A Special GMS Group
for People Interested in Minerals
Mineral Section Meets
Minerals are as varied and unique as people. From the mundane to the spectacular, minerals are fascinating in many respects.
GMS members and visitors who are interested in learning more about minerals -- please join us at Mineral Section meetings for special programs and presentations!
Click here for articles about minerals.
If you have any questions about Mineral Section, please send email to
Mineral Section Message
Decomposed Granite [Public domain] via Wikimedia Commons
Date: Wednesday, March 20, 2019
Time: 7:30 pm
Topic: Georgia Granite Part 2
Location: GMS Building
The February meeting discussed the mineralogy of granite and its formation. We discussed the origin and growth of the continental cratons and how that led to different ages and kinds of granite in Georgia. The fractional differentiation of granite as it cools makes it different from other igneous rocks and produces many of the variations. We examined different samples of granite and the metamorphic effects of eastern North America’s tectonic history on Georgia granites.
This month, we will discuss how weathering changes and removes minerals from granite and provides many of the sedimentary rocks that make up the landforms of Georgia.
Mineral Section Chair
Click below for a map and directions