Granitic rocks of 1700-m.y. age group (COXg;0)

Granitic rocks of 1700-m.y. age group

Includes Boulder Creek -M.Y. AGE GROUP (AGE 1650-1730 M.Y.)--Includes Boulder Creek, Cross Creek, Denny Creek, Kroenke, Browns Pass, Powderhorn, Pitts Meadow, Bakers Bridge, and Tenmile Granites, Quartz Monzonites, or Granodiorites; also, unnamed granitic rocks

State	Colorado
Name	Granitic rocks of 1700-m.y. age group
Geologic age	Early Proterozoic
Lithologic constituents	Major Igneous > Plutonic > Granitic > Granite Minor Igneous > Plutonic > Granitic > Granodiorite Igneous > Plutonic > Syenitic > Quartz-monzonite
References	Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.
NGMDB product	NGMDB product page for 68589
Counties	Boulder - Chaffee - Clear Creek - Conejos - Costilla - Custer - Delta - Douglas - Eagle - El Paso - Fremont - Garfield - Gilpin - Grand - Gunnison - Huerfano - Jackson - Jefferson - Lake - La Plata - Larimer - Las Animas - Mesa - Montrose - Park - Pitkin - Rio Blanco - Routt - Saguache - San Juan - Summit - Teller

Granitic rocks of 1700-m.y. age group

Tweto, Ogden, 1979, Geologic Map of Colorado: U.S. Geological Survey Special Geologic Map, scale 1:500,000.