Geologic Interpretations of a Siliceous Breccia in the Colossal Cave Area, Pima County, Arizona

Acker, Clement John

dc.contributor.advisor	Lance, John F.	en_US
dc.contributor.author	Acker, Clement John
dc.date.accessioned	2012-06-28T03:13:57Z
dc.date.available	2012-06-28T03:13:57Z
dc.date.issued	1958
dc.identifier.uri	http://hdl.handle.net/10150/231214
dc.description.abstract	In the Colossal Cave area, Pima County, Arizona, massive blocks of Paleozoic sedimentary rocks have been thrust from a southerly direction over an irregular surface of Rincon Valley granite of Laramide age. The Paleozoic rocks involved in the thrusting are the Bolsa quartzite, Abrigo formation, Martin limestone, Escabrosa limestone, Horquilla limestone, and Andrada formation. The Pantano formation (Miocene ?) is also present under the thrust sheet. The thrusting is of an imbricate nature with slip-page mainly teaking place along incompetent rock units. Large folds occur in the Escabrosa limestone and Horquilla lime-stone. A siliceous breccia is associated with thrust planes in the area. The competent units of the Paleozoic sediments were fractured and brecciated along the thrust planes. Solutions dissolved part of the silica and hematite from the Bolsa quartzite and deposited it in the fractured and brecciated zones.
dc.language.iso	en_US	en_US
dc.publisher	The University of Arizona.	en_US
dc.rights	Copyright © is held by the author. Digital access to this material is made possible by the Antevs Library, Department of Geosciences, and the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author or the department.	en_US
dc.subject	Arizona	en_US
dc.subject	breccia	en_US
dc.subject	clastic rocks	en_US
dc.subject	Colossal Cave	en_US
dc.subject	Pima County Arizona	en_US
dc.subject	sedimentary petrology	en_US
dc.subject	sedimentary rocks	en_US
dc.subject	siliceous composition	en_US
dc.subject	United States	en_US
dc.subject	Geology -- Arizona -- Pima County	en_US
dc.subject	Breccia	en_US
dc.title	Geologic Interpretations of a Siliceous Breccia in the Colossal Cave Area, Pima County, Arizona	en_US
dc.type	text	en_US
dc.type	Thesis-Reproduction (electronic)	en_US
dc.identifier.oclc	28012497
thesis.degree.grantor	University of Arizona	en_US
thesis.degree.level	masters	en_US
thesis.degree.discipline	Graduate College	en_US
thesis.degree.discipline	Geology	en_US
thesis.degree.name	M.S.	en_US
dc.description.note	Antevs Library	en_US
dc.description.collectioninformation	This item is part of the Geosciences Theses collection. It was digitized from a physical copy provided by the Antevs Library, Department of Geosciences, University of Arizona. For more information about items in this collection, please email the Antevs Library, antevs@geo.arizona.edu.	en_US
dc.contributor.creator	Acker, Clement John	en_US
dc.identifier.georef	1988-024249
refterms.dateFOA	2018-06-22T22:24:07Z
html.description.abstract	In the Colossal Cave area, Pima County, Arizona, massive blocks of Paleozoic sedimentary rocks have been thrust from a southerly direction over an irregular surface of Rincon Valley granite of Laramide age. The Paleozoic rocks involved in the thrusting are the Bolsa quartzite, Abrigo formation, Martin limestone, Escabrosa limestone, Horquilla limestone, and Andrada formation. The Pantano formation (Miocene ?) is also present under the thrust sheet. The thrusting is of an imbricate nature with slip-page mainly teaking place along incompetent rock units. Large folds occur in the Escabrosa limestone and Horquilla lime-stone. A siliceous breccia is associated with thrust planes in the area. The competent units of the Paleozoic sediments were fractured and brecciated along the thrust planes. Solutions dissolved part of the silica and hematite from the Bolsa quartzite and deposited it in the fractured and brecciated zones.