Highwood Mountains
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The Highwood Mountains cover approximately 4,659 sq km (1,799 sq mi) in north central Montana in the U.S., east of Great Falls and Benton Lake National Wildlife Refuge, at the northern end of the Lewis and Clark National Forest. [1]
Nearby are Highwood, Montana and the Missouri River above the mouth of the Marias River. The highest point in the Highwood Mountains is Highwood Baldy at 2338 meters (7670 feet). [2]
The area has volcanic origins and is rich in potash. Many of the extrusive rocks and some of the dike rocks contain abundant phenocrysts of a clear analcime that appears to be primary. Pseudoleucite is an abundant constituent of many of the igneous rocks. [3]
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![[1]](http://www.fs.fed.us/r1/lewisclark/images/vicmap.GIF){kind=link}