Named as upper of two members of Sheep Crossing Formation for Sheep Crossing Campground in White Mountains, southern Apache Co, AZ, Black Mesa basin. Represents deposit originally named Sheep Crossing Formation by Merrill and Pewe (1971). Unit described at type section [location not stated; is presumably same as for Sheep Crossing]. Type for Sheep Crossing in this report is stated to be a railroad cut 700 m northeast [designated as 200 m east in Merrill, Pewe, 1971] of Sheep Crossing, near campground, immediately southeast of West Fork of Little Colorado River. Occurs as isolated patches around perimeter of Mount Baldy Formation (new). Consists of poorly sorted sand and gravel; locally shows crude stratification and a graded size distribution. Contains boulders up to 6 m in diameter consisting of all volcanic types found on Mount Baldy. Commonly has deep soil development. Boulders are in an advanced state of weathering. Thickness at type is 304 cm (3.04 m). Overlies Marshall Butte Member (new) of Sheep Crossing; underlies basalt dated at 8.9 +/-0.9 m.y. Geologic map. Miocene age.

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