Near Drummond in Granite County, Montana — The American West (Mountains)
Rattler Gulch Limestone Cliﬀs ACEC
(Area of Critical Environmental Concern)
Approximately 1635 feet of the Madison Formation are exposed in this location. It is partly composed of the fossil remains of small marine animals. Erosional processes of the bedding planes in the formation reveal ancient sea floors.
The ACEC designation means that BLM is giving these limestone cliffs special emphasis and protection. This outcropping of the Madison Formation is unique in its entire exposure. The site is used by universities and high schools for geologic study and investigations, as well as being available for public viewing and enjoyment.
Erected by Bureau of Land Management.
Location. 46° 43.634′ N, 113° 13.871′ W. Marker is near Drummond, Montana, in Granite County. Marker is on Rattler Gulch Road 2.1 miles north of I-90 Frontage Road, on the right when traveling north. Click for map. Marker is in
Other nearby markers. At least 2 other markers are within 11 miles of this marker, measured as the crow flies. Madison Limestone and the Garnet Mountains (approx. 3.9 miles away); Sand Park Cemetery (approx. 10.3 miles away).
Categories. • Natural Features •
Credits. This page originally submitted on , by Duane Hall of Abilene, Texas. This page has been viewed 284 times since then and 9 times this year. Photos: 1, 2, 3, 4, 5. submitted on , by Duane Hall of Abilene, Texas. This page was last revised on June 16, 2016.