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The Gates of the Mountains Wilderness is located in the U.S. state of Montana.Created by an act of Congress in 1964, the wilderness is managed by Helena National Forest.A day use campground near the Gates of the Mountains, Meriwether Picnic site, is named in honor of Meriwether Lewis.
The rocks serve as an important aquifer as well as an oil reservoir in places. The Madison and its equivalent strata extend from the Black Hills of western South Dakota to western Montana and eastern Idaho , and from the Canada–United States border to western Colorado and the Grand Canyon of Arizona .
The geology of Montana includes thick sequences of Paleozoic, Mesozoic and Cenozoic sedimentary rocks overlying ancient Archean and Proterozoic crystalline basement rock. . Eastern Montana has considerable oil and gas resources, while the uplifted Rocky Mountains in the west, which resulted from the Laramide orogeny and other tectonic events have locations with met
The largest nearby city is Helena, Montana, which is the headquarters location for the forest. The forest was the site of the 1949 Mann Gulch fire , which claimed the lives of 13 firefighters and which was the subject of both Norman Maclean 's book Young Men and Fire and James Keelaghan 's folk song "Cold Missouri Waters."
The Crazy Mountains experience two distinct igneous settings that include mildly saturated or heavily saturated alkalic rocks. Both of these igneous series derive from mantle sources with mafic characteristics. These rocks are not a result from partial melting but rather derived from distinct source regions. Highwood Mountain, Montana
The Mann Gulch fire was a wildfire reported on August 5, 1949, in a gulch located along the upper Missouri River in the Gates of the Mountains Wilderness (then known as the Gates of the Mountains Wild Area), Helena National Forest, in the U.S. state of Montana.
The volcanic Elkhorn Mountains are a large mass of forested lava associated with the batholith. The batholith is composed of at least seven, and possibly as many as 14, discrete rock masses called plutons, which had formed beneath the Earth's surface during a period of magma intrusion about 73 to 78 million years ago (Late Cretaceous time). [1]
Beaverhead Rock, also known as Point of Rocks, is a rock formation overlooking the Beaverhead River in Montana protected as Beaverhead Rock State Park. It is located on Montana State Highway 41, twelve miles (19 km) south of Twin Bridges, Madison County. It was added to the National Register of Historic Places in 1970. [3]