'Mother Lode' of Amazingly Preserved Fossils Discovered in Canada
A treasure trove of fossils chiseled out of a canyon in Canada's Kootenay National Park rivals the famous Burgess Shale, the best record of early life on Earth, scientists say.
"Once we started to break fresh rock, we realized we had discovered something incredibly special," said Robert Gaines, a geologist at Pomona College in Pomona, Calif., and co-author of a new study announcing the find. "It was an extraordinary moment."
The Burgess Shale refers to both a fossil find and a 505-million-year-old rock formation made of mud and clay. The renowned Burgess Shale fossil quarry, a UNESCO World Heritage site located in Yoho National Park, is in a glacier-carved cliff in the Canadian Rockies. The fossils were discovered in 1909. Since then, several other fossil sites have been found in the Burgess Shale, but none as rich as the original.
The fossils are extraordinary because they preserve soft parts of ancient animals in exceptional detail; these soft parts are less likely to be imprinted in stone than harder parts, like bones. More than 200 animal species have been identified at the 1909 fossil site, providing a rare window into the Cambrian explosion, the time when complex body forms first appeared in Earth's fossil record starting about 542 million years ago.
http://www.livescience.com/43270-new-burgess-shale-fossils-canada.html
