LOS ANGELES: What do giant plant eating dinosaurs when he could not find enough to eat in the parched American West? Set off.
An analysis of fossil teeth adds further evidence that long-necked dinosaurs called sauropods – the largest creatures on earth – went on road trips to cover his gargantuan appetite.
Scientists have theorized that the sauropod feeding on the rich resources in times of drought because of their footprints preserved and long legs that move ideales””y machines allowed to cover long distances, said Matthew Bonnar paleobiologist at Western Illinois University .
The most recent is the best proof that at least one species of saurópodo”huyeron to the mountains in search of food when times got tough in the lowlands,”said Kristi Curry Rogers paleontologist at Macalester College in Minnesota .
The new study, published online Wednesday by the journal Nature, was led by geologist Henry Fricke, University of Colorado.
The researchers analyzed 32 teeth sauropod collected in Wyoming and Utah. The teeth came from large herbivores that roamed a semi-arid basin in the American West during the late Jurassic period about 150 million years.
Scientists can take a look at the source of drinking water the dinosaurs by comparing the oxygen retained in the enamel of the teeth found in ancient sediments.
Chemical analysis showed differences in teeth and the basin in which the dinosaurs were buried, which means you must have wandered hundreds of miles of flood plains in the highlands of food and water.
Fricke said the move appears to be linked to seasonal changes. Sauropod left of the basin in the summer of the higher elevations – a trip that took about five months – and returned in the winter.
At times lush, sauropods would have celebrated in a variety of plants, including ferns, horsetails, conifers and moss, said John Foster, a curator at the Museum of Western Colorado, who was not involved in the investigation.