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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. 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.

  5. Ignacio Formation - Wikipedia

    en.wikipedia.org/wiki/Ignacio_Formation

    Description. The Ignacio Formation is a complex and diverse formation, made up mostly of sandstone and mudrock with smaller amounts of carbonate rock, conglomerate, and evaporites that have been replaced by other minerals. The formation crops out in the San Juan Mountains of Colorado [1] but may be present in the subsurface over a much wider ...

  6. Dome Rock Mountains - Wikipedia

    en.wikipedia.org/wiki/Dome_Rock_Mountains

    The Dome Rock Mountains are a north-south trending range about 30 miles (48 km) long. The Palo Verde Valley borders the range on the west, adjacent to the Colorado River. Interstate 10 bisects the range connecting Ehrenberg on the Colorado River with Quartzsite to the east of the mountains. Quartzsite lies on the western edge of the La Posa ...

  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. Colorado Mineral Belt - Wikipedia

    en.wikipedia.org/wiki/Colorado_Mineral_Belt

    The Colorado Mineral Belt (CMB) is an area of ore deposits from the La Plata Mountains in Southwestern Colorado to near the middle of the state at Boulder, Colorado, and from which over 25 million troy ounces (778 t) of gold were extracted beginning in 1858. [2] The belt is a "northeast-striking zone defined by: a Proterozoic shear zone system ...

  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 ...