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Pinal Geology and Mineral Museum

The Only Science Museum in Pinal County, Arizona

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Pinal Geology and Mineral Museum

The Only Science Museum in Pinal County, Arizona

Home
PGMS/M Newsletter
Our Blog
Museum Exhibits
Kid Zone for all ages
Museum Calendar
Pinal Geology and Mineral Society
For Teachers and Parents
Sitemap
Contact Us/Museum Location
- Society & Museum Contact Form

Phenocryst

by Pinal Geology Museum
July 29, 2023July 29, 2023

Large crystals in an igneous rock that are surrounded by a finer-grained matrix.

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