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Andesite typically has a groundmass ~ 50% of grains <.25mm of metallic oxides and quartz interspersed with larger phenocrysts of pyroxene and plagioclase feldspar. Other accesory minerals may be present.
Wiki User
∙ 15y ago
Wiki User
∙ 7y agoBecause it cooled quickly in a volcano and formed from molten lava.
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How big is a million grains of sand?
A million grains of sand is not very big at all. A million grains of sand can fit in a single small bucket.
Does andesite cool quickly or slowly?
Lava will cool quickly compared to underground magma.
Is a crow herbivore?
no, because they eat seeds and stuff like that. So that means they are omnivores.
A 500 grain Bullet is how many ounces?
7000 grains/lb 437.5 grains/oz 500 grains is about 1.14 oz
What is crystallite?
Crystallites are small, often microscopic crystals that, held together through highly defective boundaries, constitute a polycrystalline solid. Metallurgists often refer to crystallites as grains.
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
Does basalt have small grains?
yes basalt has small grains
Are large crystals found in diorite?
diorite crystals are large and andesite crystals are small
Is andesite sandstone?
No. Andesite is a volcanic rock.
Does pumice have small grains?
No. Pumice does not have grains.
How old is andesite?
Andesite is not any age in particular. Some deposites of andesite may be hundreds of millions of years old. However, since andesite is volcanic, some andesite rocks may only be minutes old.
Is andesite a mineral?
No. Andesite is an extrusive igneous rock.
Is Andesite an igneous?
Yes. Andesite is an extrusive igneous rock.
Is andesite plutonic?
No. It is volcanic. The plutonic equivalent of andesite is diorite.
Is andesite phaneritic or aphanitic?
Andesite may be aphanitic or porphyritic.
What are porphyritic rocks?
Porphyritic Rocks are rocks that have big and small crystal's like the Igneous Rock "Andesite".
