Is porphyritic rock extrusive or intrusive? - Answers
2024年6月16日 · A porphyry is a type of igneous rock derived from a two stage cooling process. yes it is an igneous rock. Porphyry is an igneous rock. i think it is extrusive. A porphyritic igneous rock is one ...
This igneous texture is characterized by two distinctively ... - Answers
2024年6月11日 · The igneous texture characterized by two distinctively different crystal sizes is known as porphyritic texture. Porphyritic rocks have larger crystals (phenocrysts) surrounded by a fine-grained ...
How do porphyritic rocks form? - Answers
2024年6月16日 · Porphyritic rocks form when magma slowly cools beneath the Earth's surface, allowing large crystals (phenocrysts) to grow within a fine-grained matrix. The phenocrysts are surrounded by a finer ...
What is an igneous rock with both large and small crystals
2024年6月12日 · 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 ...
What are the crystal structures in porphyritic rocks? - Answers
2024年6月12日 · Porphyritic rocks typically have a porphyritic texture, where large crystals (phenocrysts) are embedded in a finer-grained matrix (groundmass). The crystal structures within porphyritic rocks can ...
What is an example of porphyritic texture? - Answers
What is an example of porphyritic texture? Updated: 6/19/2024. Wiki User. ∙ 13y ago. Study now. See answers (3) Best Answer. Copy. There are 2 or more very distinct grain sizes.
What is the texture of adakite? - Answers
2024年6月14日 · Typically porphyritic with hbl phenocrysts. Tags Science Subjects. Animals ... Adakite is a type of volcanic rock with a fine-grained to porphyritic texture. It typically has a glassy groundmass ...
Is porphyritic texture is not a feature of sedimentary rocks
Porphyritic texture is a feature of some igneous rocks, not sedimentary rocks. Wiki User. ∙ 14y ago. This answer is:
Igneous feature would you find rocks with a vesicular texture?
2024年6月17日 · Correct, porphyritic texture is typically associated with igneous rocks and is not a common feature of sedimentary rocks. It is characterized by larger crystals, known as phenocrysts, surrounded ...
What are the possible textures of an igneous rock? - Answers
2024年6月19日 · Porphyritic texture is shown in igneous rocks that have two distinct crystals. Aphanetic, or fine-grained, texture means that the rock has crystals that are too small to see without a lens (<1mm).