Small, microscopic, hard-to-see crystals (i.e. no visible crystals) within an igneous rock. This is common in extrusive rocks.
« Back to Glossary Indexaphanitic
« Back to Glossary Index
Small, microscopic, hard-to-see crystals (i.e. no visible crystals) within an igneous rock. This is common in extrusive rocks.
« Back to Glossary Index