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A set of dinosaur footprints, which experts say could date back 225 million years, has been discovered in Phetchabun's Nam Nao district, according to the Department of Mineral Resources.
Staff visited the site on Saturday to examine the footprints, which were found in a dried-up creek at the Huai Hin Lat rock formation. The prints measured 10 metres wide and three metres long.
The site can be dated back to the late Triassic Period, approximately 225 million years ago.
The office's geologist said the prints became visible as the water level in the creek fell during summer. The footprints belonged to a sauropod, a group of long-necked, plant-eating dinosaurs, she said.
She said the discovery of the sauropod prints would shed some light on the evolution of ancient animals in Thailand.
The northern province of Phetchabun is known for its landscape, which once hosted dinosaurs and other ancient species. Dinosaur footprints were also found in the area in 2012.