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What igneous rock cools from lava?
obsidian
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.
Do obsidian rock cool quickly?
Yes, obsidian rock cools quickly. It is formed from lava that cools rapidly upon exposure to air or water, preventing the formation of crystal structures. This rapid cooling results in its glassy texture and characteristic smooth surface. As a result, obsidian is considered an extrusive igneous rock.
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.
What is the parent rock of obsidian?
Obsidian is formed from volcanic lava that cools quickly with minimal crystal growth. It is primarily derived from rhyolitic magma that cools rapidly on the Earth's surface, leading to the formation of a glassy rock without distinct mineral crystals.
Is obsidian a metamorphic rock?
Obsidian is an igneous rock.So the answer is YES.
Smooth glassy rock that is formed when lava cools?
Obsidian
What rock forms when melted rock from inside the earth cools and hardens?
Igneous rock forms when melted rock from inside the Earth cools and hardens. This process can happen either beneath the Earth's surface, forming intrusive igneous rock, or at the surface, forming extrusive igneous rock. Examples include granite, basalt, and obsidian.
Is obsidian intrusive or extrusive rock?
Obsidian is intrusive because it was cooled below the ground.
