Tribune Full search South America becoming best stomping grounds for fossil finds Argentine paleontologist Rodolfo Coria views fossil remains of dinosaur eggs in a field in Patagonia northwest of Neuquen. Argentine paleontologist Rodolfo Coria views fossil remains of dinosaur eggs in a field in Patagonia northwest of Neuquen. The imposing tan wall of the cement quarry, just a short drive outside town, looks like the dance floor of an ancient dinosaur disco. Massive muddy prints of a titanosaur, the animal commonly known as a brontosaurus, stomp across the broad plain, at times marching side by side in pairs.
Smaller prints show the passing of an armored ankylosaur, apparently moving at a full gallop.
There's a young cousin of Tyrannosaurus rex calmly plodding along in a nearly unbroken track for a fifth of a mile, the longest set of such footprints in the world. A former muddy flood plain lifted vertical by the rise of the nearby Andes mountains, the wall is 68 million years old, dating to the final days of the dinosaurs. It is providing tantalizing clues about their diversity and number. I've been to a lot of big sites around the world, and they just keep getting bigger and better. For decades, the North American West was a mecca for dinosaur paleontologists.