Held on Second Tuesday of each month at at the CCGMS Clubhouse, 516 West Atlanta Street SE, Marietta, GA 30060
7:00 PM – Start Time7:00 – 7:45 PM – Speaker or Presentation7:45 – 8:15 PM – Mini Auction, Socializing and Refreshments, Door Prize Drawings8:15 PM – Monthly Business Meeting
To get an idea of the types of programs that we typically have each month, take a look at some of the previous presentations.
The March speaker is CCGMS member and Tellus Museum Director Emeritus Jose Santamaria. We will Take a Journey through the Geological Wonders of Western Wyoming, starting with the ancient lake beds of the Green River formation in southern Wyoming, collecting 52-million-year-old fish fossils, then travelling north to the explosive geology of Yellowstone and discussions on the seismic formation of the Grand Tetons. There will to be plenty of eye candy as Jose shares plenty of photos. Born in Cuba, Jose grew up in Atlanta, where he earned a degree in Visual Arts at Georgia State University. His life-long interest in geology, minerals, and science in general led him to Tellus. Jose Santamaria served as executive director of Tellus Science Museum from 1996-2023. We’ll have refreshments and free door prizes! We hope to see you there!
Several lots are auctioned off at each regular Member Meeting, which is typically held on the second Tuesday of every month. Our auctions are another way to add to one’s collection, usually at a great price, without having to travel too far, and helps with paying for the club’s operating expenses.
On Tuesday, March 11th, the following items are up for bid.
Kudos to Auction Chair, Wayne Dodd, who selected, cleaned, and photographed each lot.
AGATE – Agates are a fibrous, banded variety of chalcedony. Agates are primarily formed as nodules within volcanic rock (when vesicles, formed from the gases trapped within magma, are filled in with silica-rich fluids slowly depositing layers working its way inwards), but they can also form in veins within sedimentary rock. The second item is a massive polished
AMETHYST – It gets its violet color when iron replaces silicone in the structure of the crystal through irradiation. Unlike other gemstones whose value is measured by weight, amethysts’ value is determined by the vibrancy of its color.
LIMONITE after PYRITE – These three specimens are from North Carolina. Limonite pseudomorphs after other minerals such as pyrite; this means that chemical weathering transforms the crystals of pyrite into limonite by hydrating the molecules (a.k.a. add water and the iron will rust), but the external shape of the pyrite crystal remains
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