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Pyroclastic?
Rocks composed chiefly of fragments of volcanic material.
Do rocks often contain minerals?
Yes. Rocks are defined as combinations of minerals. The only exception to this would be some volcanic rocks that are composed mostly of glass.
Volcanic islands in the deep ocean are composed primarily of what igneous rock type?
Basaltic Igneous Rocks
What texture refers to rocks composed mainly of mineral and volcanic fragments?
pyroclastic (geology 110 midterm answer)
What are facts about Tuff rocks?
Its composed of volcanic ash & sometimes contains larger size particles such as cinders.
What do obsidian pumice rhyolite and granite have in common?
They are similar in composition
Are volcanic rocks igneous rocks?
Yes. Volcanic rocks are extrusive igneous rocks.
What is pryroclastic materials?
Pyroclastic material is material that emanates from a volcano. It is composed of gases, volcanic ash, lava fragments and rocks.
How are Ocean floor rocks are different from continental rocks?
Oceanic crust is composed primarily of the dense volcanic rock basalt. Continental crust is composed primarily of the intrusive igneous rock granite, less dense than basalt.
Are Volcanic rocks metal?
No. Volcanic rocks are made of the same materials that other rocks are.
Difference between volcanic and plutonic rocks?
Plutonic rocks solidify and crystallize beneath the Earth's surface. They are composed of large crystals. Volcanic rocks solidify and crystallize on the Earth's surface or under the sea. They are made up of very small crystals.
Are metamorphic rocks volcanic?
No. Only extrusive igneous rocks are volcanic.
