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What is a glassy rock?
Glassy rocks are rocks that have cooled and solidified quickly, without forming crystals. This rapid cooling prevents mineral crystals from growing, resulting in a smooth and glass-like texture. Obsidian and pumice are examples of glassy rocks.
What texture of obsidian?
Obsidian is an extrusive rock that cooled very rapidly without forming crystals. As a result, obsidian has a smooth, shiny texture of a thick piece of glass.
What is dark glassy volcanic rock called?
obsidian
Some extrusive igneous rocks such as obsidian are glassy because they are what?
They cool to quickly for crystals to form.
What texture does obsidian have?
A glassy texture.
Is it Obsidian a natural gas?
Obsidian is a type of glassy lava not a gas.
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 a glassy grained extrusive rock?
Obsidian.
Where does obsidian rock cools down?
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.
What is smooth glassy lava called?
Smooth glassy lava is called obsidian. It forms when lava cools quickly, preventing crystals from forming, resulting in a glassy texture. Obsidian is typically black in color but can also appear in various shades of brown, green, or red.
What is a glassy fine-graind extrusive rock?
obsidian
Smooth glassy rock that is formed when lava cools?
Obsidian
