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What is the parent rock of obsidian?
the parent rock of obsidian is magma, because it is made from quickly-cooling magma after a volcanic eruption.
Smooth glassy rock that is formed when lava cools?
Obsidian
Explain pegmatite is coarse grained with large crystals basalt is fine grained with small crystals and obsidian has no crystals?
Crystal size in these rock types is determined by their rate of cooling. Pegmatites have large crystals due to very slow cooling. Obsidian has microscopic crystals due to almost instantaneous cooling.
What is a specific example of a rock formed by molten material cooling?
Granite, rhyolite, obsidian, basalt, pumice, gabbro, diorite; all examples of igneous rock that by definition forms from the cooling of molten rock.
Which igneous rocks would be formed by the fastest cooling of lava?
Glassy textured extrusive igneous rock, such as obsidian.
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 is the parent rock of obsidian?
the parent rock of obsidian is magma, because it is made from quickly-cooling magma after a volcanic eruption.
What rock is black and glassy and rapidly cooling lava?
obsidian
Smooth glassy rock that is formed when lava cools?
Obsidian
How are granite and obsidian are different?
Granite is a rock, whereas obsidian is a type of glass formed by cooling lava.
Explain pegmatite is coarse grained with large crystals basalt is fine grained with small crystals and obsidian has no crystals?
Crystal size in these rock types is determined by their rate of cooling. Pegmatites have large crystals due to very slow cooling. Obsidian has microscopic crystals due to almost instantaneous cooling.
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 rock metamorphic rock sedimentary or igneous?
Obsidian is an extrusive igneous rock, formed from rapidly cooling lava.
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.
What is a specific example of a rock formed by molten material cooling?
Granite, rhyolite, obsidian, basalt, pumice, gabbro, diorite; all examples of igneous rock that by definition forms from the cooling of molten 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).
What is the glassy variety of acidic magma?
Obsidian is a glassy rock formed from rapid cooling of acidic magma.
