Artist's concept of the Javelina Formation in Texas. Pictured are Bravoceratops, a few troodons and a small herd of Alamosaurus. - Photos

Artist's concept of the Javelina Formation in Texas. Pictured are Bravoceratops, a few troodons and a small herd of Alamosaurus. This is a depiction of some of the fauna of the Javelina Formation in western Texas near Big Bend National Park. Age estimates for this formation are 69-66 million years ago. A large ceratopsian, Bravoceratops is being spied upon by T-rex near some trees. A few Troodons come up the water's edge in the lower left and in the background a small herd of Alamosaurus make their way to the river. An Azdarchid flies above. Quetalcoatlus most likely.