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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 igneous rock has no visible crystals?

Granite is a coarse grained igneous rock without Pyroxene.


What is dark glassy volcanic rock called?

obsidian


Smooth glassy rock?

Obsidian: Its texture is glassy. Obsidian is extrusive or volcanic, because the instantaneous cooling that produces such rocks is a surface phenomenon. Obsidian is amorphous, so, unlike true rocks, it is not composed of minerals.


What texture does obsidian have?

A glassy texture.


Is it Obsidian a natural gas?

Obsidian is a type of glassy lava not a gas.


Obsidian is a glassy form of?

Extruded lava.


What is a glassy grained extrusive rock?

Obsidian.


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.


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