Pg. 31-33. Harriman shale member of Lykins formation. Name proposed to represent lowermost unit of Lykins formation. In Glennon Canyon (Golden-Morrison area, north-central Colorado), member consists primarily of red arenaceous thin-bedded shales and mudstones containing several thin layers of white massive fine to medium crystalline limestone in lower third. Limestone layers rarely exceed 6 inches in thickness and contain black brittle bituminous material along fractures and in minute vugs. Bituminous material also occurs sporadically throughout lower half of shale in thin discontinuous streaks along and transverse to bedding planes. Shales immediately adjacent to bituminous material are of bluish-green tints. Thickness 58 to 92 feet in area. Underlies Falcon limestone member (new); rests sharply on conglomeratic phase of Lyons formation. Age is Permian.
Type section: in west tributary of Glennon Canyon, Golden-Morrison area, Jefferson Co., north-central CO, where typically developed and well exposed. Named from Harriman irrigation canal, [in sec. 1, T. 5 S., R. 70 W., and sec. 6, T. 5 S., R. 69 W., Morrison 7.5-min quadrangle, Jefferson Co.], which receives water from Bear Creek at town of Morrison.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1685).

Is Permian? lower member of Lykins formation mapped in east-central Jefferson Co, CO (Denver basin). Mapped undifferentiated with Bergen shale member of Lykins. Crops out in valley between hogbacks of Lyons sandstone and Lytle and South Platte formations in southwestern portion of map area. As described by LeRoy (1946, CO Sch. Mines Quart., v.41, no. 2, p. 31) consists of 70 ft of moderate-reddish-brown thin bedded silty shale. Map unit conformably overlies Lyons sandstone (Permian); underlies Glennon limestone member (Permian?) of Lykins.

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

Is Permian member of Lykins Formation (Permian and Triassic?) mapped in central Jefferson Co, CO (Denver basin). Is lowermost of five members of Lykins. Outcrops in northeast part of quad as narrow band along Hogback. Conformably overlies informally named "limestone bed of the Ken Caryl Ranch" which is a very fine grained yellowish-gray limestone, similar to Falcon, about 1 ft thick occurring at base of Lykins and forms crest of Lyons Sandstone ridge north of Dutch Creek and near Ken Caryl Ranch house. Limestone bed of Ken Caryl Ranch, in turn, overlies Lyons Sandstone (Permian). Harriman conformably underlies Falcon Limestone Member (Permian) of Lykins. Map unit described as moderate-reddish-brown thin-bedded silty shale. Thickness about 70 ft.

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