The Maryland Geological Society is a non-profit organization dedicated to the collection, study, and display of all aspects of the geological sciences. Members include amateur and professional fossil and mineral collectors. Membership is open to all.

The club meets at the Community Center in Bowie, Maryland, on the third Sunday of every other month, beginning in January. Visitors are welcome!

Latest Club News

We are sad to report that MGS founding member Richard "Dick" Grier, Jr., died on April 10, 2019. His elder nephew Justin Grier wrote: "He passed peacefully, free of pain, he was being treated for respiratory issues." More information will be provided to the club membership when it becomes available.

The MGS largely owes its existence to Dick, Jr., and his brother Bob (who predeceased him). They, along with their father, Dick, Sr. (who died in 2017), convened a small group of fossil and mineral enthusiasts in 1991 and founded the club with Dick, Jr., as its first president and first newsletter editor. For well over two decades, he remained an active and integral member of the MGS. Dick, Jr., was awarded the club's 2nd Life Time Achievement Award in 1998 (his father received the 1st). His history of the establishment and early years of the MGS is available here. In the photo below, Dick, Jr., (at right) appears with his father. We salute them both.

Some Treasures From the Calvert Cliffs

Shown below are some Miocene fossils found along the Chesapeake Bay's Calvert Cliffs.

Next Meeting

Sunday, May 19, 2019

Joint meeting with the American Fossil Federation.

Meeting runs from 11 am to 3 pm
at the Bowie Community Center,
3209 Stonybrook Drive, Bowie, Maryland 20715

Directions to the Center can be found
under the Activities tab above
or at this link.

Speaker and Topic: Stephen Godfrey, Curator of Paleontology, Calvert Marine Museum ~
On the Making of the Model of the Cretaceous Plesiosaur Morturneria and Musings About Megalodon

Mineral of the Meeting: Taaffeite

This specimen is from Sri Lanka. This image is reproduced with permission of Rob Lavinsky under Creative Commons Attribution-Share Alike 3.0 Unported license, and is available from Wikimedia Commons.

Shows & Related Events

A list of club shows in the eastern region of the U.S. is on the EFMLS' calendar.

Selected shows and related events are listed below:

May 11, 2019 - The 30th Annual Chesapeake Gem, Mineral, & Fossil Show hosted by the Chesapeake Gem & Mineral Society will take place at the Ruhl Armory in Towson, MD. More information can be found here.


The MGS Trips page has information on policies regarding trips and details about any upcoming trips. MGS trips are restricted to members.

Tracing the Evolution from Carcharocles chubutensis to Carcharocles megalodon

A new research article traces the evolution from "Chub" to "Meg" during the Miocene Epoch at the Calvert Cliffs (MD). Victor J. Perez and his coauthors studied the presence and disappearance over time of cusplets on teeth from these ancient sharks. Full text of the article appears in the Journal of Vertebrate Paleontology.

Smithsonian Publication about the Calvert Cliffs

The Geology and Vertebrate Paleontology of the Calvert Cliffs, Maryland, edited by Stephen J. Godfrey, offers detailed descriptions and stunning pictures of vertebrate fossils from the Cliffs. A PDF copy of the book is available here.

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