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  2. Mineralogy of the Pikes Peak Region - Wikipedia

    en.wikipedia.org/wiki/Mineralogy_of_the_Pikes...

    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.

  3. Sioux Quartzite - Wikipedia

    en.wikipedia.org/wiki/Sioux_quartzite

    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.

  4. Ignacio Formation - Wikipedia

    en.wikipedia.org/wiki/Ignacio_Formation

    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.

  5. Dome Rock Mountains - Wikipedia

    en.wikipedia.org/wiki/Dome_Rock_Mountains

    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.

  6. Pikes Peak granite - Wikipedia

    en.wikipedia.org/wiki/Pikes_Peak_granite

    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.

  7. Quartzite - Wikipedia

    en.wikipedia.org/wiki/Quartzite

    Quartzite. Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone. [1][2] Sandstone is converted into quartzite through heating and pressure usually related to tectonic compression within orogenic belts. Pure quartzite is usually white to grey, though quartzites often occur in various shades of pink and ...

  8. Coconino Sandstone - Wikipedia

    en.wikipedia.org/wiki/Coconino_Sandstone

    Coconino Sandstone is a geologic formation named after its exposure in Coconino County, Arizona. This formation spreads across the Colorado Plateau province of the United States, including northern Arizona, northwest Colorado, Nevada, and Utah. Vertebrate tracks known as Chelichnus gigas from the Coconino Sandstone in Grand Canyon.

  9. Eureka Quartzite - Wikipedia

    en.wikipedia.org/wiki/Eureka_Quartzite

    The Eureka Quartzite is an extensive Paleozoic marine sandstone deposit in western North America that is notable for its great extent, extreme purity, consistently fine grain size of Quartzite, and its tendency to form conspicuous white cliffs visible from afar. The Eureka is commonly underlain and overlain by contrasting slope-forming ...