A routine day in a limestone quarry in Oxfordshire leads to one of Britain’s most significant dinosaur discoveries in decades. Hidden beneath layers of soil, hundreds of fossilized footprints have emerged from the landscape that existed about 166 million years ago, when the area was next to a warm, shallow lagoon rather than rolling countryside. Spread over several trackways, the prints preserve the actions of one of the most famous predators of the Jurassic, as well as giant plant-eating dinosaurs. Scientists believe the site could answer long-standing questions about how these animals travel, behave and share their environment, with detailed digital records expected to support research for years to come.
How a British mine revealed a 166-million-year-old dinosaur site
The footprints at the Dewars Farm Mine came to light when mine worker Gary Johnson noticed a pattern of unusual ridges while clearing soil. According to the Oxford University Museum of Natural History, experts from the universities of Oxford and Birmingham were called in, leading to a week-long excavation involving more than 100 researchers.About 200 footprints were found on five extensive trackways from the Middle Jurassic period, about 166 million years ago. The longest uninterrupted trace extends for over 150 metres, making it the largest dinosaur footprint site ever recorded in the UK.The excavation team also took more than 20,000 photographs. It used aerial drone surveys to create detailed three-dimensional models, allowing scientists to continue studying the site long after excavations had ended.
Dinosaurs that roamed Oxfordshire 166 million years ago
Four of these trackways are thought to have been made by giant sauropods, most likely Cetiosaurus, a long-necked herbivore that grew to about 18 meters in length. The remaining trace belongs to a Megalosaurus, the carnivorous dinosaur first described by scientists in 1824 and identified by its distinctive three-toed footprints.In one part of the mine there are traces of both animals crossing each other. Although there is no evidence that they encountered each other, the overlapping paths offer an unusual snapshot of different dinosaur species roaming the same muddy ground.Speaking to NPR, Professor Kirsty Edgar of the University of Birmingham said the environment in which the animals moved was “likely lagoonal” and may have resembled “the Florida Keys today.”
How jurassic footprints help scientists understand dinosaur behavior
Bones can tell what a dinosaur looked like, but footprints preserve moments of its daily life. Scientists can estimate walking speed, direction of travel, body size and, in some cases, whether the animals moved together.According to the Natural History Museum, trackways are particularly valuable because they capture behavior that skeletal fossils cannot preserve. As paleontologist Dr. Susannah Maidment explained, “Trackways are important because they preserve fossilized behavior, something we are unable to obtain from an animal’s bones alone.”The Oxfordshire footprint survives in exceptional condition. Researchers can also watch how the soft soil slides beneath each step, the Oxford University Museum of Natural History said. Earth scientist Dr. Duncan Murdock said the preservation is so detailed that it can be seen “how the soil was deformed as dinosaurs’ feet pressed in and out”, helping scientists reconstruct the ancient lagoon environment.
Why was Oxfordshire a Jurassic dinosaur hotspot?
Modern Oxfordshire is known for agricultural land and villages, but the landscape was once part of a tropical coastline bordering the shallow sea. The muddy flats where these footprints were made were also home to other dinosaurs, early mammals, pterosaurs and marine life.This county already holds a special place in paleontology. According to the Natural History Museum, the first dinosaur formally described by science was Megalosaurus, identified from Oxfordshire fossils by geologist William Buckland in 1824. Newly uncovered trackways strengthen the evidence that both giant sauropods and large meat-eating theropods lived in the region during the Middle Jurassic.