bn:00004868n
Noun Concept
Categories: Volcanic rocks, Rock stubs, Aphanitic rocks, Igneous petrology stubs, Igneous petrology
EN
aphanite  aphanitic  Aphanitic rock  aphanitic rocks
EN
Fine-grained homogeneous rock (such as basalt) containing minerals undetectable by the naked eye WordNet 3.0
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EN
Aphanites are igneous rocks that are so fine-grained that their component mineral crystals are not visible to the naked eye. Wikipedia
Certain dark igneous rocks having grain so fine that the individual crystals cannot be seen with the naked eye. Wiktionary
WordNet 3.0 & Open English WordNet
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