Near Drummond in Granite County, Montana — The American West (Mountains)
Rattler Gulch Limestone Cliffs ACEC
(Area of Critical Environmental Concern)
Photographed By Duane Hall, August 8, 2010
1. Rattler Gulch Limestone Cliffs ACEC Marker
The limestone feature (outcrop), located across the road, known as the Madison Limestone Formation, was deposited about 350 million years ago in a shallow sea. It was uplifted about 65 million years ago during the Laramide Orogeny (when the Rocky Mountains were formed.) During its uplift the cliffs were folded and faulted, adding to the geologic structure of the cliffs.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.
Topics. This historical marker is listed in this topic list: Natural Features. A significant historical year for this entry is 1635.
Location.
Photographed By Duane Hall, August 8, 2010
2. Rattler Gulch Limestone Cliffs
this page online
Other nearby markers. At least 3 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); Southern Flint Creek Valley (approx. 10.2 miles away); Sand Park Cemetery (approx. 10.3 miles away).
Photographed By Duane Hall, August 8, 2010
3. Rattler Gulch Limestone Cliffs
Photographed By Duane Hall, August 8, 2010
4. Rattler Gulch Limestone Cliffs
Photographed By Duane Hall, August 8, 2010
5. Rattler Gulch
Credits. This page was last revised on June 16, 2016. It was originally submitted on January 16, 2015, by Duane Hall of Abilene, Texas. This page has been viewed 725 times since then and 3 times this year. Photos: 1, 2, 3, 4, 5. submitted on January 16, 2015, by Duane Hall of Abilene, Texas.
