What is a porphyritic texture?

Answer 1

A porphyritic texture is displayed in an igneous rock containing large isolated crystals (phenocrysts) in a mass of fine textured 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.

See link below for a picture of a porphyritic texture in a rock.

Answer 2

Rocks develop a porphyritic texture due to magma going through a two stage cooling process. When the magma has cooled sufficiently underground, it allows some minerals to crystallize and grow in size.

Answer 3

A porphyroblastic texture occurs in a metamorphic rock when visible euhedral or near euhedral mineral crystals, such as garnet or staurolite, form and appear frequently in the the much finer grained groundmass. An example of a porphyroblastic texture would appear in a rock called garnet schist.

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Answer 4

A porphyritic rock is an igneous rock that has larger crystals embedded in a finer groundmass. The textures are common in volcanic rocks.

Answer 5

A porphyritic texture is described as a rock with a fine-grained texture with a coarse-grained texture layered behind it.

Answer 6

A porphyritic texture is commonly found in volcanic rocks. The rocks often have distinct crystals or crystalline particles embedded in a fine-grained ground mass.

Answer 7

It has a porphyritic texture, a combination of visible crystals set in a matrix of fine grained crystals.

Answer 8

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