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Which igneous rock cools the fastest glassy aphanitc pegmatic and porphyritic?
Wiki User
∙ 15y ago
Glassy igneous rocks cool the fastest. The most likely had more nucleation. Pegmatic cooled the slowest, which is why its crystals are larger than 1 cm. Phaneritic is the next slowest in cooling. Porphyritic has slow then rapid cooling, while aphanitic igneous rocks also have rapid cooling.
Wiki User
∙ 15y ago
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What igneous rock contains mostly pyroxene and olivine?
Ultramafic igneous rocks are comprised mostly of olivine and pyroxene. Examples include peridotite (pegmatic and porphyritic) and komatite.
Is porphyritic texture is not a feature of sedimentary rocks?
Porphyritic texture is a feature of some igneous rocks, not sedimentary rocks.
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
What term denotes the larger mineral grains in a porphyritic igneous rock?
phenocryst
What are Igneous rocks that have large crystals and small crystals?
Such rocks are called porphyritic.
What igneous rock contains mostly pyroxene and olivine?
Ultramafic igneous rocks are comprised mostly of olivine and pyroxene. Examples include peridotite (pegmatic and porphyritic) and komatite.
What are porphyritic rocks?
Porphyritic Rocks are rocks that have big and small crystal's like the Igneous Rock "Andesite".
Is porphyritic texture is not a feature of sedimentary rocks?
Porphyritic texture is a feature of some igneous rocks, not sedimentary rocks.
What igneous rocks are both intrusive and extrusive?
Porphyritic igneous rocks can display both intrusive and extrusive characteristics.
What term denotes the larger mineral grains in a porphyritic igneous rock?
phenocryst
What are Igneous rocks that have large crystals and small crystals?
Such rocks are called porphyritic.
Igneous rocks with a two-stage intrusive-extrusive origin are recognized by a texture which is?
porphyritic
What is the texture of an igneous rock from magma that cools in two stages?
It's texture is porphyritic
What is an example of porphyritic igneous rock?
Rhyolite porphyry. See link below for image.
The igneous rock texture characterized by two distinctly different crystal sizes is the texture?
Porphyritic
What Mineral alignment in a metamorphic rock usually gives the rock a porphyritic texture?
A porphyritic texture can be a feature of igneous rocks, but 'porphyritic' is not used to describe metamorphic rock texture. Metamorphic rocks can be foliated or non-foliated, terms used to describe mineral alignment or banding, or the lack thereof.
What is an igneous rock with both large and small crystals?
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.
