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Smooth glassy rock that is formed when lava cools?
Obsidian
Rocks formed by the cooling and hardening of molten rock?
Igneous rocks are formed by the cooling and hardening of molten rock, either from volcanic activity or magma cooling below the Earth's surface. Examples include granite, basalt, and obsidian. These rocks can have coarse or fine textures depending on the rate of cooling.
What is the rock obsidian luster?
Obsidian has a glassy luster, which means it has a shiny and reflective surface similar to glass. This luster is a result of the rapid cooling of lava, which prevents the formation of crystals in the rock.
What igneous rock that cooled very quickly and is considered a glass rock?
Obsidian is an igneous rock that forms from lava cooling extremely quickly, preventing the formation of crystals. It is often referred to as a natural glass due to its lack of crystal structure.
Is obsidian a intrusive or extrusive igneous rock?
Andesite is considered an extrusive igneous rock.
What is a rock made from the cooling of magma?
Igneoous rock is made from cooling of magma. Obsidian is a classic example of igneous rock.
What rock is black and glassy and rapidly cooling lava?
obsidian
How are granite and obsidian are different?
Granite is a rock, whereas obsidian is a type of glass formed by cooling lava.
Smooth glassy rock that is formed when lava cools?
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.
Is obsidian rapidly cooling?
Yes that is why it makes that glassy look to it.
What type of rock does magma make?
Magma cools and solidifies to form igneous rocks such as granite, basalt, and obsidian depending on the cooling rate and mineral composition.
Rocks formed by the cooling and hardening of molten rock?
Igneous rocks are formed by the cooling and hardening of molten rock, either from volcanic activity or magma cooling below the Earth's surface. Examples include granite, basalt, and obsidian. These rocks can have coarse or fine textures depending on the rate of cooling.
Is obsidian rock metamorphic rock sedimentary or igneous?
Obsidian is an extrusive igneous rock, formed from rapidly cooling lava.
What igneous rock has no visible crystals?
Granite is a coarse grained igneous rock without Pyroxene.
What is the rock obsidian luster?
Obsidian has a glassy luster, which means it has a shiny and reflective surface similar to glass. This luster is a result of the rapid cooling of lava, which prevents the formation of crystals in the rock.
What is obsadian?
Obsidian is a rock that is essentially natural glass. Obsidian is formed by high volcanic heat and very fast cooling (So that crystallization has no time to occur).
