Geologic Map of the Black Peak and Bobs Well 7.5 Quadrangles, La Paz County, Arizona, v.2

Pearthree, P.A.; Spencer, J.E.; Youberg, A.; House, P.K.

dc.contributor.author	Pearthree, P.A.
dc.contributor.author	Spencer, J.E.
dc.contributor.author	Youberg, A.
dc.contributor.author	House, P.K.
dc.date.accessioned	2018-09-29T00:32:58Z
dc.date.available	2018-09-29T00:32:58Z
dc.date.issued	2021-09-01
dc.identifier.citation	Pearthree, P.A., Spencer, J.E., Youberg, A. and House, P.K., 2021, Geologic Map of the Black Peak and Bobs Well 7.5 Quadrangles, La Paz County, Arizona. Arizona Geological Survey Digital Geologic Maps DGM-108 v.2, scale 1:24,000.
dc.identifier.uri	http://hdl.handle.net/10150/629496
dc.description	Most of the map area is covered by sand dunes and related features of Cactus Plain. The dune field of Cactus Plain is on a low plateau formed primarily on older eroded sediments, with minor bedrock hills protruding from the plain locally. The oldest late Cenozoic deposits in Cactus Plain are undeformed fan deposits composed primarily of crystalline metamorphic clasts, obviously derived from the east and northeast. These deposits are overlain by, and locally may interfinger with, fine-g rained clay, silt, sand and minor limestone deposits that we consider to be part of the Bouse Formation. Bouse carbonate deposits are also extensively exposed on the flanks of Black Peak and related hills near the northern margin of the map area. On the western, north eastern, and southern margins of Cactus Plain, there are extensive well-rounded, lithologically diverse gravel and sand deposits that we tentatively correlate with the early Pliocene Bullhead alluvium. T h is major river aggradation sequence is found all along the Colorado River below the mouth of the Grand Canyon (House et al., 2008; Howard et al., in prep.).
dc.language.iso	en
dc.relation.ispartofseries	DGM-108
dc.relation.url	https://library.azgs.arizona.edu/item/ADGM-1632853117283-407
dc.rights	Arizona Geological Survey. All rights reserved.
dc.subject	Arizona Geological Survey Digital Geologic Maps
dc.subject	La Paz County
dc.subject	Colorado River
dc.subject	Black Peak
dc.subject	Paleoproterozoic
dc.subject	Mesozoic
dc.subject	Paleozoic
dc.subject	Miocene
dc.subject	Tertiary
dc.subject	Quaternary
dc.subject	Osborne Wash
dc.subject	Bouse Wash
dc.subject	Cactus Plain
dc.subject	granites
dc.subject	carbonates
dc.subject	Bolsa Quartzite
dc.subject	volcanics
dc.subject	Kaibab Limestone
dc.subject	sand sheet
dc.subject	alluvial terrace deposits
dc.subject	Bullhead alluvium
dc.subject	Sand dunes
dc.subject	dune field
dc.title	Geologic Map of the Black Peak and Bobs Well 7.5 Quadrangles, La Paz County, Arizona, v.2
csdgm.bounding.west	-114.25
csdgm.bounding.east	-114
csdgm.bounding.north	34.125
csdgm.bounding.south	34
dc.description.collectioninformation	Documents in the AZGS Document Repository collection are made available by the Arizona Geological Survey (AZGS) and the University Libraries at the University of Arizona. For more information about items in this collection, please contact azgs-info@email.arizona.edu.
refterms.dateFOA	2018-09-29T00:32:58Z