Photos descriptions and facts about intrusive and extrusive igneous rocks.
Picture granite igneous rock.
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Adakite a class of intermediate to felsic volcanic rocks containing low amounts of yttrium and ytterbium.
Aplite a fine grained intrusive igneous rock.
Diorite is a coarse grained igneous rock that forms when the magma did not erupt but instead slowly crystallized within earth s crust.
Anorthosite a mafic intrusive igneous rock composed predominantly of plagioclase.
Examples of intrusive igneous rocks are diabase diorite gabbro granite pegmatite and peridotite.
Igneous rocks are formed from the solidification of molten rock material.
Granite is used by the public as a catchall name for any light colored coarse grained igneous rock.
Andesite an intermediate volcanic rock.
This is also called a plutonic rock.
Alkali feldspar granite a granitoid in which at least 90 of the total feldspar is alkali feldspar.
Granite ˈ ɡ r æ n ɪ t is a common type of felsic intrusive igneous rock that is granular and phaneritic in texture.
Granites can be predominantly white pink or gray in color depending on their mineralogy the word granite comes from the latin granum a grain in reference to the coarse grained structure of such a completely crystalline rock.
Granite is a type of igneous rock that consists of quartz gray plagioclase feldspar white and alkali feldspar beige plus dark minerals such as biotite and hornblende.
Andesite is a fine grained rock that formed when the magma erupted onto the surface and crystallized quickly.
Granite is composed mainly of quartz and feldspar with minor amounts of mica amphiboles and other minerals this mineral composition usually gives granite a red pink gray or white color with dark mineral.
There are two basic types.
Intrusive igneous rocks crystallize below earth s surface and the slow cooling that occurs there allows large crystals to form.
Uses of granite the rock used everywhere from the kitchen to the facing stone of skyscrapers.
What are igneous rocks.
Granite is a light colored igneous rock with grains large enough to be visible with the unaided eye.
It forms from the slow crystallization of magma below earth s surface.