Qms Qmu Tdvt Tse Tcr Toc 28 Qac Qac Qac Qaf2 Ttl Qac Dc Ppk Tau Pk Qac Tcc Ttl IPc Qac RUS Tdt Tau Qms Tbct Tbct Tbct Qla Qac Qac Ttl Toc 20 Tdv Tdv Qac Tac Tse Tcc Toc SOu Mr TH Qms Qac Ttl Qac Tcc Op Ds 14 Tac Tac T 24 S Tcc SOu Pq Tdt Tf 20 Tac Tsg Qac Tcr Ttl Toc 20 TRm Qms Qac Tau Tbct Qac Tac Qaf2 Ttl Tcc -Ca Qac Pk Tdt Tau Tbct Tsg Qaf1 Op Dsy Pk Qac Tau Tdv Qms Tbct Tcr Tcc D Oe Oe Tf TRm Qvb Ttl Tcc IPc TRcs Tf (Tdv) Tac Qms Qms 5 Ttl Dsy 25 35 Tdv Tau Tac Tac Qaf2 Ttl 20 50 Tf Tau Tac Tba Qlf Tcc Qac Toc Op Oe SOu 45 TRm Tau Qms Tb 65 Ds Ppk Jn Tdt Qms Qed B Dsy Dsy TRcs RIDGE Tdt Tac Tcc Qac Qaf 55 40 Tw Qms Qms Tbct Qaf1 2 Ttl 40 TRcu Pk TRm Tf Tdt Tw Tw Qms (Tbct) Tac Dg Mr Pq Jn Tdt Tbct Tac Tsg Tbm Dg 78-2 Dg 50 45 Tau (Tdv) Tse Tse Tcc Toc Oe Dsy Qms Qms Qms SOu TRm Tf Tbct Tbct To Tbct Op 40 (Tdv) (Tdv) Tbct B' Tac Tac Tsg Qaf2/Qvb5 5 Tcc Ttl Qal1 60 Qac Qac 30 Tac Tba Tba To Qms Ttl Dc Mr Pk Tf To 82-3 Tac Qaf2 Ttl Dsy Qac 55 TRm 13 RED Tf Qac Tdv Qaf2/Qvb5 Qms IPc Tdv Tbct Qac Tbct 15 To Tcc SOu Dg 50 Qac TRcu Tse Tbct (Tcc, Tcc Toc 18 Tac Tac 8 Qal1 30 Pk Pq Qac Tac Tba Tba Tac Dc 40 Pk Tau Ttl) Ttl Op Op Dsy TRcs Tau 45 Qms Tse B Tcc Mr Qaf Qac Tbct Tbct Qms 28 2 Jn Qac C' (Tbct) Qms (Tbct) Tba Tac Tac To Qms 125 Qal1 Tcc Oe Qaf2 Oe Toc Tac Tac Ttl Tbm Ds R Pq Pk To Qms Dsy T m Pq Qmu To Tbct To Tse Qac Tcc Tcc Ttl Dg Dg Pk Tbct To Tac Tba Tda Ttl Ttl 35 Pk Tf To Tbct Tse Qaf1 Qms Ttl TRcu Qac Tbct 15 Tac (Ttl) 10 10 Qms Toc SOu Dc Mr Qac Tdv 20 Tse Tsg 125 Tcc 30 30 IPc Qaf1 Pk Tac Tac Qaf1 20 10 Tbct To Tba Tse Tbct Tsg Tcc TRm Tbct Tba Tba Tbct 15 Tac Tse Qal1 42 Qed Qla/ Qal2/Qvb5 Ttl Oe Toc Pq Pk Qmu TRcs Tse 8 Tcc Ttl Dg 40 Mr Ppk Pk Tbct Qaf Qvb B QTaf Tbct 1 5 5 Toc Ppk Tdv Qaf2 Qms Tsg Qms Qlg Ttl Qaf2 Dc Pq Tdv Pk Qms Qal3 12 Qlg 7 8 SOu SOu IPc Tau Qaf2 10 Qms Tse Ttl Tcc Toc 25 TRm To Tba Dg 35 Pq QTaf Pq 15 Tac Tba Tac Tac Tsg To Tcc Dc Pk Tdv Qac 20 Tba Tsg 725 Ttl Dsy 17 To Tse Tbct 7 SOu Ppk Tdv QTaf Tba Qms Ttl Qaf2 37 Qac Tba 42 Tcc 30 Pq Ppk Tac Qms 8 Ttl Ttl Ttl SOu Ppk 30 Tau Tdt Qaf2 Pk Tau 20 Tba Ttl Tau Tdv Tw Qal2 Tsg Tsg Tda 6 SOu Toc Pq Pk Tbct To Tba ZONE 725 Qla Qla/ QTaf 20 Qac Qac Tse E Tse Qms Qvb Tcc Pk Tdv Tdv Tdv 15 Qms 9 B 5 Qaf Mr PqPpk Pq Qms Tac Tac Qlg 2 Tcc QTaf Tdt Tw Tql Qal3 Tsg Ttl 4 Ttl 20 Qaf2 Pk Tw Tba ZON Qgt Dg Pq Qaf2 20 Pq Tdv To Tbct Tba Qlf Ppk Tbct Tac Tac Qal1 To Qlg Tdv Tdv Tw Qms IPc 25 Qaf Qmu Dc Pq Qaf2 Tau Tdt Mr Tbct Qms Tse 1 Qst Tsg Tsg IPc Ppk Ppk Tdv Tbc Qvb5 QTaf 27 20 Tac -Cpm Qaf2 Qaf2 Tbct Tau Tbct Qaf1 Qms Qal1 Tdv Tbct Qac Tse Tac Qms Qms 12 Tac Tda Qvb5 Tcc Qaf2 Tw Tse Qed -Cpm -Cp -Cpm Tcc IPc To Tbct Tse Tbct Qlg Ttl -Cwt? Qal1 Tdv Tw 30 Tac Tse Qlg Qlg -Cp -Cdh 25 Tac Qaf1 Qst T 25 S Tw Pq Tbct Qac Tbc To 20 Tsg 3 Qgt Qgt Qal IPc Tba Qaf2 1 Tau Tdv Tse Tba Taa Tse Tbc 10 B Tw To Mr Qms To T 25 S Tw Tau Tau Tbc To T To -Cwt? -Cpm Qaf2 Qaf2 Qac Tau (Tdv) Qms Tse L Tw Tau Qaf Tql Tbct Tsg Kcg -Cp Qvb4 Tbct 25 1 Tbc 20 Tmj Tbct U To -Cwt? - Tcc Qal1 Tcc Tdv Pq Tba Tbct A Tbc Tsg Qlg Cpm Qal2 Qaf2 IPc Tbct F Qaf2 Qgt - Qal2 Tcc Qaf2 Tau Tbc Tbci Tql Tbc - Cdh Qal1 10 Tbct Tbct Tmpi Qla Cpm Tcc Qaf2 Tse Taa Tmj Tbc Tsg -Cp Tcc Tcc Qal1 25 Tdv 15 Qms Tmj Qst -Cwt? -Cdh -Cp -Cpm QTaf Taa Tsg Qms Qal2 Tbct Tmj 30 Qaf2 Tbct - Kcg Qea Qaf Tw Tse Tbc 15 Cdh Qaf2 Qal2 Qcf 2 Tbct Tbct Tql Tbc Tbc Tmpi Tsg Qal2 Qal1 Qsa Tac Tsg Tsg Qaf1 -Cpm - Tdv Tdv Qaf2 Qst Taa Tsg -Cpm -Cdh Cdh Tcc Qcf Tdv Tdv Tmj Tac Qaf T Tsg 100 B Tcc Tbct Tac Tmj To 1 15 Tdv Qaf2 20 Qlf Qcf Qaf Qaf Tdv Qms 10 Qac Qms -Cdh -Cdh Qaf2 2 2 Tdv Qla Tcc Qea Qaf2 Qaf2 Qms Tb Tb To Tac To AUL Qaf2 Cp -Cdh Tmj 12 F - Qaf2 Tzt Tw Tbc Tse 20 Qaf2 Cpm Qea Tse Tbc 4 Tsg 100 Qvb4 Qcf Tdv Tdv To Taa Tmj -Cpm Tac 78-3 Tmj Tmj Tbc -Cpm -Cp To Tac Tmj 15 Tmj Qaf1 To Qea Tbci Qms Tb Qal1 Tmj Qms - Tw Tbci Tw Tac -Cdh Qvb Cdh Qaf Tbct Qaf1 4 2 Qms Tzt Tbct Tbct To 31 H 4 Tw Tzt Taa Qaf1 B Qea Qaf2 To Tw To AS 10 -Cdh Tdv Tac Tzt To Tse W Tmj To Trd Qea Tzt Tzt 25 Tse Qaf1 Taa Tmj Qaf 700 Qaf2 Tcc Tw Tmj Tzt Tbct Tse Qaf1 Tmj 1 Tgm Trd Qcf Qcf Tac To To Tac Tbc Qvb4 Tcc To Tbc Tac Tse Tse Tmj Tbct Qea Qea Tmj To Tba 10 5 Qaf1 Trd Tzt To Tse Qaf To Trd Qea Qms Tbct 1 Qaf To 700 Trd Tmj To Qac Qms Tbct Tse Tmj 2 Tmj Qcg Qea Tse Tse Tmj Qal1 Tmj Tmpb TbcTmpb Qlf Qaf2 To Tzt To 10 20 Tmj Tmj Tbc Qms Qaf - Qaf2 Tmj Tzt Tse Tmj Qaf2 Toi Toi Tsg Qed 2 pCg Qcf Tbci Tzt Tmj Tse Tmpl To B Tgm Qea To 32 Tbc 42 0000m Tqm Tdm Qea Qcf To To Tbc Toi Qms 7 N Tgm Tdv To Tzt To Tzt Tmj Tmj Tmj Tmj Tmj Tbct 15 CALDE Tdm Trd Qal1 Qac Tse 5 RA Tbc Trd Tbc Tbc Qac Qac Tmj 3 Qed Trd Tzt Tmj Tbc Tbct Qaf1 Tmpi Tmpi Qaf2 QTaf To To Tbc 8 Qms Qms Tqm Tqm Tmj To D' 25 16 Tbc Tmpi Qlg Tqm Qea Qea QTaf Qms To Tse Tac Tse Tmj Qaf 78-4 Tzt Qac To Tbct Toi Tmpi Tmpa 2 Qcf Qea QTaf Qal1 Tmpi Toi 42 Tdm Tac Tbci Qms 7 Qaf1 10 Qaf1 Tmpi Qgt Tgm Tmj Tmj Y 15 Tmpb B Tqm Tdm Tdm Trd Tac QTaf Tmpf Tmpl Tdm Qea Qea Tbct To Tbc Tmj Qac Tmj Tse DR PEAK Qgt Qea Tbct To Tmpl Tmpa Tqm Trd Qcf QTaf Tse Tse 10 Tbc Jn 2 Qaf2 Tqm Trd Qaf2 Tse Qaf2 Tmpf 4 Trd Trd p-Cg QTaf Tbci Tse Qms Tmj Qaf Jn Qcf Qms 1 Tmj Tmpi Tmpi Qaf Tdm Trd Qms 25 Tbc 25 30 Tbc Toi 2 Tdm Tgd Qms 15 Tbc Qms ER Qal2 Tbct Tse Tmj Tse I Tmpi Tmpl Trd Qvb4 Qea Tw Tzt Tbc 10 Toi Tmpa Qms To Tse Tbc 25 Qms 25 Qms Tbci Tmj SEV Qal1 Qcg Qea Tmj 15 MONROETmpf Qaf1 Trd Qms Tmpl Tmpl Qgt Trd Qms Tbc Qms Qaf2 Tmpf T 26 S Qaf2 Tbci Tmpl Qaf Qac Tmpf T 26 S B Qaf Trd Qms 10 Qms Tmj Tmj 2 Toi Qla 2 Tp-Cg Qea Tb Tmj 10 15 Tmj Qms Qaf2 Tmj 10 Tbc Tmpf Qms Qac 75 Tmj Qms To Qaf2 Tmpa Tp-Cg Trd Qms Tmpl Tmpl Qla Tsm Trd Qaf Qlg Tdm 2 Qea Qcg Trg Tb Tac Tmps Tmpf Toi Toi Qll Qaf Qea Tbc Tmpu Qaf2 75 000 1 Trd Qal Trg Tbci Tbci Tmj Tb Tmj Tmpf Qla Tgd 1 To Tmj Tbc Tmpf FEET Qaf2 Trd 8 Tmpi Tgd Qcf Tbc Tmj Toi Tqm Tbct Tac Tmj Tmj Tmj Tbct Tmpi 5 30 Tmpl (CENTRAL) Trd Tbc Qms Qms Tmd Tmps Qac B Qaf1 Tp-Cg Tsm Tbci 15 Tbc Tbc Qaf1 Toi Trd Tbc Tmpf 2 Qlg Trg Tmj Qms Tmj Tmps 675 000 Qaf Qal1 Tbc To Tse Tmpl Tgd Trg 2 Tbct Tbct Tse Tbc Qms Tbc Qac Toi Tmpi Qal1 79-3 Tgd Tbc Tbct Tmd Tmpf FEET Qll Qac Tmi Tmpl Qac Qaf2 Tbc Tmb CALDE Qms Tse Tmpi (SOUTH) Tgd Qms Tmb Qms Tm Tmi Tp-Cg Tqm Trd Qrk Tmd Toi Tmps Toi Tsm Qaf2 Tbc Tmpl 5 Tmpf B Tmpl Tdd Qvrd Tbct Tbc Toi Tmpf Tmi Tmpf 675 Tqm Qvrt Qaf2 Tbc QTaf Tbci Tbc Tbc Tmd Tmi Qaf2 - Tbci To Tmb Qms Qaf2 Tmpi Qaf TpCg KNAP Qms Tb Tse Tmpl 1 Trd Trd R Tbc Qal1 Qaf Tmb L Qms Tmi Tmpl Toi Trg 2 Tbci A Tci Tmpf Tmb Tmm Tmj Tci Tmpf Tmj Trg Tbci To 45 Tmj Tbci Tmr - Qst Tsm Tgd Tgd Trg Tmj Qms Qms Tmh Tmj Qac Tci pCg . BE Tmpl Tmpu Qac Qck Qaf2 To Qms Tmj Tmi Toi Tqm Tdd Trd Trd Tisg Tbc Qms Tmh Tmr Tci Qac Qms Qac Toi Tmj Tse Toi Qal1 Tp-Cg Qaf2 Tbc Tbci Tmj Qac Qms 38 Tmj 60Tmr Tbc Tmf Tmpl Tmi 2 Tmpu 38°30' Tsm Tigp Qac Qms Tmb Tmb MT Tbc Qms Qms Tmh 38°30' R 2 W 113°00' 1 575 000 FEET (CENTRAL) R 10 W 1 600 1 600 R 9 W 34 1 625 1 625 45' R 8 W 1 650 1 650 R 7 W 1 675 36 1 700 1 700 R 6 W 30' 37 1 725 1 725 R 5 W 38 1 750 1 775 1 775 39 15' 1 800 1 800 400000mE 1 825 1 850 000 FEET (SOUTH) 112°00'

Plate 1 of 2 SCALE 1:100,000 Geological Survey Map 195 Contour interval 40 meters DISCLAIMER Supplementary contour interval 10 meters GEOLOGIC MAP OF THE RICHFIELD 30' x 60' QUADRANGLE, Utah Geological Survey Although this product represents the work of professional a division of 2 1 0 2 4 6 8 10 Kilometers SOUTHEAST MILLARD COUNTY AND PARTS OF BEAVER, PIUTE, AND SEVIER COUNTIES, UTAH scientists, the Utah Department of Natural Resources, Utah Utah Department of Natural Resources 13°00' UTAH Geological Survey, makes no warranty, expressed or implied, in cooperation with U.S. Geological Survey 231 MILS 2 1 0 2 4 Miles by Millard regarding its suitability for a particular use. The Utah National Cooperative Geologic Mapping Program Co. Department of Natural Resources, Utah Geological Survey, Statemap Agreement No. 00HQAG0109 Lehi F. Hintze1,2, Fitzhugh D. Davis2, Peter D. Rowley3, Charles G. Cunningham4, Thomas A. Steven4, and Grant C. Willis2 shall not be liable under any circumstances for any direct, Base from U.S.G.S. Richfield 30' x 60' quadrangle, 1980 indirect, special, incidental, or consequential damages with GIS compilation: Basia Matyjasik, Angela Wadman (UGS), 2002 MAGNETIC DECLINATION respect to claims by users of this product. and Jeremiah B. Workman (USGS) AT CENTER OF SHEET 2003 Cartographer: James W. Parker Project Manager: Jon K. King 1Brigham Young University 2Utah Geological Survey 3Geologic Mapping, Inc. 4U.S. Geological Survey Plate 2 of 2 LITHOLOGIC COLUMN LITHOLOGIC COLUMN MAP AND CROSS-SECTION SYMBOLS

Utah Geological Survey Map 195 ? CONTACT-- Dashed where location inferred; queried where speculative on A NORTHWEST SOUTHEAST A' MAP THICKNESS SCHEMATIC THICKNESS OTHER AGE SYMBOL MAP UNIT Feet Meters COLUMN OTHER INFORMATION MAP MAP UNIT SCHEMATIC cross sections SYMBOL Feet Meters COLUMN INFORMATION

GEOLOGIC MAP OF THE RICHFIELD 30' x 60' QUADRANGLE, METERS FEET AGE Q-various Alluvial, eolian, glacial, and Lake Bonneville deposits 0-300± 0-90± ? NORMAL FAULT-- Dashed where location inferred; dotted where concealed; SOUTHEAST MILLARD COUNTY AND PARTS OF BEAVER, PIUTE, Tb flows in northernTushar Mountains 0-425 0-130 11-13 Ma? (On map) 3,000 Pavant 10,000 Qvb Basalt of Ice Springs 0-200 0-60 660?-4,000? years old ? queried where existence uncertain; bar and ball on downthrown side; arrows AND SEVIER COUNTIES, UTAH thrust -Cop 1 (Shown vertical or show relative movement on cross section Sunset Canyon Qvb Basalt of Tabernacle Hill 0-200 0-60 14,320 yrs B.P. Tmd Late rocks ------14-19 Ma inclined on cross section) by 2,500 Pavant well (60-1) Tf 8,000 2 -Ct -Cum Qvb3 Basalt of Pahvant Butte 0-100 0-30 Tmr Red Hills Member <600 <180 18.9 Ma K-Ar STEEPLY DIPPING FAULT-- Sense of motion not known or complex; dashed 2,000 -Cum thrust Jn O ? Lehi F. Hintze, Fitzhugh D. Davis, Peter D. Rowley, Charles G. Cunningham, Q ? 6,000 Qvr Rhyolite of White Mountain and 0-120 0-40 0.4 and 0.5 Ma, respectively Mount Belknap where location inferred; dotted where concealed SO D 4,*Qvrt,*Qvrd Tmj *Joe Lott Tuff Member 0-400 0-120 1,500 IPM is source Thomas A. Steven, and Grant C. Willis -Cop TR Jn Qcg,Qcf Basaltic andesite of Cedar Grove (cg), Cove Fort (cf) 0-800 0-250 0.3 and 0.5 Ma, respectively NORMAL FAULT-- Inferred and delineated from gravity data; concealed; bar TR ? 4,000 Tmb Mount Baldy Rhyolite Member <2,600 <800 Age uncertain 1,000 -Cop Qvb4 Basalt of Kanosh, Beaver Ridge and Mineral Mountains 0-300 0-90 0.5 to 0.9 Ma and ball on downthrown side 2003 -Cop P TR Middle tuff member <1,640 <500 Present in QUATERNARY Tmm *Qrk,*Qck Basaltic andesite of Red and Crater Knolls 0-200 0-60 ~1.0 Ma upper Tmj 500 2,000 TEAR FAULT-- High-angle fault with strike-slip offset; dashed where location IPM Tmh Lower heterogeneous member 230 70 UTAH GEOLOGICAL SURVEY -Ct Qvb5,Qva5 Basalt of Black Rock, Andesite of Beaver Ridge 0-200 0-60 1.0-1.5 Ma inferred; dotted where concealed; arrows show relative movement on map Sea level Sea level a division of SO IPM D QTlf,QTaf Fine-grained lake sediments (lf); alluvial-fan deposits (af) 0-1,000 0-300 0.7-2.0 Ma in Tmf Fine-grained granite intrusions 20-21 Ma (Map) UTAH DEPARTMENT OF NATURAL RESOURCES -500 D Tbm Basaltic andesite of Burnt Mountain 0-500 0-150 2.1 Ma Volcanics Mount Belknap THRUST FAULT-- Dashed where location inferred; dotted where concealed; SO -2,000 Tmi Crystal-rich domes and plugs ------barbs on upper plate; arrows show relative movement on cross sections in cooperation with Thin surficial deposits not shown T.D. 8,762 feet Subsurface structure conjectural Trt Rhyolite of N. Twin Peak, S. Twin Peak, Mid-Dome ------2.35-2.5 Ma (Cross section) THE UNITED STATES GEOLOGICAL SURVEY -1,000 NOTE: Ma ages Tmpi, Tci Intracaldera intrusions intrusions 21-22 Ma Tcc Basalt of Cove Creek Oak 0-400 0-120 2.55 Ma are from K-Ar data ATTENUATION FAULT -- Younger over older rocks with strata thinned and NATIONAL COOPERATIVE GEOLOGIC MAPPING PROGRAM City Fm. and may contain Ttl Toc Limestone of Twin Peaks 0-262 0-80 Lacustrine MIOCENE Tmps Sedimentary rocks 200 60 cut out between; present in Mineral Mountains; barbs on upper plate STATEMAP Agreement No. 00HQAG0109 0-2,000 ft substantial error. Tmpu Tlr Basalt of Ridge 0-200 0-60 2.5 Ma (0-600 m) Most units are local Tmpl Lava flows of Monroe Peak 500 150 21.3 Ma K-Ar CALDERA MARGIN-- Dashed where location inferred; dotted where concealed; Tcr Rhyolite of Cudahy Mine, Rhyodacite of Coyote Hills 0-650 0-200 2.6 & 2.7 Ma and thus not superposed on one Tmpa Volcanic rocks of Sage Flat 200 60 Andesitic hachures on downthrown side; mostly topographic boundary of caldera. PLIOCENE Tse Formation 600-1,000 180-300 5 to 14 Ma another. Stacking *Trg Rhyolite of Gillies Hill ------~9 Ma on this chart is a Tmpf Lava flows of Monkey Flat Ridge <500 <150 Dacitic DETACHMENT RELATED TO MASS MOVEMENTS-- Dashed where location CORRELATION OF GEOLOGIC UNITS best estimate. Some inferred; present on west side of Pahvant Range (where Navajo Sandstone has B NORTHWEST SOUTHEAST B' Tht Tuff of Holden 0-200? 0-60? 10.5-10.8 Ma? thicknesses were Tmpb Lava flows of Bagley Meadows 650 200 Flows or dome crept downslope on underlying Chinle) estimated from undivided *various Intrusions and gneiss complex in Mineral Mountains ------11-25 Ma Monroe Peak Cross METERS FEET topographic maps. Toi,To *Osiris Tuff (i=intracaldera) 0-1,150+ 0-350+ Pahvant Range intracaldera rocks, caldera is source LINEAMENT -- Shown west of White Sage Flat, may be concealed fault trace Sections Map Tqm Quartz monzonite of Mineral Mountains Stock 18 Ma of Monroe Peak Caldera Volcanics 3,500 Millard County Sevier County ? Tzt Zeolite tuff 400 120 24.6 Ma? Tmj Joe Lott Tuff Member, Mt. Belknap Volcanics 0-400 0-120 19 Ma, from Mt. Belknap caldera Paxton TERTIARY FOLD AXES -- Dotted where concealed (arrows on axes show plunge) 3,000 10,000 Woolsey Pavant well To Osiris Tuff 0-200 0-60 23 Ma, from Monroe Peak caldera Tsg Volcanic rocks of Signal Peak 2,100 650 Andesitic Red Ridge(?) Corn (82-3) Qal1 Ridge thrust -Cum SO Tda Antimony Tuff Member, Mt. Dutton Fm. 200 60 25.4 Ma K-Ar anticline 2,500 - MIOCENE thrust Ct Creek O 8,000 *Tisg, *Tigp Syenite (sg) and gabbro (gp) of Cedar Grove Intrusions ~23 Ma Qvb1 P Tvs ? Tba Basaltic andesite lava flows 500 150 May be part Qsa 2,000 Q TR ? Tgm Granodiorite of Mineral Mountains Stock 25 Ma Qed Qea Qpm P -Cop Tf of unit Tsg syncline Qaf1 Qac Q Jn 6,000 Taa Qal2 D -Cambrian Tac Tuff of Albinus Canyon 0-650 0-200 25.3 Ma Tac *Tuff of Albinus Canyon 0-650 0-200 25.3 Ma Qmt Qms ? Tf (+ TKn?)

Holocene 1,500 Qmu Qst Tbct Three Creeks Tuff Member, Bullion Canyon Volcanics 0-720 0-220 27 Ma Tcp Crystal-poor dacitic lava flows 100-160 30-50 overturned anticline ? TR 4,000 1,000 ? Tw Volcanic rocks of Wales Canyon 440 135 Tbc Bullion Canyon Volcanics 5,000± 1,500+ 22-30 Ma T ESCARPMENT AT HEAD OF SLUMP/SLIDE AREA IPM P R 2,000 Qvb2 Qgt Qdf Qdg Qlg Qls Qlf Qll Qlm Qla 500 Tdv Volcanic rocks of Dog Valley 0-1,200 0-370 ~33 Ma Tbci Monzonitic / latitic intrusions intrusions 23-27 Ma ? ? IPM IPM P Tdt Tuff of Dog Valley 400± 120± 33.6 Ma Ar/Ar STRIKE AND DIP OF BEDDING-- ? Sea level Sea level ? ? Hiatus OLIGOCENE Tbct *Three Creeks Tuff Member 0-720 0-220 27 Ma

Late Age uncertain IP Tdvt, Tov Dipping Vat Formation, older volcanic rocks ~600 ~180

OLIGOCENE 65 -500 and inclined ? Qal3 Thin surficial deposits not shown Subsurface structure conjectural -2,000 Tau Aurora Formation 0-1,200 0-360 38-40 Ma Tql Quartz latite dome and rhyodacite flow 650 200 Age uncertain splay(?) thrust M unconformity Q Qaf2 Qvb3 -1,000 M Tch Crazy Hollow Formation 0-350 0-107 *Also on main lithologic column vertical -4,000 ? ? D Tg Green River Formation 0-800 0-245 ? -1,500 splay thrust 42 overturned M/D Freshwater limestone, Qcg Paxton thrust -6,000 Tf-various Flagstaff Formation 0-3,500 0-1,070 Qvr ? bioturbated Fillmore 4 -2,000 Jurassic strata horizontal Qvrd 0-50 Middle Tbr Breccia of Cat Canyon 0-165 QUATERNARY Qcf T.D. 14,826 feet Pleistocene Qvrt -2,500 -8,000 Sandstone and pebble ? ? PALEO.-EO. TKn North Horn Formation 0-2,500 0-760 6 STRIKE AND DIP OF PLANAR FEATURES IN ASH-FLOW TUFF Qvb4 conglomerate ? BORDEN HILL MEADOW ? Ktm Tectonic melange beneath Pavant thrust plate 0-200 0-60 CANDLANDSPRING FILLMORE SAND RIDGE TABERNACLE MT. CATHERINE BEEHIVE PEAK DEEP EXPLORATION WELL-- map symbol on left, cross section symbol on Qrk Kc,Kcg Canyon Range Conglomerate, Conglomerate of Mineral Mtns. 0-866 0-264 1,7 1,7 1 1 1 2,6 13 13

CRET. right Qvb5 Qck Millard Co. Sevier Co. QTlf 257 15 Early QTaf Jn Navajo Sandstone 2,000± 600± Eolian, cross-bedded SINKHOLE (in QTlf) Qva5 JUR. ? TRcu Chinle Formation, upper member 69-274 21-83 Clayey, prone to slump VOLCANIC VENT/ CRUZ Kanosh KANOSH PEAK RICHFIELD Tbm TRcs Chinle Formation, Shinarump Conglomerate Member 177-566 54-172 CAT CANYON BLACK POINT WHITERichfield PINE C NORTHWEST SOUTHEAST C' SIXMILE POINT SUNSET PEAK ? ? ? 1,7 1,8 1,9 1,4 1,6 2,11 13 19 SHORELINES-- dashed where inferred; dotted where concealed; queried where Trt TRm Ripple marks, marine fossils conjectural METERS FEET Moenkopi Formation 1,876 572

Red Ridge TRIASSIC Tcc Cherty; 497 feet (152 m) thick P ? Provo shoreline of Lake Bonneville-- queried where uncertain 2,500 thrust Pk Kaibab Limestone 1,160 P Tf 8,000 353 in subsurface Ttl IPM P Tvs Bonneville shoreline of Lake Bonneville Pliocene 2,000 SO B Toc O SO TR Jn Pq Queantoweap Sandstone 817 249 PEAK Q -Cop -Ct 6,000 ANTELOPESPRING ANTELOPEVALLEY RED RIDGE ELSINORE Tlr IPM P TR BLACK ROCK DOG VALLEY JOSEPH PEAK ANNABELLA 1,500 D IPM Ppk Pakoon Dolomite 445 136 1,10 1,18 2,20 2,5 2,5 16 12 14 Qlf/QTaf Indicates thin cover of the first unit overlying the second unit - P TR PERMIAN Tcr MARYSVALE VOLCANIC FIELD Ct D 4,000 1,000 ? O SO IPM TR IPc Callville Limestone 538 164 Qms (TRc) Indicates unit(s) involved in mass movement MINERAL P . P I - -Cu P 2,000 70 15 Trg ? MOUNTAINS 500 Ct IPM P Fossil corals and gastropods O SO D D Mr Redwall Limestone 1,545 471 Tse - - IPM P IPM Tb Cu+Cm O Pinyon Peak Ls equivalent READ Sea level Sea level MISS. Tht Trd PINNACLEPASS Thin surficial deposits not shown Modified from George (1985) and Davis (1983) Dc Cove Fort Quartzite 82-160 25-49 COVE FORT ANTELOPERANGE CINDER CRATER Piute Co. MARYSVALECANYON MONROE PEAK ? ? 2 2,3 2,17 2,17 TRAIL MOUNTAIN ? Dg Guilmette Formation 575 175 Stromatoporoids Beaver Co. Millard Tdd Ds Simonson Dolomite 185 56 Index map showing sources of geologic mapping and 7.5-minute quadrangles Tgd Dsy Sevy Dolomite 710 217 Light-gray dolomite Tsm DEVONIAN SOURCE LIST FOR GEOLOGIC MAPPING 7. Hintze, L.F., 1984, Geology of the Cricket Mountains, Millard County, Utah: 15. Rowley, P.D., Cunningham, C.G., Steven, T.A., Workman, J.B., Anderson, 566- U.S. Geological Survey Open-File Report 84-683, 14 p., plates 4, 5, and 7, J.J., and Theissen, K.M., 2002, Geologic map of the central Marysvale volcanic

S. SOu Laketown and Fish Haven Dolomites, undivided 173-300 ? 1,000 scale 1:24,000. field, southwestern Utah: U.S. Geological Survey Geologic Investigations Surficial Geology D NORTHWEST SOUTHEAST D' Oe Eureka Quartzite 150-180 45-55 8. Hintze, L.F., 1984, Geology of the Cricket Mountains, Millard County, Utah: Map I-2645A, scale 1:100,000; with clarification locally from Cunningham, 1. Oviatt, C.G., 1991, Quaternary geology of the Black Rock Desert, Millard C.G., Steven, T.A., Rowley, P.D., Glassgold, L.B., and Anderson, J.J., 1983, Tmd Tqm Orthid brachiopods at top U.S. Geological Survey Open-File Report 84-683, 14 p., plate 8, map scale METERS Red Ridge(?) FEET County, Utah: Utah Geological and Mineral Survey Special Study 73, 23 1:24,000; mapping of volcanic rocks by L.F. Hintze for this publication, scale Geologic map of the and adjoining areas, Marysvale volcanic Tvs Op Pogonip Group 1,125- 343-350 Tmr thrust Cove 1,200 Intraformational conglomerate p., scale 1:100,000; locally modified by L.F. Hintze and F.D. Davis, 1991 1:24,000, modified from Crecraft, H.R., Nash, W.P., and Evans, S.H. Jr., 1981, field, Utah: U.S. Geological Survey Miscellaneous Investigations Map I-1430, 2,500 I-15 Creek Well 8,000 and 1992, unpublished mapping for this publication, scale 1:24,000. Late Cenozoic volcanism at Twin Peaks, Utah, geology and petrology: Journal scale 1:50,000. Tmb ? IPM 78-3 SO P P Tvs Tvs Q ORDOVICIAN Ajax 700 ft - Top not preserved in 2. Davis, F.D., and Hintze, L.F., 1991, 1992, and 1999, unpublished mapping of Geophysical Research, v. 86, p. 10,303-10,320, scale 1:200,000. 16. Steven, T.A., 1979, Geologic map of volcanic rocks in the Sevier NE (Joseph Tmj 2,000 Tvs Tvs -C a OC n Notch Peak Fm. 100+ 30+ Tp -C g Tvs Tvs Dolomite (210 m) map area for this publication, scales ~1:50,000 and 1:24,000. Peak) quadrangle, west-central Utah: U.S. Geological Survey Miscellaneous Tmm Tvs 6,000 -C ou Orr Fm, upper mbrs. 405 122 9. Hintze, L.F., 1990 and 1991, unpublished mapping for this publication, scale ? IPM ? ? Opex 390 ft Tricrepicephalus Field Studies Map MF-1108, scale 1:24,000; and Hickox, C.W., 1971, Geology 1,500 P TR SO ? ? -C ox Bedrock Geology 1:24,000. Tvs ? SO ? Formation (120 m) -C ob Orr Fm, Big Horse Mbr. 656 200 O D D Probably ? 4,000 3. Coleman, D.S., Bartley, J.M., Walker, J.D., Price, D.E., and Friedrich, A.M., 10. Hintze, L.F., 1991, unpublished mapping for this publication, scale 1:24,000, of a portion of the Pavant Range allochthon, Millard County, Utah: Houston, Tmh IPM TR Paleozoic strata UPPER Texas, Rice University, Ph.D. dissertation, 67 p., scales 1:63,360 and 1:31,360; 1,000 - Probably folded Paleozoic strata -Cu Wah Wah Summit - Trippe 1997, Extensional faulting, footwall deformation and plutonism in the partly modified from Crecraft, H.R., Nash, W.P., and Evans, S.H. Jr., 1981, Tmi Tmf Cu P ? T Tbci Upper and -C wt 1,420± 433± O R ? Fms., undivided Mineral Mountains, southern : Brigham Young University Late Cenozoic volcanism at Twin Peaks, Utah, geology and petrology: Journal modified by L.F. Hintze, 1991, and L.F. Hintze and G.C. Willis, 1999, ? 500 No log, fractured Paleozoic and 2,000 Middle Eldoradia Mesozoic(?) strata 2,400 ft Geology Studies, v. 42, part 2, p. 203-233, scale 1:21,300; Walker, J.D., of Geophysical Research, v. 86, p. 10,303-10,320, scale 1:200,000. unpublished mapping for this publication, scale 1:24,000. Tdm Thin surficial deposits not shown Subsurface relationships conjectural T.D. 5,209 feet -C um Cambrian (735 m) and Bartley, J.M., 1992, unpublished map, scale 1:12,000; and Sibbett, B.S., 11. Hintze, L.F., 1992, and Hintze, L.F., and Willis, G.C., 1999, unpublished 17. Steven, T.A., and Morris, H.T., 1983, Geologic map of the Cove Fort [15'] Tmps ? Sea level Sea level carbonate -C cm Limestone of 1,970 600 Tmpi rocks Cricket Mountains and Nielson, D.L., 1980, Geology of the central Mineral Mountains, Beaver mapping for this publication, scale 1:24,000, partly modified from Hickox, quadrangle west-central Utah: U.S. Geological Survey Miscellaneous Inves- Tmpl County, Utah: Earth Science Laboratory, University of Utah Research tigations Series Map I-1481, scale 1:50,000; modified by L.F. Hintze, 1991, Tmpa C.W., 1971, Geology of a portion of the Pavant Range allochthon, Millard Tmpu Institute Report ESL-33 (DOE/ET/28392-40), 42 p., scale 1:24,000. County, Utah: Houston, Texas, Rice University, Ph.D. dissertation, 67 p., 1999, unpublished mapping for this publication, scale 1:24,000. TERTIARY MIDDLE Ophir 850 ft -C w Whirlwind Fm. 200-265 60-80 Ehmaniella Tmpf -C op 4. Crosby, G.W., 1959, Geology of the south Pavant Range, Millard and Sevier scales 1:63,360 and 1:31,360. 18. Whelan, J.A., and Bowdler, James, 1979, Geology of the Antelope Springs Tmpb Formation (260 m) Dome-Chisholm Tci -C dh 850± 260± Glossopleura Counties, Utah: Brigham Young University Geology Studies, v. 6, no. 3, 12. Hintze, L.F., 1992, and Hintze, L.F., and Willis, G.C., 1999, unpublished quadrangle, Millard County, Utah: Utah Geology, v. 6, no. 2, p. 81-85, scale (Peasely)-Howell Fms. 59 p., scale 1:65,000; modified by L.F. Hintze, 1992, unpublished mapping 1:62,500; and Hintze, L.F., 1991-1992, unpublished mapping for this publication, est. mapping for this publication, scale 1:24,000 and ~1:50,000; modified from CAMBRIAN for this publication, scale 1:24,000. scale 1:24,000; north end of Mineral Mountains from Coleman, D.S., Bartley, - Tintic -C p Pioche Formation 800± 245± Trace fossils Steven, T.A., 1979a, Geologic map of the Monroe NW (Elsinore) quadrangle, Toi C t 3,300 ft 5. Davis, R.L., 1983, Geology of the Dog Valley-Red Ridge area, southern J.M., Walker, J.D., Price, D.E., and Friedrich, A.M., 1997, Extensional faulting, Tisg To Quartzite (1,000 m) west-central Utah: U.S. Geological Survey Miscellaneous Field Studies Map Pavant Mountains, Millard County, Utah: Brigham Young University Geology MF-1107, scale 1:24,000. footwall deformation and plutonism in the Mineral Mountains, southern Sevier Tzt E WEST Desert: Brigham Young University Geology Studies, v. 42, part 2, p. 203-233, ? Tbc EAST E' Studies, v. 30, part 1, p. 19-36, scale 1:24,000; modified locally by L.F. 13. Lautenschlager, H.K., 1952, Geology of the central part of the Pavant Range, Tigp Tgm METERS FEET THRUST FAULTED BASE Prospect Hintze, 1992, for this publication, scale ~1:50,000. Mapping of volcanic scale 1:21,300. Tac Tda Taa Tba Tsg Tm Tbci ? Cricket Mountains Black Rock Pink vitreous Utah: Columbus, Ohio State University, Ph.D. dissertation, 188 p., map scale Georges syncline Paleozoic sequence -C pm Mountain 4,000+ 1,200+ rocks by L.F. Hintze, 1992 for this publication, scale 1:24,000, with 1:31,680; modified locally using Hickox, C.W., 1971, Geology of a portion 19. Willis, G.C., 1994, Interim geologic map of the Richfield [7.5'] quadrangle: ? Tf Desert LOWER quartzite Tbc 2,000 -Cu listed above is part Quartzite clarification from G.C. Willis, 2001-02, sketch maps; modified from Steven, of the Pavant Range allochthon, Millard County, Utah: Houston, Texas, Rice Utah Geological Survey Open-File Report 309, 105 p., scale 1:24,000. Tcp Tbr Q Tbr 6,000 ? -Cm Q of the parautocthonous T.A., and Morris, H.T., 1983, Geologic map of the Cove Fort [15'] quadrangle, University, Ph.D. dissertation, 67 p., scales 1:63,360 and 1:31,360; modified 20. Zimmerman, J.T., 1961, Geology of the Cove Creek area, Millard and Beaver Tbct 1,500 -Cm -Cm Pavant thrust plate west-central Utah: U.S. Geological Survey Miscellaneous Investigations Tw Tql - by L.F. Hintze, 1991, and L.F. Hintze and G.C. Willis, 1999, unpublished Counties, Utah: Salt Lake City, University of Utah, M.S. thesis, 91 p., scale ? Tbc ? Cl Tvs 4,000 in the eastern part of Series Map I-1481, scale 1:50,000. mapping for this publication, scale 1:24,000. 1:24,000; and Hintze, L.F., 1991, unpublished mapping for this publication, Tdt 1,000 the quadrangle. pC- g Banded gneiss in Mineral Mountains 1,750 Ma Tdv Tdvt Tov Precambrian -Cm 6. George, S.E., 1985, Geology of the Fillmore and Kanosh quadrangles, scale 1:24,000, partly modified from Crecraft, H.R., Nash, W.P., and Evans, - 14. Rowley, P.D., Steven, T.A., and Kaplan, A.M., 1981, Geologic map of the ? ? 500 strata -Cl Cu + 2,000 Cambrian rocks above are exposed in the Cricket Mountains (on the Millard County, Utah: Brigham Young University Geology Studies, v. 32, S.H. Jr., 1981, Late Cenozoic volcanism at Twin Peaks, Utah, geology and Unconformity -Cl - Monroe Peak NE (Annabella) quadrangle, Sevier County, Utah: U.S. Geological -Cl -Cl Cm Canyon Range thrust plate), and are partially exposed and structurally part 1, p. 39-62, scale 1:24,000; modified locally by L.F. Hintze for this Survey Miscellaneous Field Investigations Map MF-1330, scale 1:24,000; petrology: Journal of Geophysical Research, v. 86, p. 10,303-10,320, scale Sea level Sea level thinned in the Mineral Mountains publication. partly modified by G.C. Willis, 1999. 1:200,000. Tau Some thin surficial deposits and faults with offset not shown PRECAM. *Unit mostly in Beaver County Diagram is schematic-- no fixed thickness scale Tch

Tg

Tfuw DESCRIPTION OF GEOLOGIC UNITS younger alluvium; thickness probably 10 feet (3 m) or less. Basaltic andesite of Burnt Mountain--Black to medium-gray, fine- Mount Belknap Volcanics and related rocks--Derived from several intrusions (Tmpi, Tci); age about 23 Ma; thickness at least 1,150 Dog Valley and locally intertongues with Three Creeks Tuff on thins rapidly to south or grades into lower red member of Flagstaff Eureka Quartzite--Light-colored, medium-bedded, vitreous quartzite Tfur Tbm to medium-grained, porphyritic, crystal-rich basaltic andesite with volcanic centers, mostly located in the Tushar Mountains; site of feet (350 m), base not exposed. north margin of Marysvale volcanic field; about 440 feet (135 m) Formation. Oe with lower half thinner bedded quartzite, sandstone, and dark, fissile Qll Lacustrine lagoon deposits--Sand, silt, clay, and silty marl that Tfmw accumulated in lagoons behind (landward from) gravel barrier phenocrysts of labradorite, olivine, orthopyroxene, and clinopyroxene; uranium, molybdenum, and alunite mineral deposits; Mount Belknap Osiris Tuff, outflow facies--Resistant light-gray and reddish-brown, thick. Locally resembles Wah Wah Springs Formation. Conglomerate of Mineral Mountains--Pebble-cobble conglomerate shale; 172 feet (52 m) thick in upper Corn Creek Canyon. Quaternary surficial units, undivided--On cross sections only; for map unit includes vent cone; age about 2.1 Ma; maximum thickness caldera fill equivalent to Joe Lott Tuff Member of Mount Belknap To Kcg Tf Tf Q included units see correlation chart and descriptions. beaches of Lake Bonneville; present south of Borden and east of moderately crystal-rich, densely welded, rhyodacitic ash-flow tuff Tuff of Dog Valley - Mostly resistant, gray, tan and pink, crystal- of limestone, quartzite, sandstone, and chert clasts in a sandy Pogonip Group--Fossiliferous, interbedded shale and limestone at Tfmr Twin Peaks; locally includes younger alluvium; generally less than about 500 feet (150 m). Volcanics, which is caldera outflow; age 12 to 21 Ma; units described with drawn-out pumice fragments; contains one or two cooling Tdt rich, moderately welded, dacitic, ash-flow tuff; exposed near Cove limestone matrix where it rests on Cambrian rocks; similar Op top; underlain by medium-gray, thin- to medium-bedded limestone, Qal Alluvium, late Holocene--Youngest alluvium in the channels, 10 feet (3 m) thick. Rhyolite of North Twin Peak, South Twin Peak, and Mid-Dome-- separately. units, commonly with basal black vitrophyres; outflow from Monroe Fort and on the north flank of the Marysvale volcanic field; locally conglomerate present beneath overthrust Cambrian quartzite; may with intraformational conglomerate and sparse chert, and thin shale Tflw 1 floodplains, and low terraces of the Sevier River, , Trt Lacustrine marl--Fine-grained, thinly bedded to laminated, white to Light-brownish-gray rocks from these three rhyolite domes are of Late rhyolite dikes, stocks, and domes--Moderately resistant, gray Peak caldera in southeast part of map area; age 23 Ma; maximum interlayered with volcanic rocks of Dog Valley; looks like tuff of be Tertiary where it rests on other Cambrian rocks; about 110 feet interbeds; 1,200+ feet (350+ m) thick in upper Corn Creek Canyon. Chalk Creek, Corn Creek, Cove Creek, and other large streams; Qlm Tmd Tflr ? light-gray, offshore to deep-water marl deposited in Lake Bonneville; similar, but not identical, composition; phenocryst content from 3 and pink, flow-foliated, crystal-poor, glassy to aphanitic, rhyolite thickness about 200 feet (60 m). Wah Wah Springs Formation and Three Creeks Tuff; Ar/Ar age (33 m) thick. Ajax Dolomite--Dark-gray, massive dolomite with a few interbeds Tbr includes overbank and marsh deposits in abandoned meanders of to 30 % and includes plagioclase, quartz, sanidine, and biotite; dikes, small stocks, volcanic domes, and lava flows from scattered 33.6 Ma; maximum thickness about 400 feet (120 m). -Ca ostracodes are abundant throughout marl and, locally, gastropods Syenite of Cedar Grove--Medium to coarse-grained, porphyritic to Canyon Range Conglomerate--Massive, reddish-gray conglomerate of light-gray dolomite and bluish-gray limestone with "algal" TKn TKn ? ? the Sevier River; consists of sand, silt, and clay with lenses of groundmass is microcrystalline quartz, feldspar, Fe-Ti oxides, apatite, vents; age 14-19 Ma; domes as thick as 330 feet (100 m); includes Tisg Kc gravel; silt in lower Pahvant Valley; less than 100 feet (30 m) thick are present at top and base of marl; 0 to 30 feet (0-9 m) thick. A equigranular rock containing mostly orthoclase and plagioclase, Volcanic rocks of Dog Valley--Heterogeneous assemblage of andesitic with interbedded sandstone lenses; present locally beneath North stromatolites; thickness about 700 feet (210 m) in upper Corn Creek Kcg layer of basaltic ash of Pahvant Butte is interbedded in the upper sphene, and zircon; age 2.35 to 2.5 Ma; thickness (exposed height) rhyolite of Big Star of Cunningham and others (1983). Tdv to dacitic rocks including lava flows, volcanic mudflow breccias, Horn Formation in the central Pahvant Range and southwest of Canyon. ? along Sevier River; mostly 0 to 20 feet (0-6 m) thick, but may be lesser hornblende and pyroxene, and sparse biotite; cuts gabbro Kc part of Qlm and is commonly 1 to 6 inches (2.5-15 cm) thick. This up to 1,000 feet (300 m). Red Hills Tuff Member, Mount Belknap Volcanics--Reddish-brown and minor moderately welded ash-flow tuff similar to some in the Kanosh; rests unconformably on Paleozoic strata; maximum exposed Opex Formation--Medium-gray, medium-bedded, bioclastic limestone Ktm thicker locally. Tmr porphyry (Tigp); age 23 Ma. -Cox CRET. ? gray to black basaltic ash was blown into the atmosphere during a Basalt of Cove Creek--Dark-gray, olivine-tholeiite flow rock; map to reddish-tan and light-gray, crystal-poor, densely welded, rhyolite Needles Range Group, but here recognized as tuff of Dog Valley; thickness about 850 feet (260 m). with a few thin interbeds of dolomite and shale; contains Alluvium, middle and early Holocene--Sand, silt, and clay in the hydrovolcanic eruption when Lake Bonneville was near its highest Tcc unit includes cone; age about 2.55 Ma; maximum thickness about ash-flow tuff; erupted from small Red Hills caldera just south of Tigp Gabbro porphyry of Cedar Grove--Dark-gray, strongly porphyritic age about 33 Ma; maximum thickness up to 1,200 feet (370 m). Major unconformity Qal2 floodplain of Cove Creek, isolated remnants of older Chalk Creek gabbro with phenocrysts of labradorite and clinopyroxene in a felted Tricrepicephalus trilobites; thickness 390 feet (120 m) in upper level about 15,500 yr B.P. 400 feet (120 m). map area, about 3 miles (5 km) north of Marysvale; K-Ar age 18.9 Older volcanic rocks--Poorly to moderately resistant, light-gray, PAVANT THRUST FOOTWALL, PAHVANT RANGE Corn Creek Canyon. and Corn Creek sand and gravel near Fillmore and Kanosh matrix of plagioclase microlites and Fe-Ti-oxide grains; cuts and Tov Jn Jn Lacustrine and alluvial deposits, undifferentiated--Mixed and reworked Limestone of Twin Peaks--Light-gray to yellowish-gray lacustrine Ma; maximum thickness about 600 feet (180 m). light- to dark-green, brown, and red volcanic mudflow breccia and Tectonic melange beneath Pavant thrust plate--Mixture of rocks from Upper and Middle Cambrian carbonate rocks, undivided--Includes: JUR. (respectively), along a stream near White Sage Flat, in the Pahvant alters Bullion Canyon Volcanics (Tbc) southwest of Cove Fort. Ktm Qla gravelly lacustrine and alluvial deposits on piedmont slopes; grades Ttl limestone and marlstone with thin interbeds of silt, sand, and pebble Joe Lott Tuff Member, Mount Belknap Volcanics--Light-gray or subordinate lava flows; flows and clasts are dacitic; exposed in Triassic and upper Paleozoic strata that were dragged along beneath -Cum Range along East Creek, and south of the Sevier River southwest Granodiorite of Mineral Mountains--Speckled gray, medium-grained, strata between Opex and Ophir Formations in upper Corn Creek TRcu from pebbly sand and silt to sandy pebble gravel; generally 0 to 12 conglomerate; locally prone to slumping; maximum thickness 262 Tmj brownish-gray, crystal-poor, slightly to moderately welded, alkali- northeast Annabella quadrangle, underlying Three Creeks Tuff and the thrust plate; thickness up to 200 feet (60 m), or more locally. of Elsinore; 0 to 30 feet (0-9 m) thick. Tgm equigranular, locally foliated rock composed of plagioclase, K- Canyon, strata between the Ajax and Ophir on the north margin of feet (0-4 m) thick, but may be thicker locally. feet (80 m). rhyolite ash-flow tuff containing 1 to 2 % phenocrysts of quartz, overlying Aurora Formation; lower part may be lateral equivalent Navajo Sandstone--Reddish-brown, fine-grained, cross-bedded, cliff- map area, and may include all Cambrian strata above the Ophir TR TRcs Alluvium, pre-Lake Bonneville(?)--Silt, sand, and pebble to boulder feldspar, quartz, hornblende, biotite, and trace minerals; stock Jn Qal Basalt of Ice Springs--Contains 2 % phenocrysts and has a greater Basalt of Lava Ridge--Dark-gray olivine-normative basaltic andesite; sodic plagioclase, sanidine, and a trace of biotite; outflow from of upper Dipping Vat; 660 feet (200 m) thick. forming sandstone; exposed thickness about 2,000 feet (600 m). Formation in thicker exposures between these two areas and on 3 gravel in faulted and tilted terraces along Sevier River southwest Qvb Tlr weathers to gray, sandy grus; age about 25 Ma. TRm 1 glass content than other in the Black Rock Desert; estimated age about 2.2 to 2.5 Ma; maximum thickness about 200 feet (60 Mount Belknap caldera, mostly south of map area; age about 19 Dipping Vat Formation--Poorly cemented, light-gray to pale-bluish- Triassic strata, undivided--On cross sections only; for included units cross sections. Only includes Middle Cambrian strata above the

TRIASSIC of Elsinore; 0 to 40 feet (0-13 m) thickness exposed; age uncertain, Zeolite tuff--Soft, white, partially welded, crystal-poor, rhyolitic ash- to be between 4,000 and 660 years old; may be as much as 200 feet m). Ma; thickness about 200 feet (60 m) near Cove Fort and as much Tzt Tdvt gray, volcaniclastic sandstone, conglomerate, and reworked volcanic TR see correlation chart and descriptions. Ophir southwest of Kanosh. These carbonate rocks are unfossiliferous Unconformity might be Holocene. flow tuff; contains 10 to 30 % lithic fragments; matrix altered to (60 m) thick. Rhyolite of Cudahy Mine--Interbedded black obsidian and light-gray as 400 feet (120 m) to east in Sevier County. tuff; conglomerate beds are poorly sorted and include clasts of Chinle Formation, Upper Member--Interbedded, varicolored sandstone, and mostly dolomites that range from light- to dark-gray, laminated Younger alluvial-fan deposits--Poorly sorted silt, sand, and pebble, Tcr Mount Baldy Rhyolite Member, Mount Belknap Volcanics--Resistant, the zeolite mineral clinoptilolite; may correlate with 24.6 Ma welded tuffs, quartzite, limestone, and dolomite up to boulder size; TRcu to massive, and include bioturbated, mottled dolomite and limestone Pk Qaf1 cobble, and boulder gravel deposited by streams, sheetwash, debris Basalt of Tabernacle Hill--Fine-grained holocrystalline basalt with felsite; felsite is devitrified and shows relict flow-layering, spherulites, Tmb (corrected) Leach Canyon Formation; exposed near Cove Fort where siltstone, mudstone, and shale; prone to slump; thickness 69 to 274 Qvb2 olivine and plagioclase in a groundmass made opaque by and lithophysae; obsidian commonly shows "snowflake" clusters; light-gray, flow-foliated, crystal poor, rhyolite lava flows and dikes; younger than 35 Ma and older than overlying 27 Ma Three Creeks feet (21-83 m). beds; the carbonates are generally medium-bedded to massive and flows, and flash floods on alluvial fans, and in canyons and mountain consist mostly of fine-grained mosaic of quartz and alkali feldspar, it overlies the tuff of Albinus Canyon and intertongues with Bullion Tuff; maximum thickness in map area about 600 feet (180 m). generally form cliffs except where tectonically brecciated; thickness Unconformity clinopyroxene aggregates formed by quenching of the lava during age about 2.2 to 2.6 Ma; maximum thickness about 500 feet (150 Canyon Volcanics; about 400 feet (120 m) thick. Chinle Formation, Shinarump Conglomerate Member--Interbedded P valleys; post-Bonneville shoreline in age; mostly 0 to 60 feet (0- with minor plagioclase, biotite, and hematite; deposited mostly TRcs up to about 2,400 feet (735 m). 18 m) thick, but may be up to 165 feet (50 m) thick along upper its eruption into Lake Bonneville; radiocarbon age 14,320 ± 90 yr m). Aurora Formation--Mostly poorly resistant, pale-gray, reddish-, and quartzite pebble conglomerate and white to brown, coarse sandstone Pq B.P.; maximum thickness about 200 feet (60 m). within Mount Belknap caldera; age uncertain; maximum exposed Volcanic rocks of Signal Peak--Gray, black, brown, reddish-brown, Tau yellowish-gray, bentonitic siltstone and claystone, with beds of thin- Ophir Formation--Upper part is medium- to thick-bedded limestone Sevier River. Rhyodacite of Coyote Hills--Light-gray to medium-brownish-gray Tsg and red, mostly crystal-poor, andesitic lava flows and flow breccia, that contains petrified wood; thickness 177 to 566 feet (54-172 m). - PERMIAN Tcr thickness about 2,600 feet (800 m) is in caldera that is mostly south to medium-bedded, medium-gray limestone, fine-grained sandstone, Cop with some shale interbeds, uppermost of which bears Ehmaniella Ppk Basalt of Pahvant Butte--Basalt flows of probable late and/or middle with less than 15 % phenocrysts of zoned plagioclase and sanidine and lesser volcanic mudflow breccia, densely welded ash-flow tuff, Moenkopi Formation--Interbedded brownish-red sandstone, siltstone, Older alluvial-fan deposits--Poorly sorted silt, sand, and pebble, Qvb3 of map area. and pebble to cobble conglomerate; contains upwardly increasing TRm trilobites; basal third is phyllitic quartzite, shale, and thin-bedded Qaf2 cobble, and boulder gravel deposited by streams, debris flows, and Pleistocene age; K-Ar dated as 0.031 to 0.22 Ma; 0 to about 100 in a microcrystalline matrix of plagioclase, quartz, sanidine, Fe-Ti and conglomerate; overlies tuff of Albinus Canyon northeast of shale, and gray limestone; minor cross-beds, mud cracks, and ripple Unconformity feet (0-30 m) thick. oxides, and zircon; age about 2.7 Ma; maximum thickness about Middle tuff member--Light-gray and tan, poorly welded, crystal poor, amounts of fine-grained rhyolitic ash and reworked volcanic detritus; marks are common; fossil brachiopods and ammonoids abundant limestone bearing Glossopleura trilobites; both parts form slope- flash floods on alluvial fans, and in canyons and mountain valleys Tmm intracaldera rhyolite ash-flow tuff; lithologically similar to, and, Annabella; vent facies rocks and lesser alluvial-fan facies rocks coarsens to southwest; 38 to 40 Ma age implies volcanic source in ledge topography; thickness about 850 feet (260 m). above the Bonneville shoreline; includes colluvium in canyons and Basaltic andesite of Cedar Grove--Dark-gray to black, porphyritic 650 feet (200 m). erupted from shield volcano complex in northern Sevier Plateau; locally; maximum thickness 1,876 feet (572 m). IPc Qcg locally, continuous across Mount Belknap caldera margin into upper west-central Utah; maximum thickness about 1,200 feet (360 m) Tintic Quartzite--White to brownish-orange-weathering, vitreous mountain valleys; on flanks of Mineral Mountains is mostly pea- basaltic andesite with phenocrysts of plagioclase, clinopyroxene, Toc Oak City Formation--Sandy, bouldery gravel; poorly to well cemented; as much as 2,100 feet (650 m) thick. Permian strata, undivided--On cross sections only; for included units -Ct PENN. part of Joe Lott Tuff Member (19 Ma; Tmj); thickness to south up southeast of Kanosh thinning to 550 feet (170 m) near Richfield, P IPM Unconformity sized grus, locally including larger clasts and significant eolian silt; hypersthene, magnetite, and olivine in a felted matrix; maximum forms dissected alluvial apron on west side of Pahvant Range; bed see correlation chart and descriptions. quartzite, with a few quartzite pebble conglomerate beds; commonly to about 1,640 feet (500 m), but thinner in map area. Basaltic andesite, Antimony Tuff, and tuff of Albinus Canyon, and to less than 200 feet (60 m) near Cove Fort. sheared and fractured; estimated thickness 3,300 feet (1,000 m). mostly pre-Lake Bonneville in age, but locally includes younger thickness about 200 feet (60 m); age about 0.3 Ma. of Cudahy Mine pumice, K-Ar dated as 2.6 Ma, is within upper Taa undivided--Only used in hills southeast of town of Joseph where Kaibab Limestone--Gray, medium-crystalline, medium-bedded, Mr material; up to 200 feet (60 m), or more, in thickness. Rhyolite dome of White Mountain--Black obsidian and devitrified Oak City Formation in map area, so upper Pliocene and Miocene(?) Lower heterogeneous member--Gray rhyolite volcanic domes, lava Crazy Hollow Formation--Mostly moderately resistant, brownish- Pk CAMBRIAN STRATA IN THE CRICKET AND MINERAL Qvr Tmh flows, and subordinate ash-flow tuff and fluvial volcanic sandstone; individual units (Tba, Tda, Tac) cannot be separated. Tch orange to brownish-red, very thin- to thin-planar-bedded, fine- dolomitic limestone; locally sandy and contains abundant brown

MISS. 4 age; base of formation not exposed; estimated thickness as much MOUNTAINS Alluvium and colluvium, undifferentiated--Mixed alluvial and felsite with spherulites and lithophysae; about 120 feet (40 m) high; Basaltic andesite lava flows--Resistant, dark-gray and black, locally chert; thickness in map area 497 (subsurface) to 1,160 feet (152- Unconformity Qac age about 0.4 Ma. as 2,000 feet (600 m). vent probably located just south of map area, northwest of Marysvale; Tba grained sandstone, siltstone, and mudstone; contains 25 % interbeds Upper Cambrian strata, undivided--On cross sections only; for colluvial deposits that consist of fluvially reworked coarse-grained about 230 feet (70 m) thick. vesicular and amygdaloidal, crystal-poor, basaltic andesite lava of pale-grayish-orange, lenticular, channel sandstone; black chert 353 m); lower third of this map unit is likely Toroweap Formation -Cu Dc colluvium and/or alluvium with a significant colluvium component; Basaltic andesite of Cove Fort--Dark-gray to black, vesicular to dense Sevier River Formation--In northeast corner of map area in Sevier flows; exposed in southeast Pahvant Range; intertongued with equivalent. included units see correlation chart and descriptions. Qcf Tse County, light-gray, yellowish- or greenish-gray, poorly to moderately Fine-grained granite--Resistant, gray and greenish-gray, fine-grained pebbles in few thin conglomerate lenses are diagnostic for formation; also includes talus; generally 0 to 50 feet (0-15 m) thick, but may basaltic andesite containing small phenocrysts of plagioclase, Tmf Antimony Tuff and tuff of Albinus Canyon; may be part of unit Tsg 350 feet (107 m) thick west of Richfield, thinning to zero a short Queantoweap Sandstone--Pinkish- or light-brownish-gray, fine- - Notch Peak Formation--Medium-dark-gray, massive limestone; only Unconformity be thicker locally. pyroxene, magnetite, olivine, and sparse corroded quartz in a felted sorted mudstone, sandstone, conglomerate, and carbonaceous granite and granodiorite stock and associated dikes; cuts the Central Pq OCn basal 100 feet (30 m) preserved in map area. intrusion (Tci), but is also within and may be a late phase of the with vents east of Sevier Valley; maximum thickness about 500 feet distance to southwest. grained, cross-bedded sandstone; locally poorly cemented; thickness to glassy matrix; age about 0.5 Ma; maximum thickness about 800 mudstone that is probably more than 600 feet (180 m) thick. South (150 m). Orr Formation, upper members, undivided--In descending order, the D Dg Mass movements, undivided--Masses of soil, sand, rock, and boulders Monroe Peak caldera; hosts uranium-bearing veins in Central mining Green River Formation--Yellowish-gray to pale-brown, cherty, algal, 817 feet (249 m). - Qmu that have moved downslope under the influence of gravity; includes feet (250 m). of Richfield in Sevier County, mostly moderately indurated, pale Tg Cou following members constitute this combined unit: Sneakover brownish- or reddish-gray sandstone, pebble to boulder conglomerate, area, just south of map area; age 20-21 Ma. Antimony Tuff Member, Mount Dutton Formation--Resistant, mostly and oolitic limestone and dolomite, calcareous, fine-grained Pakoon Dolomite--Medium- to light-gray, sandy dolomite Ds soil creep, slopewash, talus, and fan alluvium, and locally slides Rhyolite of Mineral Mountains, dome--Tan perlitic glassy dome, Tda red, densely welded, crystal-poor, trachytic ash-flow tuff; contains Ppk characterized by small, white calcite blebs; basal 50 feet (15 m) is Limestone Member, 100 feet (30 m) thick; Corset Spring Shale

DEVONIAN Qvrd mudstone, and siltstone of fluvial and, locally, lacustrine origin; Crystal-rich volcanic domes and plugs--Resistant, tan, pink, and gray, sandstone, and greenish-gray shale; about 800 feet (245 m) partial and slumps; 0 to 100 feet (0-30 m) thick. Includes dissected older commonly pumiceous and brecciated and containing scattered black Tmi medium-grained phenocrysts of plagioclase, sanidine, and minor thickness exposed in northeast map area and thins to absence a chert pebble conglomerate; thickness 445 feet (136 m). Member, 40 feet (12 m) thick; Johns Wash Limestone Member, 100 Dsy deposits on and near Bull Claim Hill southeast of Richfield. obsidian fragments; northernmost of several similar domes in the volcanic clasts are common in south, decreasing northward; local flow-foliated, crystal-rich rhyolitic domes and intrusive feeders for feet (30 m) thick; and Candland Shale Member, 165 feet (50 m) interbedded tuffs and intertongued yield K-Ar ages of 5.6 domes; commonly contain phenocrysts of sanidine, plagioclase, pyroxene and Fe-Ti oxides, and drawn-out pumice lenticules; southwest of Richfield. Pennsylvanian and Mississippian strata, undivided--On cross sections Mineral Mountains; age 0.54 Ma. interlayered with volcanic rocks of Signal Peak; K-Ar age 25.4 Ma; IPM thick. Unconformity Mass movements, talus--Poorly sorted, angular boulders with minor to 13.6 Ma; exposed thickness at least 330 feet (100 m), but total biotite, hornblende, quartz, and minor apatite, sphene, and magnetite Flagstaff Formation--Interbedded pinkish-weathering, freshwater only; for included units in footwall see correlation chart and Qmt fine-grained interstitial material on and at the base of steep slopes Rhyolite of Mineral Mountains, tuff--White to tan, poorly consolidated maximum thickness 200 feet (60 m). Orr Formation, Big Horse Limestone Member--Pinkish- to dark-gray Qvrt thickness may be up to 1,000 feet (300 m). in a devitrified or glassy matrix; present in southeast Antelope Range Tf limestone, sandstone, siltstone, mudstone, and conglomerate; typically descriptions. -Cob SIL. SO SOu in the Pahvant Range; only the largest deposits can be shown at tuff vented from nearby rhyolite dome in Mineral Mountains; less quadrangle; age about 21 Ma; maximum dome height about 820 Tuff of Albinus Canyon--Red to gray, crystal-poor, densely welded, bioturbated; in southwestern Pahvant Range conglomerate is Callville Limestone--Medium- to light-gray, fine- to medium-bedded, limestone with dolomitic "algal" stromatolites and boundstone in map scale; thickness less than 100 feet (30 m). than 100 feet (30 m) thick; probably same age as nearby rhyolite Basalt flows in northern Tushar Mountains--Dark-gray, black, and Tac IPc the middle; bioclastic beds contain Crepicephalus trilobites; thickness Tb red, locally vesicular and amygdaloidal olivine basalt and basaltic feet (250 m). trachytic ash-flow tuff; contains few phenocrysts; flow structures dominant lithology exposed and strata may grade into upper North medium- to thick-bedded, cherty limestone and dolomite with a few Unconformity Mass movements, slides and slumps--Volcanic and sedimentary rock dome (Qvrd). and lineate vesicles are characteristic; has several thin cooling units, 656 feet (200 m). Qms andesite lava flows, flow breccia, and cinder cones, scoria, and ash; Horn Formation; 300 to 585 feet (90-190 m) thick in Cricket thin pinkish-gray sandstone beds; thickness 538 feet (164 m). masses that have slumped and slid downslope, chiefly on softer, Basalt of Kanosh--Red-weathering, vesicular basalt with large Volcanics of Monroe Peak Caldera--Includes lava flows of varied locally separated by thin beds of volcanic mudflow breccia, Mountains; maximum thickness in Pahvant Range is about 3,500 Redwall Limestone--Upper third is interbedded calcareous sandstone, Middle Cambrian strata, undivided--On cross sections only; for Oe Qvb4 not isotopically dated within map area, but similar basalts K-Ar Mr -Cm O underlying rocks; small isolated slides or slumps are present in plagioclase phenocrysts and small phenocrysts of olivine and dated as at least 10.9 to 12.9 Ma, and other basalts are as young as composition, Osiris Tuff, intracaldera intrusions, airfall tuff, and conglomerate, and sandstone in map area; lithologically similar to feet (1,070 m), thinning to nothing east of Dog Valley in southern limestone, and dolomite; middle part is gray, cherty, fossiliferous included units see correlation chart and descriptions. Op many mountainous areas, but are too small to show at 1:100,000 clinopyroxene in a microcrystalline matrix; age 0.67 Ma; locally 7.4 Ma; maximum thickness about 425 feet (130 m). fluvial and lacustrine sedimentary rocks deposited in Monroe Peak overlying Antimony Tuff Member of the Mount Dutton Formation; Pahvant Range. In most of Pahvant Range divided into six informal limestone; basal one-quarter is medium-gray interbedded dolomite Wah Wah Summit Formation and Trippe Limestone, undivided-- stands as much as 300 feet (90 m) above the desert floor west of caldera after subsidence. age 25.3 Ma; maximum thickness about 650 feet (200 m). -Cwt ORDOVICIAN scale; up to 250 feet (75 m) thick. members described below: Wah Wah Summit Formation includes a white dolomite and limestone - - Rhyolite of Gillies Hill--Lava flows and domes of light-gray to white, and limestone; thickness 1,545 feet (471 m). OC n C a Eolian dunes--Chiefly parabolic, longitudinal, and barchan sand Kanosh. Trg Intracaldera rocks, undivided--Mapped only where hydrothermal Crystal-poor dacitic lava flows--Moderately resistant, light-gray, Upper white member - Pale-gray, pale-purplish-gray or pale-yellowish- sequence that makes up the upper third of the formation, and a dark- Qed flow-layered, dense to vesicular rhyolite; aphyric to porphyritic, Tmpu Tcp Tfuw D Devonian strata, undivided--On cross sections only; for included - - dunes that are active and not stabilized by vegetation; composed Basalt of Beaver Ridge--Consists of older flow series, dated at 0.9 alteration precludes identification of individual units described light- to medium-green, and light-reddish-gray, locally vesicular or gray, calcareous mudstone, siltstone and sandstone, and sandy units in footwall see correlation chart and descriptions. gray, ledge- and cliff-forming, carbonate sequence below; thickness C u C ou Qvb4 with phenocrysts of plagioclase and biotite; located south-southwest -C ox of well-sorted, fine-grained quartz sand; also gypsum dunes in the Ma, of diabasic basalts about 80 feet (24 m) thick, and younger of Cove Fort; age about 9 Ma; more than 1,000 feet (300 m) high. below. amygdaloidal, aphanitic dacitic lava flows and red volcanic mudflow limestone; less resistant than other Flagstaff members, forms a broad 575 to 640 feet (175-195 m). Trippe Limestone includes the Fish series, dated at 0.5 Ma, of similar composition but fine-grained to breccia; exposed northeast of Annabella underlying tuff of Albinus Cove Fort Quartzite--Yellowish-gray, medium-grained quartzite with Springs Shale Member, about 100 feet (30 m) thick, beneath which -C ob vicinity of White Mountain and silt dunes downwind from playas Intracaldera intrusions, undivided--Resistant, tan, light-gray, and slope with a few ledges; commonly covered by rubble from overlying Dc thin interbeds of dolomitic quartzite in middle third; forms prominent -C um and blowouts; 3 to 35 feet (1-11 m) thick. glassy, and about 120 feet (37 m) thick. Tuff of Holden--White tuff interbedded with pink to white, shaly Tmpi Canyon and overlying Three Creeks Tuff; 100 to 160 feet (30-50 the lower member consists of alternating dark-gray, ledge-forming

- Tht light-green, monzonite porphyry and quartz monzonite porphyry um C siltstone, clay, grit, and gravel exposed east of Fillmore; age probably formations; 170 to 185 feet (51-56 m) thick. ledges; thickness 82 to 160 feet (25-49 m). -C wt Eolian and alluvial deposits, mixed--Interbedded and mixed Basalt of Mineral Mountains--Dark-gray, vesicular basalt that forms intruded into late intracaldera deposits and the Osiris Tuff; age about m) thick. limestone, and light-gray, laminated, slope-forming, dolomitic Qea Qvb 10.5 to 10.8 Ma; may be as much as 200 feet (60 m) thick. Upper red member - Interbedded dark-reddish-brown, calcareous Guilmette Formation--Dark-gray, medium-grained, medium-bedded windblown and alluvial sand and silt in the volcanic terrain west 4 two spatter cones and flow remnants on northeast end of the Mineral 21-22 Ma. Tfur mudstone, siltstone, and sandstone, and local conglomerate; forms Dg boundstone, 660 to 760 feet (200-230 m) thick. Combined map -C cm Rhyolite porphyry dikes--Speckled gray rock with about 10 % dolomite with a few interbeds of brown-weathering quartzite; unit about 1,420 feet (433 m) thick; structurally thinned and - of Cove Fort; up to 20 feet (6 m) thick. Mountains; dated at 0.9 Ma; cone is about 200 feet (60 m) high. Trd Central intrusion--Resistant, gray and green, porphyritic to locally Bullion Canyon Volcanics--Widely distributed, heterogeneous, a distinct red, ledgy slope with local cliffs; less than 50 to at least C m phenocrysts each of K-feldspar and quartz, and a trace to 3 % biotite Tci Tbc thickness 575 feet (175 m). identification uncertain in Mineral Mountains. -C w Playa mud--Laminated, silty, fine sand, silt, and clayey silt infused Basaltic andesite of Red Knoll--Dark-gray to black, dense to vesicular, equigranular quartz monzonite to monzonite stock, with a fine- varicolored, volcanic mudflow breccia, lava flows, flow breccia, 162 feet (15-49+ m) thick; thins to northeast. Qpm Qrk in a matrix of granophyric intergrowths; age about 11-12 Ma; dikes Simonson Dolomite--Light-brownish-gray, medium- to coarse- Limestone of Cricket Mountains--Interbedded, dark-gray limestone, -C op with various salts, gypsum, and calcium carbonate; thickness porphyritic basaltic andesite to latite lava flow with a blocky grained chilled margin; distinct from other intracaldera intrusions; ash-flow tuff, and fluvial volcanic conglomerate and sandstone; Middle white member - Interbedded pale-gray, pale-yellowish-gray Ds CAMBRIAN - -C dh cut granodiorite stock (Tgm) and quartz monzonite (Tqm) in Mineral grained, thin-bedded dolomite; thickness 185 feet (56 m). Ccm - Tfmw brownish-gray dolomitic limestone, and light-gray, laminated, op C probably 20 feet (6 m) or less. scoriaceous surface; contains 30 to 45 % phenocrysts, mostly Mountains. age about 22 Ma. erupted and eroded from several clustered stratovolcanoes; lava or pale-pinkish-gray, calcareous sandstone, sandy limestone, and labradorite and pyroxene, in glassy to finely crystalline matrix; flows are mostly crystal-rich dacite with some fine-grained, crystal- Sevy Dolomite--Very-light-gray, fine-grained, medium-bedded, dolomitic boundstone; forms cliffs and ledges; thickness 1,970 feet - Spring travertine--Cellular to dense and banded, spring-deposited Sedimentary rocks--Mostly poorly resistant, tan, gray, yellow, brown, limestone cliffs and ledges, with minor sandy mudstone slopes; Dsy C p - Qst Intrusion and gneiss complex--Tertiary dikes and other intrusive Tmps clayey dolomite; rare fossil fish fragments found in Sevy strata in (600 m). -C l -C t C t travertine in southern Pahvant Valley and in White Sage Flat, located southwest of Cove Fort and overlies basaltic andesite of Tp-Cg pink, and green, thin- to medium-bedded, fine- to coarse-grained poor, black andesite, as well as rhyodacite and quartz latite lava lower part mostly gypsiferous mudstone that grades to southwest Crater Knoll; vent lies a mile (1.6 km) south of map area; maximum bodies interleaved with Precambrian(?) gneisses; individual units flows; age at least 30 to 22 Ma; maximum thickness at least 5,000 Dog Valley quadrangle; thickness 710 feet (217 m). Whirlwind Formation-Light-olive-gray shale interbedded with thin- -C pm siliceous spring deposits near Roosevelt Hot Springs in Beaver cannot be shown at map scale; age of youngest dikes (Trd) 11 Ma; tuffaceous sandstone and airfall tuff, with minor intertongued crystal- into mostly limestone and sandstone; 515 to 580 feet (157-177 m) -Cw County, and calcareous spring deposits southeast of Joseph and east thickness less than 200 feet (60 m). poor and crystal-rich lava flows, siltstone, and conglomerate; feet (1,500 m) in Sevier County. thick. Silurian and Upper Ordovician strata, undivided--On cross sections bedded, nodular limestone bearing coquinas of the trilobite exposed on west side of Mineral Mountains. SO only; for included units see correlation chart and descriptions. Major unconformity of Monroe in Sevier County; 0 to 90 feet (0-30 m) thick. Basaltic andesite of Crater Knoll--Dark-gray to black, porphyritic primarily fluvial but locally lacustrine deposits; commonly altered Monzonitic/latitic intrusions in Bullion Canyon Volcanics--Dark- to Middle red member - Interbedded reddish-brown sandstone, siltstone, Ehmaniella; forms recessive slopes; thickness 200 to 265 feet (60- Qck basaltic andesite lava flows similar to Qrk; 40 to 45 % phenocrysts, Microdiorite dikes--Thin, resistant, dark-green to black dikes with and silicified; maximum thickness 200 feet (60 m). Tbci light-gray, tan, and brown, crystal-rich monzonite and quartz Tfmr Laketown and Fish Haven Dolomites, undivided--Dark-gray, cherty 80 m).

- Altered material--White, porous aggregates of opaline silica, gypsum, Tdd and mudstone; minor conglomerate beds contain mostly quartzite pC pC- g subdiabasic texture; contain plagioclase (andesine), hornblende, SOu Qsa native sulfur, and anhydrite, and remnant quartz and cristobalite mostly labradorite and pyroxene; glassy to finely crystalline matrix, Lava flows of Monroe Peak--Mostly resistant, gray, pink, and dark- monzonite and strongly porphyritic latite and quartz latite in small and carbonate clasts less than 6 inches (15 cm) in diameter; forms dolomite with stromatolites and rugose corals; thickness 566-1,000 Dome-Chisholm-Howell Formations, undivided--Listed from top containing microlites of plagioclase, pyroxene, olivine(?), and actinolite, and biotite, with minor K-feldspar, and 1 to 3 % each Tmpl plutons and plugs; probably solidified magma sources of other rocks feet (173-300 m). -Cdh downward. Dome Limestone is gray, massive, forms cliffs, and produced by acid leaching; related to geothermal system; located sphene, Fe-Ti oxides, apatite, orthopyroxene, and alteration minerals; green, vesicular and amygdaloidal, generally crystal-rich rhyodacitic cliffs and ledges typically 10 to 50 feet (3-15 m) high separated by near Cove Fort in Holocene(?) and likely Pleistocene alluvial fans opaque minerals; vent is 2 miles (3 km) south of map area southwest lava flows; includes minor crystal-poor lava flows, flow breccia, in the Bullion Canyon Volcanics; ages cluster about 23 Ma; near steep slopes; about 600 feet (180 m) thick. Middle and Lower Ordovician strata, undivided--On cross sections is 230 to 330 feet (70-100 m) thick. Chisholm Formation consists of Cove Fort; age 1.0 Ma; thickness in map area less than 100 feet cut granite dikes (Tgd) and quartz monzonite (Tqm) in Mineral Cove Fort intrusions cut Three Creeks Tuff (27 Ma) and are O only; for included units see correlation chart and descriptions. of lower and upper shales, bearing the trilobite Glossopleura, and bedrock; only the largest area, exposed in a pit, is mapped; up Mountains, so less than 18 Ma. volcanic mudflow breccia, fluvial sandstone, and airfall tuff; K-Ar Lower white member - Interbedded pale-gray to pale-reddish-gray, Note: “Pavant” and “Pahvant” are both used in this (30 m). unconformably overlain by Osiris Tuff (23 Ma). Tflw separated by dark-gray, oncolitic limestone; 165 to 265 feet (50-80 to 105 feet (33 m) thick in this pit. age 21.3 Ma; maximum exposed thickness 500 feet (150 m); includes calcareous sandstone, sandy limestone, and pale-purplish-gray, silty Oe Eureka Quartzite--Light-pinkish-gray, vitreous quartzite with thin- document. “Pahvant” is now the accepted spelling for Basalt of Black Rock--Dark-gray, vesicular basalt composed of about Granite dikes--Includes fine-grained, leucocratic, and biotite-rich dacite of Big Flat of Cunningham and others (1983). Metamorphosed rock--Calc-silicate hornfels and quartzite at contact bedded fucoidal sandstone and shale in lower half; forms ledges; m) thick. Howell Limestone forms cliffs that are light-gray in the Glacial till--Unsorted mixtures of clay, silt, sand, and angular pebbles, Qvb Tgd varieties, listed youngest first from intrusive relations; contain about Tm to sandy mudstone; white, clayey limestone beds, locally as thick geographic features. “Pavant” usage is for geologic Qgt 5 40% small zoned plagioclase phenocrysts, with lesser phenocrysts with quartz monzonite of unit Tbci (age about 23 Ma); thought to thickness 150 to 180 feet (45-55 m). upper third and dark-gray below; thickness about 300 to 360 feet cobbles, and boulders in Pahvant Range; includes lateral and other 54 % K-feldspar, 27 % quartz, 9 to 16 % plagioclase, and 3 to 7 % Tmpa Volcanic rocks of Sage Flat--Mostly resistant, medium- to dark-gray as 150 feet (45 m) cap the member; less resistant calcareous mudstone, features named in publications. moraines and outwash on Sevier Plateau; probably late Wisconsin of clinopyroxene, olivine, and Fe-Ti oxides; age about 1.0-1.3 Ma; or black, crystal-poor, andesitic lava flows; includes minor volcanic be metamorphosed Toroweap Formation (Lower Permian), siltstone and sandstone beds comprise middle part; resistant, blocky Pogonip Group--Medium-gray, medium- to thin-bedded limestone (90-110 m). Peasley Limestone is lateral equivalent of Chisholm maximum thickness about 200 feet (60 m). biotite; biotite-granite dikes are medium grained and older than the interbedded dolomite, limestone, and sandstone. Op in Mineral Mountains, where entire map unit is structurally thinned. (Pinedale) in age; 0 to 200 feet (0-60 m) thick. syenite (Tsm); dikes intrude Tqm in Mineral Mountains, so less mudflow breccia, and fluvial sandstone and conglomerate; about limestone beds in lower part are up to 200 feet (60 m) thick; total and intraformational conglomerate, locally cherty or fine sandy; The views and conclusions contained in this document Andesite of Beaver Ridge--Dark-gray, crystal-poor andesite 200 feet (60 m) thick. Three Creeks Tuff Member, Bullion Canyon Volcanics--Resistant, Lower Cambrian strata, undivided--On cross sections only; for Underflow-fan deposits--Thin-bedded to laminated, calcareous silt Qva than 18 Ma. Tbct thickness 0 to about 700 feet (0-215 m), thinning to southwest. upper 89 feet (27 m) includes interbeds of olive shale that contains -Cl are those of the authors and should not be interpreted Qdf 5 characterized by small microlites of resorbed quartz, plagioclase, light-gray to light-brown, crystal-rich, moderately to densely welded, orthid brachiopods; total thickness 1,125 feet (343 m). included units see correlation chart and descriptions. with minor interbedded very fine sand in thin beds; deposited in Syenite of Mineral Mountains--Light-gray, coarse- to medium-grained Lava flows of Monkey Flat Ridge--Moderately resistant, reddish- Lower red member - Interbedded reddish sandstone, siltstone, as necessarily representing the official policies, either the Lake Bonneville delta of the Beaver River south of Borden; 0 and pyroxene crystals; age about 1.5 Ma; thickness about 200 feet Tsm Tmpf brown, gray and green, locally vesicular or amygdaloidal dacitic to dacitic ash-flow tuff containing 40 to 60 % phenocrysts, mostly Tflr mudstone, conglomerate; forms cliffs and steep slopes; less than Upper Cambrian strata, undivided--On cross sections only; for Pioche Formation--Mostly interbedded dark-brown quartzite and (60 m). syenite stock; weathers to grus; contains microcline, lesser plagioclase plagioclase, with lesser hornblende, biotite, and quartz, and traces -Cu -Cp dark-greenish-gray, phyllitic siltstone characterized by abundant expressed or implied, of the U.S. Government. to more than 30 feet (0-10+ m) thick. and quartz, minor biotite and sphene, and accessory Fe-Ti oxides, rhyodacitic lava flows and minor fluvial sandstone and conglomerate; 200 feet (60 m) thick in southwesternmost exposures to about 1,300 included units see correlation chart; may also include Middle Fine-grained lacustrine deposits of Sevier Desert--Brown and light- maximum exposed thickness 500 feet (150 m). of sanidine and Fe-Ti oxides; erupted from caldera north of I-15 trace fossils; upper tenth includes beds of orange-weathering Deltaic sand and gravel--Silty, fine- to coarse-grained sand and gravel QTlf apatite, hornblende, and zircon; cut by most granite dikes, intrudes feet (400 m) east of Kanosh to about 600 feet (180 m) thick on Cambrian strata. Although this product represents the work of professional Qdg deposited by the Beaver River in Lake Bonneville and then distributed olive-gray, calcareous, lacustrine silt and silty clay with minor sand; Lava flows of Bagley Meadows--Resistant, light- to medium-gray and east of Cove Fort; age 27 Ma; maximum thickness about 720 Pahvant Range crest east of Fillmore. Ajax(?) Dolomite--Highly fractured, nondescript dolomite exposed dolomite; thickness about 800 feet (245 m). unit Tqm in Mineral Mountains, so less than 18 Ma. Tmpb feet (220 m). - scientists, the Utah Department of Natural Resources, by waves and currents; 0 to 24 feet (0-7 m) thick. offshore to deep-water sediments; Pliocene to middle Pleistocene and pink, locally vesicular and amygdaloidal, locally flow-foliated, Breccia of Cat Canyon--Coarse, recemented breccia of gray, Cambrian Ca in Baker Canyon; likely part of Ajax Dolomite. Prospect Mountain Quartzite--Grayish-pink, vitreous quartzite ranging in age; 0 to 872 or more feet (0-255+ m) thick; contains sinkholes. Quartz monzonite of Mineral Mountains--Speckled gray, biotite-rich, Tbr -Cpm from very fine- to coarse-grained with some thin, quartzite-pebble Utah Geological Survey, makes no warranty, expressed Lacustrine gravel--Silty, fine- to coarse-grained sand and gravel in Tqm coarse-grained quartz monzonite that forms massive light-brownish- crystal-rich, dacitic lava flows or a volcanic dome; contains carbonate rocks in Cricket Mountains; likely an indurated talus or Qlg Quaternary-Tertiary alluvial-fan deposits--Poorly sorted silt, sand, phenocrysts of plagioclase, pyroxene, sanidine, olivine, and Fe-Ti Quartz-latite volcanic dome and rhyodacite flow--Resistant, gray, PAVANT THRUST SHEET conglomerate beds; forms ledges and cliffs; at least 4,000 feet (1,200 or implied, regarding its suitability for a particular use. shore zone deposits of Lake Bonneville; 0 to 30 feet (0-9 m) thick. QTaf gray stock exposed extensively in the central Mineral Mountains rubble, rather than of tectonic origin; as much as 165 feet (50 m) and gravel, including boulders, in Dog Valley, upper Cove Creek, oxides; maximum thickness 650 feet (200 m). Tql crystal-rich, quartz latite volcanic dome and overlying dark-gray, thick. Laketown and Fish Haven Dolomites, undivided--Interbedded light- m) thick. The Utah Department of Natural Resources, Utah Lacustrine sand--Fine- to coarse-grained sand, marly sand, and south of the Millard County line; age about 18 Ma. SOu Qls and in northeast corner of map area; locally has a calcic soil with Osiris Tuff, intracaldera facies--Soft to resistant, orange and tan, crystal-poor, rhyodacitic lava flow in Joseph Peak quadrangle; age North Horn Formation--Predominantly yellowish-gray sandstone gray and medium dark-gray to brownish-gray, medium- to thick- Banded gneiss--Light bands are composed of quartz and K-feldspar Geological Survey, shall not be liable under any pebbly sand deposited in shore zone of Lake Bonneville as beaches, Diorite of Mineral Mountains--Medium-grained, equigranular, biotite Toi TKn p-Cg spits, and offshore bars; 0 to 30 feet (0-9 m) thick. a stage IV carbonate morphology (so early Pleistocene age) near Tdm densely welded ash-flow tuff and lava flows(?); confined to source uncertain; maximum thickness about 650 feet (200 m). with interbeds of siltstone, mudstone, conglomerate, and limestone; bedded dolomite; brown chert bands in middle of exposed strata, with minor biotite and plagioclase; dark bands are mostly biotite, circumstances for any direct, indirect, special, incidental, the top of the deposit; 0 to 300 feet (0-90 m), or more, thick. hornblende diorite; contains small apatite and sphene crystals; plagioclase, and quartz with minor hornblende and K-feldspar; Fine-grained lacustrine deposits--Tan to light-gray, calcareous silts Monroe Peak caldera and includes caldera collapse breccia; similar Volcanic rocks of Wales Canyon--Moderately resistant, red, moderately as much as about 2,500 feet (760 m) thick in Pahvant Range east so Laketown may or may not be exposed; incomplete 200 foot (60 or consequential damages with respect Qlf exposed on northwest flank of Mineral Mountains; age between 18 Tw m) thickness exposed in upper Corn Creek Canyon. accessory minerals are apatite and rounded zircon; present in Mineral that are deep-water sediments of Lake Bonneville; locally includes Tertiary volcanic and sedimentary units, undivided--On cross sections and 25 Ma based on intrusive relationships with Tqm and Tgm. to outflow facies but generally altered to clay by intracaldera crystal-rich, intermediate-composition lava flows and densely welded of Fillmore, but absent from about Meadow Creek southward; either to claims by users of this product. Tvs only; for included units see correlation chart and descriptions. ash-flow tuff; exposed near Cove Fort; overlies volcanic rocks of Mountains; age 1,750 Ma.