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Scientists Document over 16,000 Footprints in the World’s Most Extensive Dinosaur Tracksite

The Carreras Pampa site holds 16,600 three-toed and 1,378 swim tracks, providing rare insights into theropod behavior and ecology, researchers reported.

  • On Dec. 3, researchers reported nearly 18,000 dinosaur tracks at the Carreras Pampa tracksite in Torotoro National Park, Bolivia, the highest number recorded at a single site in a paper published in PLOS One.
  • The site formed along a shallow freshwater lake on the eastern flank of the Andes with carbonate-rich substrate that was soft when wet but firm when exposed, preserving deep fossil imprints intact.
  • Researchers counted 16,600 three-toed theropod footprints, 1,378 swim tracks, 1,321 trackways, 289 solitary prints, 11 track types, and footprints measuring 16 to 29 centimeters.
  • Because many marks erode rapidly, the authors warn urgent study is needed, while park rangers and guides protect Carreras Pampa from tourist damage.
  • This discovery positions Carreras Pampa as a Lagerstätte and sets global records for tracksite abundance in the Southern Hemisphere, researchers say.
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More than 16,000 tracks found at a ‘dinosaur freeway’ in Bolivia

Theropods once trekked along a “dinosaur freeway” that stretched across a shoreline in what is now Bolivia, according to a new study.

·Atlanta, United States
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Imagine a lost shoreline, crisscrossed by dinosaurs walking, running or swimming. This landscape, frozen for 66 million years, reappears today in Carreras Pampa, where a study reveals one of the largest sets of fossilized traces in the world.

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IFLScience broke the news in on Wednesday, December 3, 2025.
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