Igneous rocks are those that have solidified from molten rock, such as pumice, granite, basalt, obsidian, rhyolite.
Igneous rock is volcanic. Earth had volcanoes - lots of volcanoes - long before it had appreciable water. Water is necessary for sedimentary rocks, and sedimentary rocks are necessary for metamorphic...
Well The Igneous Rock: When it Forms Underground the Pressure combines with Large crystals :)
Yes. Because Igneous rocks were created before sedimentary and metamorphic rock.
yes
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