First published use of name. Intent to name and designation of a type not given. Is a granite characterized by its fine and even grain size when compared to Pikes Peak or Summit types. Has finely coherent sacchroidal aggregates of microcline, vitreous quartz, glistening biotite with some zircon, hematite, magnetite, and apatite. The phenocrysts are usually microcline which are pink, rectangular, and can reach 1/2 inch in length. Is poor in perthitic feldspar, micropegmatite, and fluorite. Irregular grains of quartz make up one-seventh to one-quarter of the rock mass. Zircon, apatite, and magnetite are rare. Is well-developed between Lake George, Park Co, CO, and town of Cripple Creek, Teller Co, CO, both in the Southern Rocky Mountain region. Cuts Pikes Peak and Summit types. Is intermediate between Pikes Peak and Summit types in manner of weathering and resultant physiographic forms. Hills composed of Cripple Creek type are not so smooth, bold or massively jointed as those composed of Pikes Peak type, nor are they as compact and angular as those of Summit type. Geologic map. Of Algonkian age.

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

Also called Cripple Creek Quartz Monzonite. Occurs in a batholithic body in the southern Front Range. Listed with granitic rocks and gabbro of circa 1,400 m.y. (Precambrian Y) age group.

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

Assigned with unnamed units and ten named units to Middle Proterozoic Berthoud Plutonic Suite, a new name in this report. Is in a batholith about 650 sq km (250 sq mi) on west side of Pikes Peak in southern Front Range. Resembles Silver Plume Granite, but is more consistently pink or red. Contains primary muscovite; has equigranular and porphyritic facies. Inclusions of gneissic granodiorite of Routt Suite are common in it. Thought to be equivalent of Silver Plume, which has a Rb-Sr age of about 1,400 m.y. Assigned to Middle Proterozoic.

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