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  • WIPS Invitation to DPS

WIPS Invitation to DPS

  • Mon, February 01, 2021
  • 8:00 PM - 10:00 PM
  • ZOOM

For all members of DPS

Please join us via Zoom on Monday, February 1 at 8 PM Central Standard Time for a presentation by John McLeod for the Western Interior Paleontological Society (WIPS)

When Reefs and Rivers Collide: An Unusual Fossil Biota from the Pennsylvanian Of North Texas

Intermittent outcrops around Lake Bridgeport in north Texas can afford exceptional collecting of a diverse and well preserved fossil biota.  From 2011 until mid-2015, the dam-impounded lake dropped to record-low water levels due to a combination of extended drought and growing consumption demand by the city of Fort Worth.  During this four-year window, extensive exposure of long-submergent formations afforded detailed study of the geology and fossil content of formerly inaccessible localities. Owing to its unique paleogeographic setting and favorable conditions for preservation, the assemblage is unusual in containing a diverse mixture of terrestrial and marine environments, plants, large invertebrates, vertebrates, trace fossils, sedimentary structures and even pseudofossils.

The greater Pennsylvanian seaway of the Lake Bridgeport area was closed to the north by the emergent Wichita Mountains in southern Oklahoma and received additional sandy sediment from the Perrin river and delta that originated from the rising Ouachita Mountains to the southeast.  Although much of the shallow muddy bottom around the deltas was well-oxygenated, at least two thin intervals of less-oxic sediments preserve nodules containing an unusual fauna.  A sea level rise eventually drowned the muddy substrate and deltas with algal limestone but some of the predecessor benthic and pelagic species survived and even prospered in and around the new environment.  A massive accumulation of fossils and associated sedimentary structures from Lake Bridgeport outcrops collected over a 30-year period has yielded a number of new or unique specimens

Virtual Meeting using Zoom

An invitation link to join the next meeting is in the box below. You can also find the link in the Member Login & Renewals area on the WIPS website. To join the meeting, click the link provided below. You may need to download the free desktop application, or you can use the free web browser application. If you have questions about how to join the meeting, contact Nancy Kimber.

WIPS Meeting –
February 1 2021
8 PM

Join Zoom Meeting

Meeting ID: 880 0781 9828
Passcode: 134227
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Meeting ID: 880 0781 9828
Passcode: 134227
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Who we are

The DPS is a group of professional and amateur paleontologists that want to exchange information, interact, and continue their education in paleontology.  We meet once a month on the second Wednesday evening of the month at Brookhaven College, Building H.


If you have a question, if you have a fossil that you cannot identify, or need a site investigation, contact the Fossil Bureau of Investigation for help.

Contact Us at 817-355-4693 

Why join us

We have fun.

We learn stuff.

We go cool places.

We find interesting things.

We make new friends.

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