Researchers at a national park in Texas have discovered countless dinosaur footprints in a dry river bed.

The extreme drought this summer brought to light the tracks filled with sediment, said the head of the authority responsible for natural parks and wildlife, Stephanie Salinas Garcia, on Tuesday (local time).

The well-preserved traces could therefore be around 113 million years old.

According to the director, most of the prints are from an acrocanthosaurus, a carnivorous theropod that could grow up to five meters tall and weigh seven tons.

Further traces come from a Sauroposeidon, which could grow up to 18 meters long with its long neck and weigh up to 44 tons.

It could be the longest consecutive tracks in the world.

Located near Dallas, the national park is nicknamed "Dinosaur Valley" because of its many dinosaur footprints.

However, his visitors will not be able to admire the footprints that have just been discovered for long, as they will soon disappear again into the water with the onset of rain.