What is Felsite used for?
What is Felsite used for?
FELSITE, in petrology, a term which has long been generally used by geologists, especially in England, to designate finegrained igneous rocks of acid (or subacid) composition.
What is the chemical composition of Felsite?
Felsite is a fine-grained, volcanic rock of light colour and is composed mainly of feldspar and quartz. It may also contain phenocrysts (>>>porphyry).
Is Felsite igneous?
A fine-grained, light-colored igneous rock, composed chiefly of feldspar and quartz. A light-colored, dense, fine-grained igneous rock consisting mainly of feldspar and quartz.
What is Felsitic texture?
Felsitic texture is a microcrystalline texture of the ground-mass of acid extrusive rocks. The groundmass of such rocks consists of minute crystalline formations, such as grains or fibers, and finely dispersed vitreous material.
Where can Felsite be found?
The name Darrough Felsite was originally assigned to a body of fine-grained quartzofeldspathic igneous rock probably greater than 3 km thick that is exposed continuously over 100 km2 in the southern Toiyabe Range of central Nevada.
How is Felsite made?
Felsite is a field term for a light-colored rock that typically requires petrographic examination or chemical analysis for more precise definition. This rock is typically of extrusive origin, formed by compaction of fine volcanic ash, and may be found in association with obsidian and rhyolite.
Where is Felsite formed?
The name Darrough Felsite was originally assigned to a body of fine-grained quartzofeldspathic igneous rock probably greater than 3 km thick that is exposed continuously over 100 km2 in the southern Toiyabe Range of central Nevada. The Darrough was supposed to consist mostly of intrusive rocks of probable Permian age.
How is Felsite formed?
This rock is typically of extrusive origin, formed by compaction of fine volcanic ash, and may be found in association with obsidian and rhyolite. In some cases, it is sufficiently fine-grained for use in making stone tools.
Is Felsite a rock or mineral?
Felsite is a very fine-grained volcanic rock that may or may not contain larger crystals. Felsite is a field term for a light-colored rock that typically requires petrographic examination or chemical analysis for more precise definition.
Is Felsite lava thin?
Felsic lavas are not as hot, high in silica and volatiles, and have a high viscosity. They are thick and gooey and resist flowing.
What is the meaning of felsite?
Definition of felsite. : a dense igneous rock consisting almost entirely of feldspar and quartz.
What are felsite blocks made of?
The rough felsite blocks of which they were composed were surprisingly large, considering the diminutive size of the cabins. We found, besides, a few cores of felsite and some shapeless flakes and several fragments of large metates. The blocks were lava and hard felsite, measuring one and a half to three feet.
What is the composition of quartz felsite?
The mass of the rock consists of a fine-grained matrix of felsic materials, particularly quartz, sodium and potassium feldspar, and may be termed a quartz felsite or quartz porphyry if the quartz phenocrysts are present.
https://www.youtube.com/c/FelsiteNet
