Name applied to a fanglomerate-mudflow breccia in the western and southeastern part of the border zone of the Three Peaks intrusion, Iron Co., UT in the Great Basin province. This breccia occurs at the disconformable contact between the "Entrada" formation and the basal quartzite conglomerate of the Iron Springs formation (named). Occurs as irregular lenses. Variable in thickness from 0 to 50+ ft within a short distance. Contains predominately angular blocks of Homestake limestone up to 5 ft in diameter, and rarely much smaller fragments of "Entrada". Locally intertongues with basal conglomerate of the Iron Springs. Thought to be of local derivation. Geologic map. Of Late Cretaceous age [age not clearly stated. Source of geographic name and designation of a type locality not stated.]

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

Name applied to a 0-100 ft thick resistant dark gray unsorted breccia containing pebble- and cobble-size clasts as much as 5 ft in diameter in a limy and sandy matrix. Clasts almost entirely of Homestake Limestone Member of Carmel Formation. Overlies banded member of Carmel. Intertongues with lower member of Iron Springs Formation. Mapped at south edge of the Three Peaks pluton at north central edge of quad., Iron Co., UT in the Great Basin province. Of fanglomerate or of mudflow origin. Of Late Cretaceous? age.

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