Variant title	Title on plate 5: Geologic map of parts of the Benson and Pearce quadrangles, Arizona
Variant title	Title on plate 6: Geologic sections in parts of the Benson and Pearce quadrangles, Arizona
Variant title	Title on plate 11: Geologic sketch map of the Courtland-Gleeson area, Arizona
Variant title	Title on plate 10: Map of the physiographic surfaces of the Benson quadrangle, Arizona
Series	Geological Survey (U.S.). Professional paper ; 281 Geological Survey professional paper 281. ^A16492
Contents	Abstract -- Introduction -- Location, culture, and accessibility -- Physical features -- Climate and vegetation -- Fieldwork -- Scope of the report -- Acknowledgments -- Principal geologic features -- Pre-Cambrian rocks -- Pinal schist -- Intrusive rocks -- Hornblende-quartz diorite -- Albite granite west of Ajax Hill, Tombstone -- Minor granitic mass north of South Pass -- Metagabbro and metadiabase associated with Pinal schist -- Saussuritic quartz monzonite near Dragoon Camp -- Pre-Middle Cambrian unconformity -- Cambrian system -- Middle Cambrian series -- Bolsa quartzite -- Middle and Upper Cambrian series -- Abrigo limestone -- Age and correlation of the Abrigo limestone / Palmer, A.R. -- Regional relations of Cambrian rocks -- Pre-Upper Devonian unconformity -- Devonian system -- Upper Devonian series -- Martin limestone -- Post-Martin-pre-Carboniferous disconformity -- Mississippian system -- Early and middle Mississippian -- Escabrosa limestone -- Paleontology of the Escabrosa limestone / Steele Williams, James -- Mississippian-Pennsylvanian disconformity -- Pennsylvanian and Permian systems -- Naco group -- Name and subdivisions -- Horquilla limestone -- Earp formation -- Colina limestone -- Epitaph dolomite -- Age and correlation of the Naco group / Steele Williams, James -- Horquilla fauna -- Earp fauna -- Colina and Epitaph faunas -- Post-Paleozoic-pre-Cretaceous intrusive rocks -- Juniper Flat granite -- Gleeson quartz monzonite -- Copper Belle monzonite porphyry -- Cochise Peak quartz monzonite -- Turquoise granite -- Post-Paleozoic-pre-Creteaceous unconformity -- Cretaceous system -- Components -- Cretaceous volcanic rocks -- Comanche series -- Bisbee group and Bisbee formation -- Glance conglomerate -- Morita formation -- Mural limestone -- Cintura formation -- Bisbee formation -- Cretaceous fossils / Reeside, Jr., J.B. -- Post-Comanche-prevolcanic unconformity -- Tertiary system -- General statement -- Igneous rocks older than local thrust faults -- Tombstone area -- Bronco volcanics -- Courtland-Gleeson area -- Sugarloaf quartz latite -- Basalt associated with Sugarloaf quartz latite -- Northern Dragoon Mountains and Suphur Spring Valley area -- Granite gneiss near Jordan and Fourr Canyons -- Granite in Ash Creek Ridge -- Intrusive rocks younger than thrust faults -- Uncle Sam porphyry -- Andesite porphyry plug and dikes near Bronco Hill -- Schieffelin granodiorite -- Dikes related to Schieffelin granodiorite -- Intrusive rhyolite -- Stronghold granite -- Siliceous dikes related to Stronghold granite -- Lamprophyre (spessartite) dikes -- Volcanic and sedimentary rocks younger than local thrust faults -- Sedimentary rocks older than S O volcanics -- S O volcanics -- Hornblende andesite porphyry plug -- Quartz latite porphyry dikes -- Pearce volcanics -- Gila conglomerate -- Olivine basalt -- Quaternary deposits -- General features -- San Pedro Valley -- Sulphur Spring Valley -- Upland areas -- Structure -- General statement -- Pre-Cambrian deformation -- Post-Paleozoic-pre-Cretaceous deformation -- Post-Comanche-pre-Pliocene deformation -- General statement -- Structural features older than thrust faults -- Thrust faults and associated structural features -- Northern Mule Mountains -- Government Butte -- Earp Hill -- Tombstone Hills -- General statement -- Tombstone syncline -- Prompter fault -- Ajax Hill horst -- Ajax Hill fault -- Horquilla Peak fault -- Southeastern spur of Horquilla Peak -- Hills in T. 20 S., R. 23 E -- Colina Ridge -- Area east of Bronco Hill -- Area west of Ajax Hill horst -- Interpretation of structural features of Tombstone Hills -- First stage-north-south compression -- Second stage-erosion and reduction of the older topography -- Third stage-extrusion of the Bronco volcanics -- Fourth stage-southwest-northeast compression -- Dragoon Mountains -- General structure -- Area north of Cochise Stronghold -- General features -- Mount Glen fault -- Stronghold Divide fault -- Cochise Stronghold area -- Area between Stronghold granite massif and Middle Pass -- General features -- Postulated continuation of Mount Glen thrust -- Higher thrust sheets in foothills east of Middlemarch Canyon -- Structure immediately east of Middlemarch Canyon -- Structure between Middlemarch Canyon and Soren's Camp -- Structure west of Middle Pass -- Structure between Middle Pass and South Pass -- The Dragoon fault -- Structure within the Dragoon thrust block -- Faults along western base of the mountains -- Structural features east of the Dragoon fault -- Area from Middle Pass to vicinity of Dragoon Camp -- Structural features of the Bisbee formation -- Structural interpretation -- Area from South Pass to North Courtland -- The Dragoon fault -- Structural features east of the Dragoon fault near South Pass -- Structural features near North Courtland -- Courtland-Gleeson area -- General statement -- Structures affecting the S O and Pearce volcanics -- Basin and Range faults -- Geologic history -- Bibliography -- Index.
Local note	Joyner- FOR JOYNER LIBRARY HOLDINGS OF THE SERIES, GEOLOGICAL SURVEY PROFESSIONAL PAPER, SEARCH BY CALL NUMBER QE75 .P9.
General note	""Plates 5-12 are in pocket."
General note	Part of illustrative matter folded in pocket.
Bibliography note	Includes bibliographical references (pages 161-163).
Other forms	Also available on the Internet.
Issued in other form	Online version: Gilluly, James, 1896-1980. General geology of central Cochise County, Arizona
LCCN	gs 56000199
Govt. docs number	I 19.16:281

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