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What is a porphyritic texture?
Answer:
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.
Related answers: - How do you determine the age of a porphyritic texture? You cannot determine the age of a "texture". There are numerous methods for dating the age of...
- Describe a porphyritic texture? A porphyritic texture is described as a rock with a fine-grained texture with a coarse-grained...
- How does porphyritic texture look like? There are 2 or more very distinct gain sizes. The smaller grains are called phenocrysts and the...
- Is porphyritic texture is not a feature of sedimentary rocks? Porphyritic texture is a feature of some igneous rocks, not sedimentary rocks.
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