Historical Marker

Late Pleistocene Ingleside Fauna

Ingleside, San Patricio County · Texas
Erected 1984

The plaque lists the animals; the 1972 study of them by Ernest L. Lundelius Jr., for the University of Texas Bureau of Economic Geology, explains the ground. The bones lay in sands and marls of an old freshwater pond, above clay laid down in a lagoon. Live Oak Ridge and the Ingleside terrace began as a barrier island and lagoon when the sea stood higher; the pond formed later, probably scoured by wind when the sea had dropped. Large tortoises in the fauna point to mild winters, and the ages of the fossil llamas suggest seasonal rainfall.

What the plaque says

Late Pleistocene Ingleside Fauna Known today as Swan Lake, this is the site of an archeological excavation that yielded one of the largest assortments of fossils found in a single locality in Texas. They were discovered in 1939 when highway engineers were digging for caliche to use in road building. Between 1939 and 1941 the fossils of 42 prehistoric vertebrates were excavated and sorted. Fossils found here represented such animals as the mammoth, saber-toothed tiger, bison, ground sloth, camel, alligator, tapir, and various species of fresh water fish. (1984)

Where it stands

27.87105, -97.19739 · Directions

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