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Obsidian is an glassy, extrusive, igneous rock that is found in areas that have experienced rhyolitic eruptions. Obsidian is formed when the rhyolitic lava comes into contact with water. This quick-cooling results in the glassy texture of obsidian.
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∙ 15y ago
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What igneous rock cools from lava?
obsidian
What are large grains of intrusive rock that cools down slowly?
Intrusive Igneous rocks. Examples: obsidian, magma
How does obsidian get its unusual texture?
The texture of a rock depends on the rate that it cools. Obsidian cools so quickly that no crystals can form, therefore giving it a glassy texture.
What is the obsidian rock type?
Obsidian is an extrusive felsic igneous rock.
How can you tell obsidian is an igneous rock?
Obsidian is a form of glass. Glass can only form when material cools from a molten state.
How do you know that obsidian rock cools quickly?
i dont know thats why i am asking you do you know
How are obsidian rocks different from igneous rock?
Obsidian is a form of an igneous rock that forms when molten rock material cools so rapidly that atoms are unable to arrange themselves into a crystalline structure.
Smooth glassy rock that is formed when lava cools?
Obsidian
How is obsidian glass made?
Obsidian, or "volcanic glass," is made when molten rock comes out of a volcano and cools so quickly that no crystalline structure has time to form. This makes obsidian an extrusive igneous rock. The cooling occurs right at the surface.
Can Obsidian turn into Granite?
Obsidian and Granite are both igneous rocks so unless the Obsidian rock goes back into the magma and cools slower it can possibly form into granite.
What rock is formed when lava cools down?
igneous rock is formed when lava cools down
Is obsidian a sedimentary rock igneous rock or a metamorphic rock?
obsidian is an igneous rock, it is not formed from sediment, or a rock going under heat and pressure for the second time it is formed when a volcano erupts and it cools very quickly giving it a smooth glossy surface like glass.
