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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
[30] [31] In recent years, budget constraints have forced the USGS to rely on donations of time by civilian volunteers in an attempt to update its 7.5-minute topographic map series, and USGS stated outright in 2000 that the program was to be phased out in favor of The National Map [32] (not to be confused with the National Atlas of the United ...
The Judith River is a tributary of the Missouri River, approximately 124 mi (200 km) long, running through central Montana in the United States.It rises in the Little Belt Mountains and flows northeast past Utica and Hobson.
The Two Medicine River is a tributary of the Marias River, approximately 60 mi (97 km) long, in northwestern Montana in the United States. It rises in the Rocky Mountain Front in Glacier National Park at the continental divide and flows east, down from the mountains and across the Blackfeet Indian Reservation .
The Judith River Formation is a fossil-bearing geologic formation in Montana, and is part of the Judith River Group.It dates to the Late Cretaceous, between 79 and 75.3 million years ago, [4] corresponding to the "Judithian" land vertebrate age.
The Williston Basin is a large intracratonic sedimentary basin in eastern Montana, western North Dakota, South Dakota, southern Saskatchewan, and south-western Manitoba that is known for its rich deposits of petroleum and potash. The basin is a geologic structural basin but not a topographic depression; it is transected by the Missouri River ...
The Stillwater is often overlooked, but is one of Montana's greatest fisheries. Despite its misleading name, the Stillwater's most popular stretches contain class II and III whitewater. While float fishing from a raft is a common way to fish the river, it is recommended that only experienced rowers attempt to navigate it.
At the maximum water levels of the Hwy 382 through the prairie to information sign at mile marker13. Multiple long ridges of sediment, 25 feet (7.6 m) height and 100 feet (30 m) apart. Average height between 13 and 30 feet (4.0 and 9.1 m). Formed during the outflow of water during a break in the ice dam. [11]