Support Us Button Widget

Ancient fossils found in the Austin area

Austin is home to some ancient history, including gigantic aquatic lizards, prehistoric humans, and dinosaur tracks uncovered by flooding.

ATX_OnionCreekMosasaur

The Onion Creek Mosasaur rivaled the size of the terrifying T. Rex. | Photo by Larry D. Moore via OpenVerse

Larry D. Moore

Though Austin may be but 188 years old, there is tons of history to be found here.

We’ve already told you all about objects in local museums that are older than the Capital City, but we want to go deeper with fossils that were found in town, with some dating back millions of years.

The Leanderthal Lady

Discovered in 1982 at a construction site in Leander, “The Leanderthal Lady” (aka “LeAnne”) is a prehistoric female skeleton discovered by Texas Highway Department archeologists. Carbon testing revealed that she was about 30 years old, measured 5' 3", lived some 10,000-13,000 years ago, and was buried with great care.

Onion Creek Mosasaur

An enormous, 30-to-50-ft water lizard called a Mosasaur once roamed the waters (up to 600 ft deep) of Central Texas in the late Cretaceous period. Its skeleton, discovered at Onion Creek by UT geology students in 1934, had sharp teeth and a jaw that could open nearly three feet. You can see it for yourself displayed in the Texas Science & Natural History Museum.

Dinosaur tracks

As recently as 2025, dinosaur tracks were discovered in the Big Sandy Creek area after the July floods. UT Paleontologists believe the three-toed footprints found in limestone date back 115 million years ago and were likely made by an Acrocanthosaurus.

You could make the next big discovery. Find some fossils on your own at Shoal Creek, Enchanted Rock, or a hiking trail.

More from ATXtoday
Got a hot new fling? Hoping to spice things up with your longtime partner? We’re here to help plan your next date in the Capital City.
The historic Huston-Tillotson University has produced dozens of notable alumni who have shaped the Austin folks know today.
Chef-owner Amir Hajimaleki has been honing the concept through local pop-ups since 2018 with plans to showcase the Persian “art of hospitality.”
As you watch the 2026 Super Bowl, keep watch for a few familiar, local faces that will make a cameo during the commercials.
Cheer on Team USA at this year’s Winter Olympics in Milan, where four talented Texans will compete for the gold.
The annual Great Backyard Bird Count attracts more than one million people nationwide to help record the bird population.
The company will drop 350 new memberships with the opening of its second workspace, a former auto repair shop, in March.
From restaurateur duo Nick Ford and Wade McElroy, Kinsho is set to open on Rainey Street in March with an 18-seat sushi bar.
Austin’s golf scene has a handful of new additions opening this year, so it’s time to break out the clubs and hit the green.
We do things a little differently in the Lone Star State.