The Philadelphia Geological Society exists to bring individuals interested in geology together.


Its more than 50 active members stay current with both local and global geology by participating in regular lectures and occasional field trips.





Next meeting: 5:00 pm Thursday, May 13, 2021.


Dr. Robert J. Stern, University of Texas, Dallas

Dr. Taras Gerya, ETH Zurich


Disruption of a Mesoproterozoic Single Lid Tectonic Regime
and Establishment of a Global Plate Tectonic Mosaic Through Neoproterozoic Time

Note new time.

Where: Your Home Office or Wherever You Connect 

How: Zoom Meeting 

To join Zoom Meeting follow this link (see instructions below), no password required: 


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Meeting ID: 853 0681 0581  

Passcode: 711798  

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You do not need to have an account with Zoom to participate in the meeting.  You may set up an account if you wish, if you donít already have one, but itís not a requirement. 

         If youíre using Zoom for the first time, click on the appropriate link above and when a window opens about running the Zoom application (an .exe file), allow your computer to do so. 

         Follow the prompts for connecting to the meeting.  They should be straightforward.  

         Disclaimer:  The PDH certificates generated by this on-line training will indicate that this presentation was made via Zoom application.We have not determined whether the State Licensing Board accepts PDHs earned via this on-line methodology. 

News & Events






PGS is now on Twitter!

Follow @PhilaGeolSoc



- Further information on membership, including an application, is available on this site.


- View a calendar of 2021 meetings, including the next scheduled lecture.


- We also offer useful links to other web sites of relevance to Pennsylvania geology.


- You can access information on the history of the Society as well.


- Learn about Philadelphia-area geology and find related resources.



PGS Officers and Contacts

Benjamin Greeley, President

727 South Warnock Street
Philadelphia, PA 19147

Joe Tomalavage, Secretary/Treasurer

1429 Shaner Drive

Pottstown, PA 19465






Webmaster: C. David Brown


Social Media: vacant


Last revised: 11 May 2021