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Pumice and scoria are both extrusive igneous rocks that form when molten rock is ejected from a volcano. In both cases gasses trapped in the magma are released, forming bubbles. Granite, by contrast, is an intrusive rock that forms when molten rock cools deep underground without erupting from a volcano. The magma is under great pressure so that gasses cannot be released. Instead they become part of the mineral structure of the newly form rock.
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Granite pumica and scoria are igneous rocks Why doesnt granite air have airholes like the other two?
it is because granite is formed by magma that cools under the earth unlike pumica and scoria that form while a volcano erupts.
How is granite different from scoria pumice and obsidian?
granite is extrusive rock
Pumice obsidian and scoria are kinds of?
These are all formed by volcanic activity. Igneous
Why doesn't granite have air holes like pumice and scoria?
Pumice and scoria are volcanic rock. They form form the lava the erupts from the volcano and contains bubbles from gasses. These bubbles cause the cavities you're calling air holes.
Is pumice in a example of a mafic igneous rock?
No. Pumice is usually intermediate or felsic. The mafic equivalent of pumice is scoria.
Is sandstone a scoria granite or pumice?
None of those. Scoria, Pumice and Granite are igneous rocks. Sandstone is sedimentary.
Granite pumica and scoria are igneous rocks Why doesnt granite air have airholes like the other two?
it is because granite is formed by magma that cools under the earth unlike pumica and scoria that form while a volcano erupts.
How is granite different from scoria pumice and obsidian?
granite is extrusive rock
What is the name of a igneous rock other than basalt and granite?
Diorite, rhyolite, pumice, and scoria.
What are some exaples of igneuos rocks?
basalt, granite, rhyolite, andesite, gabbro, obsidian, scoria, pumice.
Are there any igneous rocks?
Yes, there are many. Granite, basalt, scoria, rhyolite and pumice are some examples.
Pumice obsidian and scoria are kinds of?
These are all formed by volcanic activity. Igneous
Why doesn't granite have air holes like pumice and scoria?
Pumice and scoria are volcanic rock. They form form the lava the erupts from the volcano and contains bubbles from gasses. These bubbles cause the cavities you're calling air holes.
Examples of igneous rock?
Granite basalt pumice aplite scoria
Will scoria float or sink in water?
scoria will sink but pumice will float.
Are Scoria and Pumice pyroclastic rocks?
yes
Can pumice be red?
No. However there is a similar rock to pumice called scoria, which is sometimes red.
