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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]
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 Upper Country News-Reporter: Cambridge and Midvale: Weekly Created by merger of Cambridge News (est. 1922) and the Midvale Reporter (est.1909). [4] Cambridge News was a rename of The Idaho Citizen, one of the oldest weekly newspapers in Idaho, founded in 1889. The Cambridge News Office (1912) is listed on the National Register of Historic ...
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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.
UTC time: 1983-10-28 14:06:09: ISC event: 567352: USGS-ANSSComCat: Local date: October 28, 1983 (): Local time: 08:06 MDT [1]: Magnitude: 6.9 M w [1]: Depth: 16 km (9.9 mi) [2] Epicenter: 2]: Fault: Lost River Fault [3]: Type: Normal [3]: Areas affected: Central Idaho United States: Total damage: $12.5 million [4]: Max. intensity: MMI IX (Violent) [4]: Landslides: Yes: Aftershocks: 5.6 M w Oct ...
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Joints in the Almo Pluton, City of Rocks National Reserve, Idaho. The Idaho Legislature declared Section 36 within City of Rocks as a state park under the jurisdiction of the Idaho Land Board on February 27, 1957. In 1964, a much larger area (more than 12,000 acres (49 km 2)) was designated a National Historic Landmark.