websterite
Sign in to savethumb|Websterite highlighted in a ternary diagram thumb|Cumulate rock|Cumulate layers of websterite in the [[McMurdo Dry Valleys in Antarctica]]
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thumb|Websterite highlighted in a ternary diagram thumb|Cumulate rock|Cumulate layers of websterite in the [[McMurdo Dry Valleys in Antarctica]]
Websterite is ultramafic igneous rock, a type of pyroxenite that has less than 5% olivine and roughly equal proportions of orthopyroxene and clinopyroxene.
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pyroxene
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porphyry
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quartz monzonite
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tachylite
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North Carolina
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International Standard Book Number
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mineral
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coal
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granite
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marble
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limestone
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igneous rock
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flint
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basalt
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sedimentary rock
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sandstone
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chalk
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metamorphic rock
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obsidian
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lapis lazuli
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