Why Is Rhyolite Texture Different From Granite

Crystallization may sometimes have begun while the magma was deeply buried.

Why is rhyolite texture different from granite. A plutonic igneous rock is one that crystallises. Rhyolite extrusive igneous rock that is the volcanic equivalent of granite most rhyolites are porphyritic indicating that crystallization began prior to extrusion. The minerals that make up the composition of this rock are mica feldspar quartz and hornblende. Both are felsic igneous rocks meaning they form from molten rock that is rich in silica sodium potassium and aluminum.

Oʊ ry ə lyte ry oh is an igneous volcanic rock of felsic silica rich composition typically 69 sio 2 see the tas classification it may have any texture from glassy to aphanitic to porphyritic the mineral assemblage is usually quartz sanidine and plagioclase in a ratio 2 1 see the qapf diagram. So i m going to make a general comment and say that a granite is genetically the same has the same composition as a rhyolite please don t take this as always true but it is a close enough estimate in most cases. As nouns the difference between granite and rhyolite is that granite is rock a group of igneous and plutonic rocks composed primarily of feldspar and quartz usually contains one or more dark minerals which may be mica pyroxene or amphibole granite is quarried for building stone road gravel decorative stone and tombstones common colors are gray white pink and yellow brown while. Rhyolite is similar in composition and appearance to granite but it forms through a.

It is composed predominantly of quartz k feldspar and biotite. In such cases the rock may consist principally of well developed large single crystals phenocrysts at the time of extrusion. L aɪ t ˈ r aɪ. Granite vs rhyolite characteristics assist us to distinguish and recognize rocks.

The rock received its name from german geologist ferdinand von richthofen better known as the red baron a world war i flying ace the word rhyolite comes from the greek word rhýax a stream of lava with the suffix ite given to rocks. Though some rocks look identical they have certain characteristics which distinguish them from others. Characteristics of rocks include texture appearance color fracture streak hardness etc. Why is the texture of rhyolite different from the texture of granite.

It may have any texture from glassy aphanitic porphyritic and by the orientation of small crystals reflecting the lava flow. There is distinct porphyritic texture characterized by sanidine and rare quartz plagioclase and biotite. Rhyolite an intrusive rock cools more slowly than granite so it has larger crystals. Rhyolite ˈ r aɪ.

So if we assume the above to be true then the only difference between the rocks is that one is plutonic and the other is volcanic. Rhyolite is a silica rich igneous rock found throughout the world. Rhyolite an intrusive rock cools more quickly than granite so it has smaller crystals. Rhyolite rocks bear a striking resemblance to granite due to being classified as felsic rocks except that rhyolite has a fine grained texture with phenocrysts which are small crystals sometimes embedded within the rock.

Rhyolite an extrusive rock cools more slowly than granite so it has larger crystals.