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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.
Black Rock is an extinct community located in Warren Township in Warren County, Indiana, near the border with Tippecanoe County. The site, which is still listed as a populated place by the USGS, [ 2 ] is mostly forested and is part of the Black Rock Nature Preserve administered by NICHES Land Trust .
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 ...
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 ...
Collapse into a round lava lake after it drained. The source of the lava is the lavafall in the background. A forest of sensitive tree roots in the main corridor of Kazumura. Kazumura Cave is a lava tube and has been surveyed at 40.7 miles (65.5 km) long and 3,614 feet (1,102 m) deep making it the longest and deepest lava tube in the world.
Emergency responders stand near the dam in the White River south of West 16th Street on Wednesday, April 17, 2024, in Indianapolis, where the search for two kayakers is underway.
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