Scientists reconstruct dinosaur chase 70 years after excavation

Scientists have digitally reconstructed a model of a dinosaur chase using photos of theropod and sauropod footprints excavated 70 years ago.

As one of the most famous set of dinosaur tracks in the world, the Paluxy River tracks contain both theropod and sauropod footprints.

American paleontologist Roland Bird originally excavated the extensive and well preserved footprints in 1940 in Texas, but post-excavation, paleontologists removed the tracks from their original location, divided them into blocks, and transported them to various locations around the world.

Prior to their removal, Bird documented the original site with photos and maps, but since excavation portions of the tracks have been lost. A wealth of information could be gained if we were able to view the tracks in one piece again, so researchers set about making that happen.

To digitally reconstruct the site as it was pre- excavation, scientists scanned 17 photos, developed a model and compared the model to maps drawn by Bird.

Despite the variation between the photos and the hand drawn maps, scientists were able to reconstruct and view the entire 45 m long sequence in 3D for the first time since excavation.

The 3D digital model helped the authors corroborate the maps drawn by Bird when the tracksite was first described.

The authors hope that this study will help others digitally recreate paleontological, geological, or archaeological specimens that have been lost or deteriorated over time, but for which old photographic documentation exists.

The research is published in the open access journal PLOS ONE.