Geology and Mineral Deposits of the Carlile Quadrangle Crook County, Wyoming
By M. H. BERGENDAHL, R. E. DAVIS, and G. A. IZETT
CONTRIBUTIONS TO ECONOMIC GEOLOGY
GEOLOGICAL SURVEY BULLETIN 1082-J
Prepared on behalf of the Atomic Energy Commission and published with permis sion of the Commission
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1961 UNITED STATES DEPARTMENT OF THE INTERIOR
FRED A. SEATON, Secretary
GEOLOGICAL SURVEY
Thomas B. Nolan, Director
For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, D.C. CONTENTS.
Abstract. _l"___J_"____"___"__-_---_--r.__- ---"---"--'.-'.-______'____.__.-_ 613 Introduction. _ _V_'_ _"_'______'_"__"_ _ _"_ _ _*_'_ ____'__-_-_-______-__- 614 Location_l____-_-'_-'-_ ----'-'------_------_-- 614 Purpose and scope of the investigation! "__ __-_--__-______-__-- 615 Acknowledgements- '______'_'_ -_-'___ _'______"______!. ____.__. 615 Previous work______"_---_-_"-_-____-_-'___'----____--_-----'__--_- 616 Geography______-_------_-_-_-_------_------617 General' geology- _ .__'______-__-______--:_----__- __-._ 618 Stratigraphy_____--_----_--_---_-_-_--'------_------618. 'Upper Jurassic" series^ _V_"______-"-______-______--_- 619' Sundance formation- _ _"_ _ _ _'______._____-_J______- 619' Morrison fdrmation____J___----______. ___.__-__. T ____ 621 " Lower Cretaceous series. ______625 Inyan "Kara group_--_-______:_----'______._'__. ______625 Lakota iormatioriJ______- 625 Sandstone unit______626" MudstoneuhitJ- ______"_.' _____'_.______627 Stratigraphic relations and age______628 Fall River formation.. ___..______629 Siltstone unit______.______629 Mudstone unit- ______630 Sandstone unit. ______631 Upper unit_-_____-__-__-_____.__-______- 631 Stratigraphic relations and age______632 Skull Creek shale ______647 Newcastle sandstone. ______^-______649 Mowry shale ______651 Upper Cretaceous series-______-___-_-____-___--______- 652 Belle Fourche shale. ______.__. _ ..__.__.____ 652 Greenhorn formation ______652 , Carlile shale, lower unnamed member. ______653 Pleistocene, and Recent series____ -____-__-_.______-_-_ 654 Stream terrace deposits. ______654 Alluvium____-___-______--______654 Landslide debris.. _ _--__-_-______-______'___ 655 Structure. -___-______--_____-_-_-_-_____---_.______._>_-_ 655 Folds______--_--__-___-_-___-._____. ______655 Black Hills monocline.------.--.---....--..--^.-- 655 Oil Butte anticline _ ___-___-__.__-_._._-______656 Pine Ridge anticline. ______657 Dakota Divide anticline__-______657 Synclines. ___-___-_____. -___-___-_-______l_-_____-_ 658 Faults and joints. ______658 Landslides. ______659 Structural history. ______659 m IV CONTENTS