This is the Shinarump Conglomerate, an Upper Triassic, fluvial, coarse-grained siliciclastic unit. The outcrop is part of a rimrock section near the top of a canyon wall in Arizona. The Shinarump consists of quartzose sandstones, pebbly sandstones, and lithic conglomerates.
Stratigraphy: Shinarump Conglomerate Member, lower Chinle Formation, Norian Stage, Upper Triassic
Locality: outcrop next to Sliding House overlook, southern rim of Canyon de Chelly, Canyon de Chelly National Monument, northeastern Arizona, USA
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