Rock Name

Basalt Porphyry

Creator

Preview

image preview

Color

Black with white, pink crystals

Setting

Extrusive

Texture

bi-modal

Comments

A fine crystal size groundmass (basalt) surrounding coarse crystals indicates two phases of cooling, an initial slow phase, followed by a faster, extrusive formation of the basalt.

Permission Statement

This image may only be used for noncommercial educational and scholarly purposes. Please contact the Department of Geology at the University of Dayton to inquire about permission to use a specific digital resource.

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