Named as the upper division of the Almy conglomerate of the Wasatch group for Saw Mill Canyon, 4 1/2 mi up Echo Canyon from the Weber, Summit Co, UT on the Uinta uplift. No type locality designated. Is separated in Echo Canyon from the underlying Pulpit conglomerate, lower division of the Almy conglomerate, by a conspicuous 5- to 30-degree angular unconformity. To north relationship with underlying conglomerate becomes concordant and section is not divisible. Where not divisible, name Almy conglomerate applied. Underlies Fowkes formation. Divisible into a lower 400 ft of massive, red, cliff-making conglomerate, middle 500 ft of light-tan and gray conglomerate, grit, sandstone, shale, and an upper 300 ft of tan conglomerate. Rocks above the unconformity are nine tenths purple and pink laminated quartzite and quartzitic conglomerate, either from the Cambrian or Proterozoic, Proterozoic source preferred. The remaining conglomerate derived from the Paleozoic and Mesozoic. Geologic map; cross sections. Of middle Paleocene?, Dragonian and Torrejonian age.

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

Nomenclature chart shows Saw Mill Conglomerate of Eardley (1944) as equivalent to the Evanston Formation, as used in lower Echo Canyon, Summit Co, UT on the Uinta uplift.

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