Granodiorite main content.

Granodiorite

Granodiorite AMNH/R.Mickens

Exhibition Text

The upper crust is made of low-density granitic rocks. This one is composed of gray quartz, white feldspar, brown flakes of mica, and black needles of hornblende.

Donated by New England Stone Industries, Inc., Esmond, Rhode Island

For Educators

Topic: Earth Science

Subtopic: Minerals and Resources

Keywords: Granodiorite, Geology, Earth (Planet)--Crust, Minerals

Audience: General