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Biography
Other usesunreferenced|date=October 2008A cinder is a pyroclastic rock|pyroclastic material. Cinders are extrusive igneous rock s. Cinders are similar to pumice , which has so many cavities and is such low-density that it can float on water. The color of cinder is brown.
Characteristics
The following Geology|geologic characteristics define a cinder:
Uncemented
Vitric
Having bubble-like cavities, called vesicle (geology)|vesicles
Measuring not less than 2.0 millimeters in at least one dimension
Apparent specific gravity between 1.0 and 2.0
Typical cinders are red or black in color.
Contain numerous gas bubbles "frozen" into place as magma exploded into the air and then cooled quickly.
Uses
Cinders have been used on track surfaces and roads to provide additional traction in winter conditions. Cinders are also employed as inorganic mulch in xeriscaping , because of excellent drainage properties and resistance to erosion. In this context, they are referred to frequently with the name "lava rock". This is why cinder is used in roads.
See also
Cinder block
Cinder cone
Cinder track
Igneous rock
Lapilli
Scoria
Tephra
Ye Olde Cinder House
Category:Volcanology
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