Specimen Details
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Number Of Specimens
1
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Specimen Nature
Form: Hand Specimen(s)
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Rock Name
Rhyolite Porphyry
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Rock Class
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Rock Group
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Rock Description
A specimen of a rhyolite porphyry dyke rock containing phenocrysts of quartz and feldspar and rare pieces ofthe country rock in a fine grained matrix. Previously called Granite Porphyey (dyke) and Porphyry Dyke.
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Category
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Scientific Group
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Discipline
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Collecting Areas
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Type of Item