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Are plutonic rocks intrusive and generally consist of mineral grains that are coarse enough to be readily visible in a hand sample?
Wiki User
∙ 12y ago
Yes, They Are.
Wiki User
∙ 12y ago
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Is fluorite and intrusive rock or a extrusive rock?
selenite is a mineral
How are intrusive and extrusive rock form?
Both are formed from the crystallization of minerals caused by the cooling of magma. Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material. Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Are intrusive rocks rough and coarse?
Intrusive igneous rocks are formed from slow cooling of magma. The additional time spent in a liquid state allows for the creation of larger mineral crystals. A rock with larger mineral crystals is said to have a coarse texture.
What is a dark coarse-grained intrusive igneous rock similar to basalt in mineral make up?
Gabbro
Is mica extrusive?
No. A mineral is not inherently extrusive or intrusive. Mica can be found in intrisive igneous rocks and in metamorphic rocks.
What is an intrusive (plutonic) rock?
The mineral crystals within them are large enough to see without a microscope.
What kind of mineral has a large grains?
Intrusive
Is feldspar extrusive or intrusive?
It is actually a mineral that appears in both extrusive and intrusive igneous rocks.
Is Jasper a Intrusive rock?
Jasper a Intrusive rock is an intrusive rock which is opaque. It is a variety of silica which is impure.
Is fluorite and intrusive rock or a extrusive rock?
selenite is a mineral
How are intrusive and extrusive rock form?
Both are formed from the crystallization of minerals caused by the cooling of magma. Intrusive igneous rocks cooled below the surface of the planet, however, and generally display larger crystals due to the increased amount of time spent at mineral crystallization temperatures from the insulating effect of surrounding material. Extrusive rocks are formed from magma at or above the surface of the planet, and generally display smaller mineral crystals, or no crystals at all, because of the rapid cooling environment in which they form. Chemically, an intrusive and extrusive rock could be identical, the only difference being the size of the mineral crystals they contain.
Is peridot an intrusive or extrusive igneous rock?
Peridot is olivine, which is a mineral, not a rock. It is found in both intrusive and extrusive rocks.
Are intrusive rocks rough and coarse?
Intrusive igneous rocks are formed from slow cooling of magma. The additional time spent in a liquid state allows for the creation of larger mineral crystals. A rock with larger mineral crystals is said to have a coarse texture.
Intrusive Igneous rocks are characterized by a coarse-grained texture because they contain?
Intrusive igneous rocks commonly have large mineral crystals.
Is pumice a metamorphic rock?
No pumice is not a porphyritic igneous rock, a porphyritic rock is characterized by the presence of phenocrysts (large mineral grains) and very small mineral grains with none in between. This implies that there was two different stages of cooling. Pumice is an extrusive igneous rock that cooled very quickly.
Is the rock olivine intrusive?
Olivene is a mineral, not a rock. It can be found in both intrusive and extrusive igneous rocks. The appearance of olivene is mainly controlled by the composition of the magma
Does gabbro have crystals?
Yes. Gabbro is an intrusive igneous rock with visible mineral crystals.
