Prepared and Published with the Support of COUNTY ATLAS SERIES THE MOWER COUNTY BOARD OF COMMISSIONERS AND ATLAS C-11, PART A MINNESOTA GEOLOGICAL SURVEY Plate 2—Bedrock Geology D.L. Southwick, Director THE MINNESOTA DEPARTMENT OF NATURAL RESOURCES, DIVISION OF WATERS
° R 18 W 93 00' B' R 17 W R 16 W 92°45'
Omaq 56 1 6 6 1 6 1 Ogal R 15 W R 14 W 92°30'
Odub er v Odub 16 i Dspl 00 R 1100 reek 11 UDOLPHO 1150 C 7 oot Omaq k BEDROCK GEOLOGY R ree 8 Ogal 1 Omaq PLEASANT C AA y AA' Waltham re Odub Dspl VALLEY a C Dclp By 1 Sargeant 63 T 104 N A' n so 90 in Omaq John H. Mossler ch b n o a R Br Dspl 1250 SARGEANT T 104 N 1100 1998 C Dspl e Omaq
d
a WALTHAM 12 218 r 20 RACINE Dclp 00 1 STRATIGRAPHIC COLUMN 1050 12 50 North Dclp U 31 R 36 31 31 iv 56 36 31 36 31 36 D 36 e Racine r Group, Natural Gamma Log 1250 Era Formation, Lithology Increasing count
BB Unit N BB' o Series Member r 0 100 th R Omaq Unit Symbol o 6 API-G units 6 b 1 6 1 Hydrostratigraphic LANSING 1 erts 1 6 Thickness (in feet) Lansing Creek 6 1 43°45' Dclp 7 Bear 43°45' 2 Ostrander Fork Member Kwos Dspl Creek Upper Omaq 250 Iron Hill Fe Fe 20Ð35
DEXTER Windrow 2 1 (<100 m.y.) Kwih
Brownsdale Formation
Cretaceous Member Omaq MESOZOIC
D 1050 Dclp Lithograph Dclp k U ee City Dcuu Cr Dspl Formation k r Up to 50
1000 ree GRAND ea Odub Wolf C B Dclc MEADOW th Fork Ramsey ou 1100 S Coralville Mill Pond Creek T 103 N T 103 N Deer Formation Dspl D RED ROCK Dexter Grand 57Ð61 Ogal Dcum 16 16 Dcum U U Meadow D k 1050 1100 16 e 20 e Hinkle & Mur r Dcum
phy 1150 C Dclc Eagle CC C CC' re Center Mbrs 25Ð35 e 1050 k U D
U Cedar Valley Group ins FRANKFORD Chickasaw 1100 D b Dclc Dclp b Member o Dclp Maple View D Dspl 15Ð43
1150 8 Dspl Bassett
36 Little Cedar Formation 31 31 1200 14 Member 36 31 36 31 36 31 40Ð70 1100 1100 Dclc Dclp Pinicon 16 90 1250 Dclc Dcum Elkton Ridge 6 1 6 1 6 1 6 1 6 1 Formation 20Ð47 90 Middle Devonian (387Ð374 m.y.) ek re r C ee er 3 Dclc Dclp D Riv Dcum Spillville Dspl 1050 Formation
Dclc 21Ð84 3 Dcum Root Wapsipinicon Group DD 1000 DD' Austin 56 Dclc Dcum Branch 1050
O 1000 7 r c h 105 South a Maquoketa r 3 Omaq
T 102 N d CLAYTON 1100 T 102 N C Formation
AUSTIN 36Ð85 r
C Dclp e Dcum
e MARSHALL k
BENNINGTON Dubuque Dcuu 3 Odub Formation 23Ð40
Dclp 1150 D U Dcuu 1050 Dclc 4 Dcuu