Geologic Map of the Fort Collins 30'×60' Quadrangle, Larimer and Jackson Counties, Colorado, and Albany and Laramie Counties, Wyoming
Geologic Map of the Fort Collins 30'×60' Quadrangle, Larimer and Jackson Counties, Colorado, and Albany and Laramie Counties, Wyoming Pamphlet to accompany Scientific Investigations Map 3399 U.S. Department of the Interior U.S. Geological Survey Cover. Photograph looking east from Rockhole Lake in the Rawah Wilderness down the West Branch Laramie River as it descends steeply eastward to the north-flowing upper Laramie River. High upland areas in the foreground expose granite of the Rawah batholith (XgR) with glacial till of Pinedale age (Qtp) filling the valley below. The southern end of Green Ridge, capped by a gently sloping erosion surface below the skyline, is visible just beyond the mouth of the valley. This ridge, formed by the Laramie River fault zone, separates the Laramie River drainage to the west from the Cache la Poudre River drainage to the east. South Bald Mountain is visible on the skyline to the left with Crown Point visible on the skyline to the right. The Cache la Poudre River flows east, away from view through a deep, inset canyon between these two high points below the skyline. Photograph by C.R. Ruleman, May 24, 2005. Geologic Map of the Fort Collins 30'×60' Quadrangle, Larimer and Jackson Counties, Colorado, and Albany and Laramie Counties, Wyoming By Jeremiah B. Workman, James C. Cole, Ralph R. Shroba, Karl S. Kellogg, and Wayne R. Premo Pamphlet to accompany Scientific Investigations Map 3399 U.S. Department of the Interior U.S. Geological Survey U.S. Department of the Interior RYAN K. ZINKE, Secretary U.S.
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