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Andesite has large crystals surrounded by fine grained minerals. which term describes the texture of andesite?
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How andesite is formed?
Andesite can be formed by fractional crystalization (crystals of olivine and other mafic minerals forming and falling out) of basaltic magma, or by assimilation of wall rocks into basaltic magma (hot magma melting side wall rocks and incorporating it into the magma).
What gives basalt its dark color?
Andesite gets its dark colour from the way its crystals stick together.
What is a common location for Rhyolite rock?
You find rhyolite rock wherever you find andesite volcanoes or extinct andesite volcanoes. Topaz Mountain in western Utah (3 hours west of Provo) is a rhyolite mountain complete with garnet, topaz crystals, beryl, and other gemstones and minerals. If there are no dormant or extinct volcanoes in your area, your chances of finding rhyolite are slim to none.
How a doline is formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
what is a type of igneous rock that cools quicklymmmmmm?
Well when an igneous rock cools quickly, it ends up being fine-grained, as there wasn't any time for large crystals to form. Examples include andesite, basalt, tuff, scoria, etc. Obsidian is also the result of lava cooling extremely quickly, to the point where no crystals whatsoever were able to form.
Andesite has small crystals because?
Andesite has small crystals because it cools quickly.
Why do andesite have small crystals?
Andesite is an Igneous Rock. It has small crystals because it cooled quickly d;D
Are large crystals found in diorite?
diorite crystals are large and andesite crystals are small
Compare the mineral composition of diorite with the mineral composition of andesite?
Both andesite and diorite are igneous rocks with an intermediate color index. Diorite; however, is intrusive and phaneritic, whereas andesite is aphanitic and extrusive. Andesite is said to be the extrusive equivalent of diorite. Diorite is made up of plagioclase feldspar and ferromagnesian mineral crystals, mainly amphibole. Contrarily, andesite may resemble rhyolite, meaning it presents a need for microscopic examination to see its mineral crystals. The two have a composition of plagioclase feldspar and amphibole, but it is much more difficult to detect in andesite.
What is andesite?
Andesite is an extrusive igneous or volcanic rock with an intermediate composition, meaning it has moderate levels of silica, magnesium, iron, and sodium. Andesite porphyry is andesite that contains visible crystals, indicating that it had already begun to cool before erupting.
How andesite is formed?
Andesite can be formed by fractional crystalization (crystals of olivine and other mafic minerals forming and falling out) of basaltic magma, or by assimilation of wall rocks into basaltic magma (hot magma melting side wall rocks and incorporating it into the magma).
What gives basalt its dark color?
Andesite gets its dark colour from the way its crystals stick together.
What is a common location for Rhyolite rock?
You find rhyolite rock wherever you find andesite volcanoes or extinct andesite volcanoes. Topaz Mountain in western Utah (3 hours west of Provo) is a rhyolite mountain complete with garnet, topaz crystals, beryl, and other gemstones and minerals. If there are no dormant or extinct volcanoes in your area, your chances of finding rhyolite are slim to none.
What are two properties used to classify igneous rock?
Igneous rocks are usually classified by their chemical composition (acidic or basic), and by whether they formed underground (intrusive, characterised by large mineral crystals) or on the surface (extrusive, made of tiny, microscopic crystals). For instance, basalt is a basic, extrusive rock, and granite is an acidic, intrusive rock.
Where is pigeonite normally found?
Pigeonite is normally found in igneous rocks such as dacite and andesite which are both extrusive igneous rocks. Pigeonite is found in meteorites such as eucrite and achondrite. In volcanic rocks it is found as phenocrysts and as crystals in meteorites.
How a doline is formed?
Dolerite is a dark, igneous rock. It is formed under basaltic volcanoes, like those at mid-ocean ridges. It cools pretty quickly when magma moves into the fractures and weak zones below a volcano. Because it cools so quickly, you can see large crystals on the rock. Once the magma moves into the rock, it forms dikes and or sills.
what is a type of igneous rock that cools quicklymmmmmm?
Well when an igneous rock cools quickly, it ends up being fine-grained, as there wasn't any time for large crystals to form. Examples include andesite, basalt, tuff, scoria, etc. Obsidian is also the result of lava cooling extremely quickly, to the point where no crystals whatsoever were able to form.
