Grand Canyon, Arizona | An eroded remnant of a cemented breccia pipe in plain view along the South Kaibab Trail, South Rim, Grand Canyon. Breccia pipes are commonly associated with sinkholes formed on the Colorado Plateau and sought after for their concentration of minerals. Breccia Pipes of northern Arizona Breccia Pipe Province formed about 200 million years ago when overlying strata collapsed into the cavernous, Mississippian Redwall Limestone. | Photo by Brian F. Gootee
Online Resources:
Alter, M., Grant, R. Williams, P. and Sherratt, D., 2016, Structural Geology and Hydrogeology of the Grandview Breccia Pipe, Grand Canyon National Park, Arizona. Arizona Geological Survey Contributed Report CR-16-b, 23 p, 1 appendix (16 p.). http://repository.azgs.az.gov/uri_gin/azgs/dlio/1676
Spencer J.E., & others, 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. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1634
Spencer, J.E. and Wenrich, K., 2011, Breccia-pipe Uranium Mining in the Grand Canyon Region and Implications for Uranium Levels in Colorado River Water. Arizona Geological Survey Open File Report, OFR-11-04, 1 appendix, 11 p. http://repository.azgs.az.gov/uri_gin/azgs/dlio/1000
