Named as one of eight formations of Dove Creek Group (new) for exposures several mi long north of Mount Harrison, Albion Range. Named for Dayley Creek. Type section extends along the ridge from NE1/4 sec 32 to SW1/4 sec 3, T12S, R24E, Cassia Co, ID in the Great Basin province. Consists of massive, gray to tan, generally pure, locally micaceous, sugary weathering quartzite that forms a high ridge. Has a few thin lenses of staurolite-garnet-bearing, biotite-muscovite-quartz schist, and blue-gray limestone. Quartzite conglomerates of grit to pebble-size clasts in a quartz sand matrix are scattered through the formation. About 7,000 ft thick. Cross-bedding, though not uncommon, is upright. Overlies the newly named Cambrian and Ordovician Land Creek Formation of Dove Creek Group; contact placed at base of quartzite with schist of the Land Creek. Underlies the newly named Ordovician, Silurian, Devonian Cassia Dolomite of the Dove Creek Group; upper contact placed at base of dolomite, a contact that is gradational over a few yards. Geologic map; mapped in northwest part of Albion Range. Of Ordovician age.

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