Amazonite, also known as amazonstone, is a green tectosilicate mineral, a variety of the potassium feldspar called microcline. Its chemical formula is KAlSi3O8, which is polymorphic to orthoclase.
A pegmatite is an igneous rock showing a very coarse texture, with large interlocking crystals usually greater in size than 1 cm (0.4 in) and sometimes greater than 1 meter (3 ft). Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite. However, rarer intermediate composition and mafic pegmatites are known.
Jefferson County is a county located in the U.S. state of Colorado. As of the 2020 census, the population was 582,910, making it the fourth-most populous county in Colorado. The county seat is Golden, and the most populous city's Lakewood.
The Town of Marble is a Statutory Town in Gunnison County, Colorado, United States. The town population was 133 at the 2020 United States Census.
Morrison is a home rule municipality in Jefferson County, Colorado, United States. The population was 396 at the 2020 census.
Horsetooth Mountain is a mountain summit in the foothills of the Front Range of the Rocky Mountains of North America. The 7,259-foot (2,213 m) peak is located in the Horsetooth Mountain Open Space, 7.0 miles (11.2 km) west of downtown Fort Collins in Larimer County, Colorado, United States.
Berrian Mountain is a mountain summit in the Front Range of the Rocky Mountains of North America. The 9,151-foot (2,789 m) peak is located 0.9 miles (1.5 km) north-northeast of the community of Aspen Park in Jefferson County, Colorado, United States.
Bradbury Mountain State Park is a public recreation area in the town of Pownal, Cumberland County, Maine, managed by the Department of Agriculture, Conservation and Forestry. The state park covers 730 acres (300 ha).
S P Crater is a cinder cone volcano in the San Francisco volcanic field, 25 miles (40 km) north of Flagstaff, Arizona, United States. It is surrounded by several other cinder cones which are older and more eroded. It is a striking feature on the local landscape, with a well-defined lava flow that extends for 4.3 miles (7 km) to the north. American astronauts use the crater to train for moonwalking.
Silver Creek is a mining ghost town in Clear Creek County, Colorado, United States. The town never had a post office of its own, but received its mail via the Lawson post office. The town is only accessible via unimproved road. Most of the mines were located upstream from the town.
Lone Cone is a prominent mountain summit at the western end of the San Miguel Mountains range of the Rocky Mountains of North America. The 12,618-foot (3,846 m) peak is located 24.2 miles (38.9 km) west by south of the Town of Telluride, Colorado, United States, on the drainage divide separating San Juan National Forest and Dolores County from Uncompahgre National Forest and San Miguel County.
Little Cone is a prominent mountain summit in the San Miguel Mountains range of the Rocky Mountains of North America. The 11,988-foot (3,654 m) peak is located in Uncompahgre National Forest, 15.0 miles (24.1 km) west of the Town of Telluride in San Miguel County, Colorado, United States.
Park Cone, elevation 12,106 ft (3,690 m), is a summit in the Sawatch Range of central Colorado. The mountain is northeast of Gunnison in the Gunnison National Forest.
Green Mountain is a mesa on the eastern flank of the Front Range of the Rocky Mountains of North America. The 6,854-foot (2,089 m) mesa summit is located in William Frederick Hayden Park in the City of Lakewood, Colorado, United States, 4.0 miles (6.5 km) west of the municipal center of Lakewood in Jefferson County.
Mount Morrison is a foothill on the eastern flank of the Front Range of the Rocky Mountains of North America. The 7,881-foot (2,402 m) peak is located in Red Rocks Park, 1.9 miles (3.0 km) northwest by west of the Town of Morrison in Jefferson County, Colorado, United States. Red Rocks Amphitheatre is located on the eastern side of the mountain.
Blue Creek Canyon is a narrow, steep-walled canyon in Gunnison County, Colorado. It lies between Fitzpatrick Mesa and Blue Mesa and is south of Morrow Point Reservoir and southeast of Cimarron, Colorado. U.S. Highway 50 goes through the canyon. Gunnison County Road 867 intersects with Highway 50 near the middle of the canyon.
The Tin Mountain pegmatite is an igneous intrusion located in the southern Black Hills, South Dakota. It is a part of the Harney Peak Granite dome that formed in the Late Paleoproterozoic around 1.7 billion years ago. The Harney Peak Granite system includes thousands of pegmatites, one of which is the Tin Mountain. The Tin Mountain pegmatite is rich in lithium, but was first mined in search of tin, which gave the mountain its name.
