The Maryland Geological Society, a non-profit, volunteer organization dedicated to the collection, study, and display of all aspects of the geological sciences, is composed of amateur and professional fossil and mineral collectors. Membership is open to all and visitors are always welcome!

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Latest News

September Meeting Canceled; Online Meeting Before the End of the Year

MGS President Rick Smith has released the following message for MGS members:

Dear MGS members,

We will NOT be having a meeting in September, in-person or via Zoom. The Bowie Center is no longer open on Sundays. We have tried to make alternate arrangements for a possible outdoor meeting, but were unable to secure a meeting location. We will definitely be having an online meeting before the end of the year and will let you know of details when a meeting is scheduled. I hope to have a Fall edition of The Rostrum mailed out soon.

A series of lectures that should be of interest to MGS members is being held at the Calvert Marine Museum in Solomons (Calvert County) (download flyer here). Additionally, an exhibit on sharks is now open at the museum and information is on page two of the flyer.

Rick Smith
President, Maryland Geological Society

Natural History Society of Maryland's September Raffle: Private Fossil Hunting Trip at Calvert County Beach!!

The NHSM's fund-raising raffle for September features an expert-guided private fossil hunting trip to a restricted-access beach in Calvert County. Raffle tickets are $5 each (a maximum of 1,000 will be sold). Visit the NHSM website to get more information and to purchase tickets.

No Dues For 2021

No dues will be collected for 2021. Dues paid for 2020 will be applied to a future dues payment. Individuals can join MGS in 2021 by filling out a membership application form and sending it to Treasurer Rob King WITHOUT the $15 membership dues. The application form and Rob's address can be found on the Join page.

Some Molluscan Finds From the St. Marys Formation

Pictured below are several mollusks from the St. Marys Formation (Upper Miocene).

Next Meeting

September 19, 2021. Meeting canceled. Online meeting to be held before the end of the year. More information will be forthcoming.

Mineral of the May Meeting

The mineral of the May meeting was adamite (basic zinc arsenate). It is typically yellow or greenish yellow.

(Shown above is a specimen of adamite from Durango, Mexico. 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.)

The July issue of The Rostrum features not only an article by Bob Farrar about adamite but also one on creedite (a mineral he presented at the March meeting on Zoom).

2021 Newsletter Issues Online

As part of celebrating the club's 30th anniversary this year, all of this year's issues of the MGS newsletter, The Rostrum, will be posted on the website. Issues from 2021 and those for some previous years are available on the Selected Past Issues page.


The MGS Trips page has information on policies regarding trips and details about any upcoming trips. MGS trips are restricted to members. There are no trips currently scheduled.


Want to keep up with some of the latest information on fossils and minerals appearing on the web? Then check out the MGS WebSightings page.

MGS Gallery

Pictures showing great specimens from members' collections can be seen on the MGS Gallery page.

Notable Quote

Naturalist Erasmus Darwin (Charles Darwin's grandfather):

E conchis omnia.
(Everything from shells.)
The Maryland Geological Society is a member of the Eastern Federation of Mineralogical and Lapidary Societies and the American Federation of Mineralogical Societies.

The Maryland Geological Society is NOT affiliated with the Maryland Geological Survey, a state governmental organization.
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