Geologists have come across a bewildering multitude of dinosaur footprints and tail-drag marks, of at least a 1,000 dinosaurs, on the Arizona-Utah border in the US. It is believed that 190 million years ago, the area, then in the tropics as part of the Pangaea continent, was a sandy oasis much like the Sahara Desert.
The tracks reveal that there must have been four species of dinosaurs ranging from the young to the adults that traveled all the way to the watering hole to quench their thirst. When Dr. Chan first saw these footprints in 2005, she thought that they were probably potholes created by erosion but on closer examination she noticed some prominent signs of claw, toe and heel marks.
These tracks had been hidden all these years under shifting dunes that later turned to Navajo Sandstone which then slowly eroded to reveal the fascinating footprints. But to the disappointment of Dr. Chan and all other geologists, these marvelous footprints too will slowly erode with time.
I wonder if Sarah Palin knows these interesting facts about dinosaurs … – via DailyMail