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For example, amazonite can be found next to Barr Trail, the main hiking route to the summit of Pikes Peak. The most famous collecting area on the Peak is Glenn Cove, a glacial cirque located at 11,000 feet (3,400 m) on the north side of the mountain. Quartz crystals, amazonite and topaz crystals can be found in pockets on steep cliffs in this area.
Pikes Peak granite is a 1.08 billion year old Late-Precambrian geologic formation found in the central part of the Front Range of Colorado.It is a coarse-grained pink to light red syenogranite with minor gray monzogranite, and it has a distinctive brick-red appearance where it outcrops.
The Ignacio Formation ( Ingacio Quartzite) is a geologic formation that crops out in the San Juan Mountains of southwestern Colorado. Long thought to be Cambrian in age, the formation is now thought to be upper Devonian in age, based on detrital zircon geochronology and other evidence.
Sioux Quartzite at Falls Park, Sioux Falls, South Dakota Cross-bedding in the Sioux Quartzite, Blue Mounds State Park, Minnesota, United States.. The Sioux Quartzite is a Proterozoic quartzite that is found in the region around the intersection of Minnesota, South Dakota, and Iowa, and correlates with other rock units throughout the upper midwestern and southwestern United States.
Franktown Cave is located 25 miles (40 km) south of Denver, Colorado on the north edge of the Palmer Divide. It is the largest rock shelter documented on the Palmer Divide, which contains artifacts from many prehistoric cultures. Prehistoric hunter-gatherers occupied Franktown Cave intermittently for 8,000 years beginning about 6400 BC The site ...
In the United States, formations of quartzite can be found in some parts of Pennsylvania, the Washington DC area, eastern South Dakota, Central Texas, [9] southwest Minnesota, [10] Devil's Lake State Park in the Baraboo Range in Wisconsin, [11] the Wasatch Range in Utah, [12] near Salt Lake City, Utah and as resistant ridges in the Appalachians ...
The Tyson Wash drainage flows north at the western perimeter of the La Posa Plain and turns westwards at the north end of the Dome Rock Mountains to meet the Colorado River region. [ 1 ] Cunningham Mountain at 3,314 feet (1,010 m) is the highest peak of the Dome Rock Mountains and is located about 6 miles (10 km) south of Interstate 10.
The Hakatai Shale is part of a conformable sequence of sedimentary strata that comprise the Unkar Group. The Unkar Group is about 1,600 to 2,200 m (5,200 to 7,200 ft) thick and composed, in ascending order, of the Bass Formation, Hakatai Shale, Shinumo Quartzite, Dox Formation, and Cardenas Basalt. In ascending order, the Unkar Group is ...
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