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Table of Contents - Special Paper 342:

Structural Geology of the Colorado Plateau Region of Southern Utah, with Special Emphasis on Deformation Bands
Abstract 1
Introduction 3
Background and objectives 3
Methodological approach 8
Organization of text 10

Part I: Major regional structures
Geography 11
  Physiographic subprovinces 11
  River systems 12
  Road access 12
Regional stratigraphy 13
  The map pattern of formations 13
  The mechanical stratigraphy 15
  Space-satellite views of regional relationships 16
Basin and Range structures 16
  Hurricane fault 20
  Sevier fault 21
  Paunsaugunt fault 24
Middle Tertiary (Miocene) structures 26
  Paunsaugunt thrust system 26
  Henry Mountains laccoliths 33
Laramide structures 36
  Kaibab uplift 36
  Kaiparowits Plateau 42
  Circle Cliffs uplift 42
  Miners Mountain uplift 44
  San Rafael Swell 47

Part II: Deformation-band shear zones
Introduction to deformation bands 51
  Background 51
  Basic properties of deformation bands in outcrop 53
  Microscopic fabrics of deformation bands 55
  Varieties of deformation bands in the study region 57
Analysis of deformation bands, Zion subregion 61
  General description of the subregion 61
  Outcrop properties of deformation bands 61
  Microscopic properties of the deformation bands 65
  Stereographic geometries of the deformation bands 65
  Origin of the noncataclastic deformation bands 66
Analysis of deformation bands, Sevier subregion 66
  General description of the subregion 66
  Outcrop properties of the noncataclastic deformation bands 66
  Stereographic geometry of the noncataclastic deformation bands 69
  Origin of the noncataclastic deformation bands 70
  Outcrop properties of the cataclastic deformation bands 70
  Stereographic geometry of the cataclastic deformation bands 72
  Origin of the cataclastic deformation bands 72
Analysis of deformation bands, Paunsaugunt subregion 73
  General description of the subregion 73
  Outcrop properties of cataclastic deformation bands associated with Rubys Inn thrust faulting, Hillsdale Canyon subarea 73
  Outcrop properties of cataclastic deformation bands associated with Rubys Inn thrust faulting, Tropic Ditch subarea 76
  Stereographic geometry of the early Miocene deformation bands 77
  Cataclastic deformation bands associated with the Paunsaugunt faulting 77
  Origin of the deformation bands 77
Analysis of deformation bands, Kaibab subregion 78
  General description of the subregion 78
  Properties of noncataclastic deformation bands in Navajo and Page sandstones 78
  Properties of the superposition of cataclastic and noncataclastic deformation bands 83
  Properties of the cataclastic deformation-band shear zones 84
  Mapping of the cataclastic deformation-band shear zones 87
  Recognition of Riedel shearing 91
  Further descriptions of properties of deformation bands in Navajo Sandstone in the northern part of the Kaibab subregion 92
  Properties of deformation bands in Straight Cliffs Sandstone in the northern part of the Kaibab subregion 94
  Analysis of deformation bands in Navajo Sandstone in the southernmost part of the Kaibab subregion 96
  Origin of the deformation-band shear zones in the subregion 96
Analysis of deformation bands, the Kaiparowits subregion 97
  General nature of the subregion 97
  Properties of deformation bands in Straight Cliffs Formation, northern Kaiparowits subregion 101
  Properties of deformation bands in Navajo Sandstone, northern Kaiparowits subregion 101
  Properties of deformation bands in Navajo Sandstone, southern Kaiparowits subregion 102
  Properties of deformation bands in Entrada Formation, southern Kaiparowits subregion 103
  Origin of the deformation-band shear zones in the subregion 105
Analysis of deformation bands, Waterpocket subregion 105
  General nature of the subregion 105
  Properties of deformation bands exposed along the shores of Lake Powell 107
  Properties of deformation bands along the southern half of the Waterpocket Fold 112
  The Sheets Gulch subarea 114
  Properties of deformation bands in the northern part of the Waterpocket subregion 119
  Origin of deformation bands in the Waterpocket subregion 122
Analysis of deformation bands, San Rafael Swell subregion 124
  General nature of the subregion 124
  Properties of deformation bands, subarea by subarea 127
  Origin of the deformation bands 130
Analysis of deformation bands, Henry Mountains subregion 130
  General nature of the subregion 130
  Properties of the deformation bands in the subregion 130
  Origin of the deformation bands and deformation-band shear zones 135

Conclusions: Structural and tectonic development of the region		 137
Appendix 148
Acknowledgments 154
References Cited 155