The clay preservation forms a 3D template or mask of the carcass, created as sediment and biofilm interact after a flash flood, leaving a thin clay film instead of organic tissues.
CT-based imaging confirms the presence of horse-like hooves and a duck-billed snout in Edmontosaurus annectens, marking firsts in land-vertebrate locomotion and posture for such fossils.
The study integrates multi-modal imaging (micro-CT, X-ray spectroscopy) to reconstruct skin, crest, spikes, and thin scale textures on the mummified specimens.