Difference between revisions of "Cryptocrystalline"
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a term for glassy rocks which break with a conchoidal fracture, such as obsidian. | a term for glassy rocks which break with a conchoidal fracture, such as obsidian. | ||
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[[Category: Anthropology]] | [[Category: Anthropology]] | ||
Revision as of 09:39, 5 September 2019
a term for glassy rocks which break with a conchoidal fracture, such as obsidian.
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