[2015] Audrey Young (): Rhyolite

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[2015] Audrey Young (): Rhyolite

Rhyolite was first discovered in prehistoric times, in Pennsylvania. It was named, however, by German geologist Ferdinand von Richthofen

Rhyolite is formed when granitic magma is partially cooled,and then brought to the surface to cool completely. Quartz, sanidine and plagioclase are some minerals in this rock.

Rhyolite is an extrusive igneous rock, found in almost all geological areas. It is rated a six or seven on the Moh's hardness scale, and has a very fine grain. It's texture is aphanitic.

RHYOLITE found on Google images

Rhyolite can be used for cin the construction industry, in lightwieht building materials, however it is not ideal for concrete due to it's high silica content. It can also be carved into jewellery.

Rhyolite can be anywhere from gray to pink in color!

In the 19th century, rhyolite was nicknamed "acid rock" because of high silica content

There is a ghost town in Nevada called Rhyolite.


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