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Is volcanic glass an intrusive or extrusive igneous rock?
Volcanic material is extrusive.
Is tuff an extrusive igneous rock?
Yes. Tuff is an extrusive igneous rock formed by explosive volcanic eruptions.
What type of rock is a volcano from?
Volcanic rock is extrusive igneous rock.
What Rock Volcanic activity creates what?
Volcanic activity produces extrusive igneous rock.
Is Rhyolite Porphyry an intrusive or extrusive rock?
Rhyolite is a felsic volcanic rock.
What are rocks called that formed from volcanic process?
Those would be igneous rocks. Extrusive igneous rocks.
What does extrusive igneous rock form from?
An extrusive igneous rock is when a volcano erupts and magma flows down, then cools, forming rocks.
What igneous rock has crystals that are not visible?
Extrusive igneous rock consists of mineral crystals that are not observable with the naked eye. Obsidian is an extrusive igneous rock (volcanic glass) where there technically are no mineral crystals.
Is obsidian a intrusive or extrusive igneous rock?
Andesite is considered an extrusive igneous rock.
What igneous rock is at the earths surface that is weathered and wears away?
Extrusive (volcanic) and exposed plutonic igneous rock.
What igneous rocks is produced by lava that solidifies at the earth's surface?
Extrusive (Volcanic) igneous rock.
You notice a rock that was formed from a nearby volcanic eruption What kind of rock is this?
It is an extrusive igneous rock.
