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Rare 95.5-Meter Sauropod Trackway Reconstructed, Reveals Subtle Gait Asymmetry

Drone imaging with millimeter-scale 3D modeling enabled a full reconstruction of the looping path, revealing patterns that short track segments can miss.

Overview

  • Researchers documented more than 130 Late Jurassic footprints at the West Gold Hill site near Ouray, Colorado, forming a complete loop roughly 95.5 meters long.
  • The dinosaur began walking toward the northeast, completed a full loop, and finished facing the same direction, offering a rare view of a tight turning maneuver.
  • Analysis detected a persistent left–right step length difference of about 10 centimeters, which the authors say may reflect a limp or a lateral side preference.
  • Footprint spacing shifted from narrow to wide along the loop, demonstrating that step width can vary naturally and that short trackway segments may mislead gait interpretations.
  • The team captured the entire site by drone and built a high-resolution 3D model for millimeter-scale measurements, with the results published in Geomatics in 2025.