The Aphanite reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Aphanite

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 porphyrites, having large crystals embedded in the fine groundmass. The large inclusions are called phenocrysts.

Common Aphanites

• Andesite
• Basalt
• Basanite
• Dacite
• Leucitophyre
• Phonolite
• Rhyolite
• Trachyte

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