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RafaLava is extrusive, meaning it forms on the Earth's surface as a result of volcanic activity. It cools rapidly and solidifies quickly into volcanic rock, such as basalt or obsidian. Intrusive rock, on the other hand, forms below the Earth's surface from magma that cools slowly.
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Is peridot an intrusive or extrusive igneous rock?
Peridot is an extrusive igneous rock, meaning it was formed from lava that cooled and solidified at the Earth's surface.
Is Basalt intrusive or extrusive?
Basalt is an extrusive igneous rock, meaning it forms from volcanic eruptions and cools rapidly at the Earth's surface.
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 pumice an extrusive or an intrusive rock?
Pumice is Extrusive after it has been envelop from the volcanoes eruption! it can somehow be a intrusive but very "rare". It is however very light and bumpy felling!
Why are the names intrusive and extrusive appropriate for the two types of igneous rocks?
The names intrusive and extrusive are appropriate because they describe where the rocks form. Intrusive rocks form inside the Earth's crust from magma that cools slowly, resulting in a coarse texture. Extrusive rocks form on the Earth's surface from lava that cools quickly, resulting in a fine texture.
