U.S. Department of the Interior National Park Service Natural Resource Stewardship and Science Directorate Geologic Resources Division Glen Canyon National Recreation Area GRI Ancillary Map Information Document Produced to accompany the Geologic Resources Inventory (GRI) Digital Geologic Data for Glen Canyon National Recreation Area glca_geology.pdf Version: 9/29/2011 I Glen Canyon National Recreation Area Geologic Resources Inventory Map Document for Glen Canyon National Recreation Area Table of Contents Geolog.i.c. .R...e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .M...a..p.. .D..o..c..u..m...e..n..t....................................................................... 1 About th..e.. .N...P..S.. .G...e..o..l.o..g..i.c. .R...e..s.o..u..r.c..e..s.. .I.n..v.e..n..t.o..r..y. .P...r.o..g..r.a..m........................................................... 2 Map Un.i.t. .L..i.s..t.......................................................................................................................... 4 Map Un.i.t. .D..e..s..c..r.i.p..t.i.o..n..s............................................................................................................. 8 Man ma..d..e.. .d..e..p..o..s..i.t.s....................................................................................................................................................... 8 Qfd - .A...r.t.i.f.i.c..ia..l. .f.i.l.l .a..n..d.. .d..i.s..t.u..r.b..e..d.. .a..r..e..a..s.. .(.H..o..l.o..c..e..n..e..).............................................................................................. 8 Qfdm .-.. .C..o..n..c..r.e..t.e.. .f..il.l. .in.. .G...l.e..n.. .C..a..n..y..o..n.. .D..a..m... .(.H...o..lo..c..e..n..e..).......................................................................................... 8 Alluvial. .d..e..p..o..s..i.t.s............................................................................................................................................................ 8 Qa - U..n..d..i.f.f.e..r..e..n..t.ia..t.e..d.. .a..l.l.u..v..ia..l. .d..e..p..o..s..i.t.s.. .(.l.a..t.e.. .P..le..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e.. .[.m...o..s..t.ly.. .l.a..t.e.. .H..o..l.o..c..e..n..e..].)............................ 8 Qal - A...l.lu..v..i.a..l. .r.i.v..e..r. .a..n..d.. .m...a..jo..r.. .s..t.r.e..a..m... .d..e..p..o..s..it.s.. .(..la..t.e.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e.. .[.m..o..s..t.l.y.. .l.a..t.e.. .H..o..l.o..c..e..n..e..].)................ 8 Qal1 - Young alluvial river and major stream deposits (late Pleistocene to Holocene [mostly late Holoc.e..n..e..].)........................................................................................................................................................... 9 Qat - .U..n..d..i.f.f.e..r..e..n..t.ia..t.e..d.. .a..l.l.u..v..ia..l. .r.i.v..e..r. .a..n..d.. .s..t.r..e..a..m.. .t.e..r..r.a..c..e.. .g..r.a..v..e..l. .d..e..p..o..s..i.t.s.. .(.e..a..r.l.y.. .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..).......... 9 Qaty -.. .Y..o..u..n..g.. .a..l.l.u..v..ia..l. .r.i.v..e..r. .a..n..d.. .s..t.r..e..a..m.. .t.e..r..r.a..c..e.. .g..r.a..v..e..l. .d..e..p..o..s..i.t.s.. .(.l.a..t.e.. .P..le..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)......................... 9 Qat2-.1..3.. .-. .L..e..v..e..l. .2.. .t.o.. .1..3.. .a..ll.u..v..i.a..l .r..iv..e..r.. .a..n..d.. .s..t.r.e..a..m... .t.e..r.r.a..c..e.. .g..r..a..v..e..l .d..e..p..o..s..i.t.s.. .(.e..a..r..ly.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)....... 9 Qatg8 - Level 8 mixed alluvial river terrace and locally derived gravel deposits (middle Pleistocene; 325-.6..0..0..k..a..)........................................................................................................................................................ 10 Qatg9 - Level 9 mixed alluvial river terrace and locally derived gravel deposits (middle Pleistocene; 400-.7..1..0..k..a..)........................................................................................................................................................ 10 Qatg10 - Level 10 mixed alluvial river terrace and locally derived gravel deposits (early to middle Pleis.t.o..c..e..n..e..;. .4..7..5..-.8..2..5..k..a..).................................................................................................................................... 10 Qatg12 - Level 12 mixed alluvial river terrace and locally derived gravel deposits (early to middle Pleis.t.o..c..e..n..e..;. .6..2..5..k..a..-.1....0..5..M...a..).............................................................................................................................. 10 Qag,. .Q...a..g..m...,. .Q..a..g..o.. .-.. .L..o..c..a..ll.y.. .d..e..r.i.v..e..d.. .a..l.lu..v..i.a..l. .g..r.a..v..e..l. .d..e..p..o..s..it.s.. .(..e..a..r.l.y.. .P..le..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)......................... 11 Mixed. .e..n..v..i.r.o..n..m...e..n..t. .d..e..p..o..s..it.s........................................................................................................................................ 11 Qac,. .Q...a..c..o.. .-. .A...l.lu..v..i.a..l. .a..n..d.. .c..o..ll.u..v..i.a..l .d..e..p..o..s..i.t.s.. .(.m...i.d..d..le.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..).................................................. 11 Qae,. .Q...a..e..2..,. .Q...a..e..3..,. .Q..a..e..o.. .-.. .A..l.l.u..v..ia..l. .a..n..d.. .e..o..l.ia..n.. .d..e..p..o..s..i.t.s.. .(.e..a..r..ly..(..?..). .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..).............................. 12 Qaec.. .-.. .A..l.l.u..v..ia..l. .f.a..n.. .a..n..d.. .s..t.r..e..a..m..,. .e..o..l.i.a..n..,. .a..n..d.. .c..o..ll.u..v..i.a..l .d..e..p..o..s..i.t.s.. .(.m...i.d..d..le..(..?..). .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..)................. 12 Qea,. .Q...e..a..o.. .-. .E..o..l.i.a..n.. .a..n..d.. .a..ll.u..v..i.a..l .d..e..p..o..s..i.t.s.. .(.e..a..r..ly..(..?..). .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..).................................................... 12 Lacus..t.r.i.n..e.. .d..e..p..o..s..it.s..................................................................................................................................................... 13 Ql - L..a..c..u..s..t.r..in..e.. .d..e..p..o..s..i.t.s.. .(.m...i.d..d..le..(..?..). .P..l.e..is..t.o..c..e..n..e.. .t.o.. .l.a..t.e.. .H..o..l.o..c..e..n..e..).................................................................... 13 Precip..it.a..t.e..d.. .d..e..p..o..s..i.t.s................................................................................................................................................... 13 Qst -.. .S..p..r.i.n..g.. .t.u..f.a.. .d..e..p..o..s..i.t.s.. .(.m...i.d..d..le.. .P..l.e..i.s..t.o..c..e..n..e..(.?..). .t.o.. .H...o..lo..c..e..n..e..(..?..).)................................................................... 13 Eolian. .d..e..p..o..s..i.t.s............................................................................................................................................................ 13 Qes .-.. .E..o..li.a..n.. .s..a..n..d.. .(.m...i.d..d..le.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)......................................................................................... 13 Mass .m...o..v..e..m...e..n..t. .d..e..p..o..s..it.s............................................................................................................................................ 14 Qms.,. .Q...m..s..h.. .-.. .L..a..n..d..s..li.d..e.. .a..n..d.. .s..l.u..m..p.. .d..e..p..o..s..i.t.s.. .(.e..a..r..ly.. .P..l.e..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..).................................................. 14 Qms.b.. .-. .S...lu..m...p.. .b..l.o..c..k.s.. .(..e..a..r.l.y.. .P..le..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..)...................................................................................... 14 Qmt .-. .T..a..l.u..s.. .d..e..p..o..s..i.t.s.. .(.e..a..r.l.y.. .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..)....................................................................................... 14 Qms.t. .-. .L..a..n..d..s..l.i.d..e..,. .s..lu..m...p..,. .a..n..d.. .t.a..l.u..s.. .d..e..p..o..s..it.s..,. .u..n..d..i.f.f..e..r.e..n..t.i.a..t.e..d.. .(.e..a..r.l.y.. .P..l.e..is..t.o..c..e..n..e.. .t.o.. .H...o..lo..c..e..n..e..)....................... 15 Qmte.. .-. .T..a..l.u..s.. .d..e..p..o..s..i.t.s.. .w...i.t.h.. .e..o..li.a..n.. .s..a..n..d.. .m...a..n..t.le.. .(..e..a..r.l.y.. .P..le..i.s..t.o..c..e..n..e.. .t.o.. .H..o..l.o..c..e..n..e..).............................................. 15 TKb - .B...r.e..c..c..i.a.. .(.L..a..t.e.. .C..r..e..t.a..c..e..o..u..s.. .t.o.. .e..a..r.l.y.. .T..e..r.t.i.a..r.y..)..................................................................................................... 15 Kw l - .W....a..h..w...e..a..p.