Obsidian
Sedimentary Rocks. 75% of rocks exposed to the surface are sedimentary.
Sedimentary, Igneous and Metamorphic.
== == Extrusive igneous rocks are formed from the solidification of lava on or above the surface. Rapid cooling from exposure to air or water results in rapid crystallization of their component minerals, normally creating a fine grained texture as opposed to intrusive igneous rocks which have a coarser texture. Examples of extrusive igneous rocks would include obsidian, pumice, basalt, and rhyolite.
A rock is considered igneous if it formed directly from the cooling of molten rock.
Igneous rocks are rocks formed by magma. so the best place to find igneous rocks would be by volcanoes or where a volcano once erupted.
Near igneous rocks, you might find other igneous rocks, metamorphic rocks, or sediments that were derived from the erosion and weathering of igneous rocks. Additionally, hot springs, geysers, and volcanic activity may be present in areas with igneous rocks.
igneous rocks
You would find extrusive igneous rocks. Beyond that it depends on the volcano.
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Igneous rocks are rocks formed by magma. so the best place to find igneous rocks would be by volcanoes or where a volcano once erupted.
Rhyolititcen rocks.
Igneous rocks are formed by the solidification of molten materials.
There are lots of pictures of rocks. In order to find pictures you type "pictures of igneous rocks" into your search engine and click on the "images" tab to see them.
Sedimentary rock can be made up partially of igneous clasts, but igneous rock is igneous rock.
You would expect to find an igneous rock with small crystals near the Earth's surface where the rock cools relatively quickly, such as in volcanic eruptions or magma intrusions that do not have much time to grow large crystals. These rocks are known as volcanic or extrusive igneous rocks.
Igneous rocks