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Because it is formed on the outside of the Earth (hense the 'ex')
This means that magma comes out of the Earth and then it cools to form pumice.
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∙ 12y ago
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Is a pumice rock a rock or a mineral?
Pumice is an extrusive igneous rock, not a mineral.
Is pumice a metamorphic rock?
No pumice is not a porphyritic igneous rock, a porphyritic rock is characterized by the presence of phenocrysts (large mineral grains) and very small mineral grains with none in between. This implies that there was two different stages of cooling. Pumice is an extrusive igneous rock that cooled very quickly.
How is granite different from scoria pumice and obsidian?
granite is extrusive rock
Name an extrusive rock with a very low density?
Pumice is an extrusive igneous rock with a density less than that of water.
What type igneous is pumice intrusive small crystal or extrusive large crystal?
It is neither. Pumice is an extrusive highly vesicular igneous rock composed of volcanic glass and very tiny mineral crystals.
Is pumice an extrusive rock?
Extrusive
Is a pumice rock a rock or a mineral?
Pumice is an extrusive igneous rock, not a mineral.
A light frothy extrusive rock?
Pumice
Is pumice a metamorphic rock?
No pumice is not a porphyritic igneous rock, a porphyritic rock is characterized by the presence of phenocrysts (large mineral grains) and very small mineral grains with none in between. This implies that there was two different stages of cooling. Pumice is an extrusive igneous rock that cooled very quickly.
Is pumice a intrusive rock?
No, pumice is an extrusive rock ejected into the atmosphere by volcanic eruptions.
Is pumice a fossil?
Pumice is not a fossil because it is not an evidence of a previously living organism. Pumice is a vesicular extrusive igneous rock.
The extrusive igneous rock that floats in water?
Pumice
Is pumice an igneous rock?
YES! It is an extrusive Igneous rock
How is granite different from scoria pumice and obsidian?
granite is extrusive rock
Which rock am igneous extrusive black?
Basalt, pumice, and obsidian are all extrusive igneous rocks which can appear as black rock.
Name an extrusive rock with a very low density?
Pumice is an extrusive igneous rock with a density less than that of water.
What type igneous is pumice intrusive small crystal or extrusive large crystal?
It is neither. Pumice is an extrusive highly vesicular igneous rock composed of volcanic glass and very tiny mineral crystals.
