Rhyolite porphyry. See link below for image.
It's texture is porphyritic
Porphyritic
Granite rock is not porphyritic. It is phaneritic because it has a coarse-grained texture.
No. I believe they are called chemical precipitate sedimentary rocks. Yes, I'm sure they're called that. Absolutely! Porphyritic is a term usually applied to igneous rocks, having to do with mineral formation and rock texture.
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Porphyritic Rocks are rocks that have big and small crystal's like the Igneous Rock "Andesite".
It's texture is porphyritic
Phenocrysts are the larger mineral grains in a porphyritic igneous rock. These crystals are surrounded by a finer-grained matrix known as the groundmass. The presence of phenocrysts helps in understanding the cooling history of the rock.
Porphyritic
The type of igneous rock that has large crystals surrounded by smaller crystals is not a rock but a porphyritic texture. This texture describes igneous rock that has porphyrites, or large crystals, with surrounding tiny particles, or groundmass.
Yes, granite is an example of an igneous rock.
A porphyritic igneous rock is one with a texture containing large isolated crystals (phenocrysts) in a mass of fine grained crystals . Porphyritic texture indicates that a magma has gone through a two stage cooling process. The magma has cooled sufficiently underground to allow some minerals to crystallize and grow in size; the magma is then expelled above ground where the remaining liquid magma solidifies quickly, allowing only small crystals to develop.
An intrusive igneous rock.
It is an example of extrusive igneous rock.
Pegmatite is a type of igneous rock that can have two different grain sizes of the same mineral present. This is due to the slow cooling process of the magma, allowing for the growth of large crystals (phenocrysts) within a finer-grained matrix.
Granite rock is not porphyritic. It is phaneritic because it has a coarse-grained texture.
Igneous means that it usually comes from a volcano. For example, igneous rock is rock from a volcano