USGS: Geological Survey Bulletin 1063-G (Contents)

Geological Survey Bulletin 1063—G

Geology of the Jewel Cave SW Quadrangle, Custer County, South Dakota

CONTENTS

Cover

Abstract

Introduction

Acknowledgments

Stratigraphy

Permian rocks
   Minnelusa Formation
      Petrography of the upper part of the Minnelusa Formation
         Sandstone
         Dolomite
         Anhydrite
         Replacement of dolomite by anhydrite
         Fluorite
      Leaching of anhydrite and alteration of associated rocks
         Oxidation
         Replacement of anhydrite and dolomite cement by calcite and iron oxide
         Alteration of dolomite to dolomitic limestone
   Opeche Formation
   Minnekahta Limestone
Permian and Triassic rocks
   Spearfish Formation
Jurassic rocks
   Sundance Formation
      Canyon Springs Sandstone Member
      Stockade Beaver Shale Member
      Hulett Sandstone Member
      Lak Member
      Redwater Shale Member
      Regional correlation
      Environment of deposition
   Morrison Formation
Cretaceous rocks
   Inyan Kara Group
      Lakota Formation
         Chilson Member
         Fuson Member
         Composition of sandstone of the Lakota Formation
         Environment of deposition of the Lakota Formation
      Fall River Formation
         Lower unit
         Middle unit
         Upper unit
         Composition of sandstone of the Fall River Formation
         Environment of deposition of the Fall River Formation
   Skull Creek Shale and Mowry Shale
Quaternary deposits

Structure

Dewey fault
Northwest-trending anticines
Subsidence structural features
   Collapse breccias in the Minnelusa Formation
   Breccias in the Spearfish Formation
   Undulations and normal faults in the Minnekahta Limestone
   Breccia pipes
   Origin of subsidence structures
   Time of leaching
Minor deformational structural features in the Minnekahta Limestone and Spearfish Formation

Uranium deposits

References cited

Index (omitted from the online edition)

UNITED STATES DEPARTMENT OF THE INTERIOR
STEWART L. UDALL, Secretary

GEOLOGICAL SURVEY
Thomas B. Nolan, Director

ILLUSTRATIONS

PLATE

20. Geologic map and section of the Jewel Cave SW quadrangle, South Dakota (omitted from the online edition)
21. Lithology of the Minnelusa Formation (omitted from the online edition)
22. Major lithologic units of the Inyan Kara Group (omitted from the online edition)

FIGURE

43. Index map of the Black Hills
44. Lithology of the Spearfish Formation
45. Geologic map showing the truncation of basal siltstones of the Lakota Formation
46. Diagrammatic cross section showing interfingering of S₁ channel sandstone and carbonaceous siltstone
47. Direction of dip of cross strata in the S₁ sandstone
48. Direction of dip of cross strata in the S₅ sandstone
49. Sections of the Dewey fault
50. Lower part of the collapse breccia in the Minnelusa Formation
51. Small breccia pipe that penetrates the Minnekahta Limestone
52. Cross section E—E' of plate 20
53. Thrust fault which passes upward into small fold
54. Bearing of the axes of minor folds in the Minnekahta Limestone
55. Deformed gypsum beds
56. Contorted gypsum beds

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Last Updated: 28-Nov-2007