Olivine Gabbro (1830)
Item
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Title
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Olivine Gabbro (1830)
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Description
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Macro: Hand specimen is medium-grained dark gray rock, over 90% of the rock is made up of about equal amounts of plagioclase and pyroxenes, with the rest made up small olivine grains and possibly magnetite.
Micro: Thin section show large amounts of well twinned plagioclase. Augite/diopside also common showing good cleavage, but they are largely anhedral. Small olivine grains within pyroxenes.
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Creator
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Dustin Morris
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Source
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Ward's collection
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Publisher
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Lafayette College
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Contributor
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Tamara Carley
