Rocky Mountain Section of the Geological Society of America
One of six volumes generated by each GSA section for the Decade of North American Geology (DNAG) project, this Centennial Field Guide contains descriptions of 100 sites or site clusters representing outstanding geologic locations in northern Arizona, Colorado, Idaho, Montana, North Dakota, New Mexico, South Dakota, Utah, Wyoming, and Alberta.
Marysville stock and contact aureole, western Montana
Published:January 01, 1987
The Marysville stock is about 17 mi (27 km) northwest of Helena, Montana, in Lewis and Clark County (Fig. 1). To reach the area from Helena, go7mi(11 km) north on 1–15 to exit 200 and turn west (left) off the exit ramp onto Montana 279 (Lincoln Road). At 8.5mi(14km) from 1-15, turn southwest (left) onto a gravel road marked by signs for Marysville and the Belmont Ski Area. The old mining town of Marysville is about 6 mi (10 km) from this turnoff. Most of the area is readily accessible by passenger car although some areas are accessible only...