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Aberdeen Quarry, an abandoned granite quarry in Gunnison County, Colorado. Its granite was used in construction of the Colorado State Capitol; Marble, Colorado, only site of Yule Marble quarrying, in the West Elk Mountains. 99.5% pure calcite, discovered in 1873, source of marble for the Tomb of the Unknowns and for the exterior of the Lincoln ...
The original rocks were then intruded by the Lilesville Granite, which crystallized in place as the country rock was metamorphosed by the heat of the magma intrusion. This resulted in the formation of the contact aureole. [6] Mica gneiss xenoliths of various sizes can be found throughout the granite, especially near the contact with the aureole ...
North Carolina Granite Corporation Quarry Complex is a historic granite quarry and national historic district located at Mount Airy, Surry County, North Carolina.The district encompasses 22 contributing buildings, 1 contributing site, and 8 contributing structures in an area approximately one mile long and 1/3 mile wide.
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Decomposed granite is a kind of granite rock that is weathered to the point that the parent material readily fractures into smaller pieces of weaker rock. Further weathering yields material that easily crumbles into mixtures of gravel -sized particles known as grus that further may break down to produce a mixture of clay and silica sand or silt ...
Sample of the granodiorite. Scale bar in upper right is 1 cm. Stone Mountain is the centerpiece of Stone Mountain State Park in North Carolina. It is a dome of exposed granite (specifically a quartz diorite to granodiorite) of Devonian age, which has intruded into the gneiss of the Precambrian Alligator Back Formation. [1]
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