Named. Type area in Temporal Gulch between mouth of Mansfield Canyon and ranch in gulch in Santa Rita Mountains, Santa Cruz Co, AZ, Mount Wrightson quad. Crops out low on southeast flank, Santa Rita Mountains. Is 1,000-2,000 ft thick. Basal member contains rhyolitic to andesitic tuffs and welded flows, arkosic fanglomerate and polymictic conglomerate. A middle member consists of conglomerate, rhyolitic tuff and porphyritic latite flows which grade laterally into andesite flows and volcanic breccia. Top member consists mostly of boulder and cobble conglomerate, rhyodacite breccia, and lenses of volcanic rock. Unconformably overlies Squaw Gulch Granite and is overlain by Bisbee Formation. Is assigned to early Early Cretaceous.
[NOTE: The Department of the Interior's Secretarial Order 3404, issued on November 19, 2021, formally identifies the term “squaw” as derogatory. That Order will create a federal Derogatory Geographic Names Task Force, to find replacement names for geographic features in use by federal agencies. We’re awaiting guidance from the Task Force, and will then take the appropriate actions.]

Source: GNU records (USGS DDS-6; Denver GNULEX).

Is basal Cretaceous formation in Santa Rita Mountains (Santa Cruz and Pima Cos, AZ) in Basin-and-Range province. Is divided into three informal members following Drewes (1970). Overlies Jurassic granite; underlies Bathtub Formation (Neocomian) with general disconformity but locally with slight angular unconformity. Thickness is 1,000-2,000 ft. Age is shown to be Neocomian (Early Cretaceous) on correlation chart (fig. 5).

Source: GNU records (USGS DDS-6; Denver GNULEX).

Is part of a second cycle of andesite and rhyolitic volcanism and sedimentation in this area. Dated at 151 +/-5 Ma by whole-rock Rb-Sr isotopic method. Samples collected in southern AZ in the Basin-and-Range province.

Source: GNU records (USGS DDS-6; Denver GNULEX).