The Virtual Rock Kit -

Rock 7: Metagranodiorite

This is a metamorphosed intrusive igneous rock called granodiorite (a granite-like rock).  Granodiorite is the intrusive equivalent of dacite (Rock #4).  This rock formed when hot magma cooled very slowly forming individual mineral grains that are visible with the naked eye. 

Sample with dry surface.

metagranodiorite sample

Sample with wet surface

metagranodiorite sample wet

Please remember that rock and mineral collecting is STRICTLY PROHIBITTED on protected land!

 

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Want to learn more about the geology of the Eno River area?

You may be interested in A Geologic Adventure Along the Eno River - A richly illustrated publication from the North Carolina Geological Survey.