Named for Beckers Butte, AZ as basal member of Martin Formation. Type section near mouth of Flying V Canyon in SW1/4 SW1/4 sec 29, T5N, R18E (projected), Gila Co., AZ in Basin-and-Range province. Extends northwestward to Yavapai Co., AZ. Consists predominantly of sandstone. 15 ft thick in type section. Rests unconformably on Precambrian diabase. Overlain by Jerome Member. Is of Early or Middle Devonian age. Deposited in fluvial environment.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Age tentatively given as Eifelian (early Middle Devonian). Called Sandstone Member.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Elevated to formation of Martin Group. Is probably Early Devonian and certainly no younger than Middle Devonian.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Of Martin Group, is dated as either Givetian (Middle Devonian) or early Frasnian (lowermost Upper Devonian) on basis of flora contained in type section.
Source: GNU records (USGS DDS-6; Denver GNULEX).
Of Martin Formation, accepted as upper Middle or lower Upper Devonian.
Source: GNU records (USGS DDS-6; Denver GNULEX).
For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.
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