Actually no Igneous Rock Is Obsedian
75% Igneous 5% Sedimentary
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Igneous rocks can form anywhere, but some, like granite and gabbro, have particularly large crystals (perhaps 5 or more mm across). These are intrusive rocks, and as they are insulated by a lot of rock around them, cool very slowly, forming large crystals. They form deep, often a few kilometres, below the surface of the earth.
Sandstone, conglomerate, and breccia are examples of clastic sedimentary rock, composed of particles of other rocks.
there are only 3 kinds of rocks, igneous, metamorphic, and sedementry
Jewelry made with precious and semiprecious stones are some uses of igneous rocks. Granite is often cut into blocks to use as building blocks, or countertops.
there are only 2. intrusive igneous rock and extrusive igneous rock
75% Igneous 5% Sedimentary
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Around 5$ and 100$
To the people that are doing the "Rock Worksheet" the answer for problem #5 is in the paper but the answer is actually (what I put), "Another name for igneous rocks is the rock of fire."
There are far beyond 5 igneous rocks. Among them, there is: Pumice Obsidian Andesite Basalt Diorite Gabbro Granite Pegmatite Peridotite Rhyolite Scoria Tuff Porphyry Anorthosite Vesicular Dunite
.The oldest rock known today is the Igneous rock. .Igneous rock can be any colour..The word "Igneous" is a Greek word that means fire. Igneous rocks are formed by the cooling of molten rock, lava or magma. When magma solidifies in the earth they are intrusive, when lava cools outside the earth it is extrusive.
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Igneous Rocks - Rocks formed by crystallization from a melt (magma) types are: # Extrusive (volcanic) - produced when magma flows on the earth's surface # Intrusive (plutonic) - produced when magma solidifies at depth beneath the earth. eg.s are: 1)pumice. 2)Laccolith 3)Batholith 4)Dike 5)Sill
Sedimentary rock formation begins with igneous, metamorphic, or other sedimentary rocks. When these rocks are exposed at the earth's surface they begin the long slow but relentless process of becoming sedimentary rock.
There are far beyond 5 igneous rocks. Among them, there is: Pumice Obsidian Andesite Basalt Diorite Gabbro Granite Pegmatite Peridotite Rhyolite Scoria Tuff Porphyry Anorthosite Vesicular Dunite