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Is Rhyolite Porphyry an intrusive or extrusive rock?
Rhyolite Porphyry is an intrusive rock, formed from the slow cooling of magma underground. It is characterized by large crystals (phenocrysts) surrounded by a fine-grained matrix.
What is the mohs hardness of porphyry?
10
How fast does porphyry cool?
very slowley
Where did the large crystals form in the porphyry rock?
beneath earth's surface
What are two types of igneous rock?
Two types of igneous rock are intrusive (also called plutonic) and extrusive. There is also porphyry rock which is partly intrusive and partly extrusive. Porphyry rock has large crystals embedded in a mass of much smaller crystals. The large crystals formed underground as does intrusive rock, and were carried in lava when it erupted. The mass of smaller crystals formed around the large crystals when the lava cooled quickly above ground, as does extrusive rock.
When was Porphyry of Gaza born?
Porphyry of Gaza was born in 347.
What is a porphyry sarcophagus?
Porphyry is a type of granite that comes in various colors, that the Egyptians were known to appreciate carving things like coffins in. A stone coffin carved of porphyry is a porphyry sarcophagus.
When did Porphyry of Gaza die?
Porphyry of Gaza died on 420-02-26.
Is porphyry extrusive or intrusive?
Porphyry can be either extrusive or intrusive. Extrusive porphyry forms from lava that cools quickly on the Earth's surface, while intrusive porphyry forms from magma that cools more slowly beneath the surface. Both types of porphyry have distinctive large crystals (phenocrysts) embedded in a fine-grained matrix.
Is Rhyolite Porphyry an intrusive or extrusive rock?
Rhyolite Porphyry is an intrusive rock, formed from the slow cooling of magma underground. It is characterized by large crystals (phenocrysts) surrounded by a fine-grained matrix.
How many types of porphyry are there?
Lots
What is the mohs hardness of porphyry?
10
Is the scientific method a logical method?
Naturally. It was formed at first by Aristotle who was an excellent logician. The taxonomy is for example based on his Categories appended by the Isagoge (Introduction) of Neo-platonic philosopher Porphyry.
Is porphyry igneous sedimentary or metamorpic?
its igenoeus
How fast does porphyry cool?
very slowley
Did porphyry cool quickly or slowly?
Porphyry cooled slowly, allowing large crystals to form within a fine-grained matrix. This slow cooling process gives porphyry its characteristic appearance of large crystals embedded in a finer grained groundmass.
What minerals are found in porphyry?
Mostly feldspar and quartz
