Partial database for breccia pipes and collapse features on the Colorado Plateau, northwestern Arizona v1.0

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Author
Spencer, J.E.
Wenrich, K.J.
Cole, T.
Issue Date
2015-06-22
Keywords
Arizona Geological Survey Digital Information
Pennslyvanian
Mississippian
Permian
Triassic
Paleozoic
Coconino County
Mohave County
little colorado river
Colorado River

Metadata
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Citation
Spencer J.E., Wenrich, K.J. and Cole, T., 2015, Partial database for breccia pipes and collapse features on the Colorado Plateau, northwestern Arizona, v 1.0. Arizona Geological Survey Digital Information, DI-42, 5 p., 1 map plate, shapefiles, and Excel Workbook.
Description
A breccia pipe is a vertical, pipe-like mass of broken rock (breccia), typically a few tens of meters across and hundreds of meters in vertical extent. Breccia pipes formed within Paleozoic and Triassic strata over a broad area around the Grand Canyon, and some contain high-grade uranium ore (Wenrich and Titley, 2008). They were created when groundwater (possibly basin brines), flowing through Redwall Limestone dissolution breccias and along fracture zones, dissolved more limestone, causing collapse of overlying rocks and possibly creating sink holes. Some pipes extend many hundreds of meters upward into the Chinle Group (formerly Chinle Formation; Heckert and Lucas, 2003), indicating that some pipes are at least as young as this Upper Triassic rock unit (Brown and Billingsley, 2010). Some pipes are blind and never broke through to the surface. Breccia pipes are abundant in the Grand Canyon region, with at least 1300 pipes or suspected pipes identified (Sutphin and Wenrich, 1989; Brown and Billingsley, 2010). These breccia pipes have been of interest both for their economic value and because they are adjacent to Grand Canyon National Park and the Colorado River (Spencer and Wenrich, 2013).
URI
http://hdl.handle.net/10150/630067
Additional Links
https://library.azgs.arizona.edu/
Language
en
Rights
Arizona Geological Survey. All rights reserved.
Collection Information
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.
North Bounding Coordinate
36.9214
South Bounding Coordinate
35.5837
West Bounding Coordinate
-114.697
East Bounding Coordinate
-110.907
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