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Since 1919, the Idaho Geological Survey (formerly Bureau of Mines and Geology) has studied and reported on the general and environmental geology of the state. The Survey also studies and reports on the water (both surface and ground), mineral data, and energy assets of the state.
The Idaho Batholith is a granitic and granodioritic batholith of Cretaceous-Paleogene age that covers approximately 25,000 square kilometres (9,700 sq mi) of central Idaho and adjacent Montana. The batholith has two lobes that are separate from each other geographically and geologically.
The historic district is named for Map Rock, [2] a massive basalt rock covered in petroglyphs, named by Robert Limbert in the early 1920s. Limbert believed that the rock depicts a map of the Snake River valley, and some authors have suggested that if it is a map then it may be the oldest map in the world.
A specimen of stibnite. The Stibnite Mining District sits atop the Idaho Batholith, one of the signature features of Idaho’s unique geology.The Idaho Batholith is nearly 14,000 square miles (36,000 km 2) of granite, formed from the collision of the oceanic plate and the North American Plate around 100 million years ago during the Cretaceous period. [10]
The Snake River Plain is a geologic feature located primarily within the U.S. state of Idaho. It stretches about 400 miles (640 km) westward from northwest of the state of Wyoming to the Idaho-Oregon border. The plain is a wide, flat bow-shaped depression and covers about a quarter of Idaho.
The counties of Idaho. The U.S. state of Idaho borders six other U.S. states and one Canadian province. The states of Washington and Oregon are to the west, Nevada and Utah are to the south, and Montana and Wyoming are to the east. Idaho also shares a short border with the Canadian province of British Columbia to the north.
There are at least 115 named mountain ranges in Idaho. Some of these ranges extend into the neighboring states of Montana , Nevada , Oregon , Utah , Washington , and Wyoming . Names, elevations and coordinates from the U.S. Geological Survey , Geographic Names Information System .
The per capita income for the city was $14,051. About 14.0% of families and 12.8% of the population were below the poverty line, including 3.8% of those under the age of eighteen and 6.5% of those sixty five or over. 1907 Geologic map of Wardner, and the locations of the Last Chance, Bunker Hill, and Sullivan mines