0
No. Rocks can be classified into three general groups:
Igneous rocks, which form from molten rock
Sedimentary rocks, which form from broken-down rocks turned back into stone
Metamorphic rocks, which form as rocks change due to heat and pressure without melting.
Igneous rocks are further divided into intrusive rocks, which cool underground, and extrusive rocks, which cool above ground. Only extrusive igneous rocks are considered volcanic.
What else can I help you with?
Are volcanic rocks sedimentary?
No. Volcanic rocks are igneous (although not all igneous rocks are volcanic). Sedimentary rocks are made of sediment naturally cemented together. However, volcanic (or extrusive igneous) rocks can be eroded into sediment, which can be cemented, compacted, or otherwise become sedimentary rock such as sandstone or conglomerate. It is then not considered igneous.
Are volcanic rocks igneous rocks?
Yes. Volcanic rocks are extrusive igneous rocks.
Are Volcanic rocks metal?
No. Volcanic rocks are made of the same materials that other rocks are.
Do igneous rocks have crystals in them?
Not all of them. Volcanic glass does not have crystals.
Are metamorphic rocks volcanic?
No. Only extrusive igneous rocks are volcanic.
What are volcanic rocks?
Volcanic rocks are classified as extrusive igneous rocks, forming from the solidification of lava.
Are intrusive rocks volcanic?
No. Volcanic rocks are extrusive. Intrusive rocks are sometimes called plutonic.
Are volcanic rocks hot?
Volcanic rocks are hot if they are freshly erupted. Otherwise, no.
Magma that is rejected during a volcanic eruption forms igneous rocks?
Magma that is ejected during a volcanic eruption forms extrusive igneous rocks. They are also referred to as volcanic rocks.
Is all rocks made of minerals?
No, not all rocks are made of minerals. Rocks can be composed of minerals, but there are also rocks that are formed from non-mineral materials such as volcanic glass or organic matter.
Does gneiss have minerals in it?
Yes. All rocks, apart from coal and some glassy volcanic rocks, contain minerals.
What are igneous rocks that form over the surface?
Rhyolititcen rocks.
