Science Fair Project Encyclopedia
Aphanite
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An aphanite is an igneous rock with a fine-grained structure. The individual crystals are too small to see with the unaided eye.
Aphanites are commonly porphyritic, having large crystals embedded in the fine groundmass or matrix. The large inclusions are called phenocrysts.
Common Aphanites
Last updated: 08-20-2005 05:21:10
10-26-2009 08:16:03
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The contents of this article is licensed from www.wikipedia.org under the GNU Free Documentation License. Click here to see the transparent copy and copyright details


