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Scoria is a pyroclastic, highly vesicular, dark-colored volcanic rock formed by ejection from a volcano as a molten blob and cooled in the air to form discrete grains called clasts. [ 1 ] [ 2 ] It is typically dark in color (brown, black or purplish-red), and basaltic or andesitic in composition.
The volcanic field consists of two lava flows, the Broken Back flow and the Carrizozo lava flow (Carrizozo Malpais), the second youngest in New Mexico. [5] Both lava flows originated from groups of cinder cones. The Broken Back flow is approximately 16 kilometres (10 mi) long and the Carrizozo, one of the largest in the world, is 68 kilometres ...
Black Mesa State Park is an Oklahoma state park in Cimarron County, near the western border of the Oklahoma panhandle and New Mexico. The park is located about 15 miles (24 km) away from its namesake, Black Mesa, the highest point in Oklahoma (4,973 feet (1,516 m) above sea level). The mesa was named for the layer of black lava rock that coats ...
The terms lava stone and lava rock are more used by marketers than geologists, who would likely say "volcanic rock" (because lava is a molten liquid and rock is solid). "Lava stone" may describe anything from a friable silicic pumice to solid mafic flow basalt, and is sometimes used to describe rocks that were never lava, but look as if they ...
The original locations had a black lava rock exterior with a red shingled roof. Most older locations have covered the rock exterior to conform with the current orange stucco appearance. During the 1970s and 1980s, the company occasionally licensed characters from the Popeye comic strip to use in its advertising.
Lava may be erupted at a volcano or through a fracture in the crust, on land or underwater, usually at temperatures from 800 to 1,200 °C (1,470 to 2,190 °F). The volcanic rock resulting from subsequent cooling is also often called lava. A lava flow is an outpouring of lava during an effusive eruption.
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