Fossils remains of a marine reptile are being examined after being found north of Fort McMurray.

Earlier this year, fossilized remains of a plesiosaur, expected to be between 105 and 110 million years old, were found at Suncor’s Millennium mine.

The oil giant is currently working with the Royal Tyrrell Museum in Drumheller, one of the top dinosaur and marine reptile museums in the world.

An artist depiction of a plesiosaur // Suncor Energy

“Plesiosaurs were reptiles fully adapted for an aquatic life, but went extinct at the same time as the dinosaurs,” said Don Henderson, curator of dinosaurs at the museum, in a release.

This is not the first fossil found at Suncor’s Millennium mine. Back in 2011, an employee found the remains of a nodosaur which paleontologists believe is the world’s best-preserved armored dinosaur.

Meanwhile, plesiosaur remains were also recently found at Syncrude’s base plant.