Quaternary site (Le Brea Tar Pits) near Los Angeles with very large numbers of vertebrate remains dating c 40,000-11,000BP buried in tar pits (asphalt deposits of ancient tar seeps). The tar pits contain the fossilized skulls and bones of prehistoric animals that became entrapped in the sticky seepage of the pits. The remains of such Pleistocene mammals as imperial mammoth, mastodon, saber-toothed cat, giant ground sloth, and camel have been recovered. There are some artifacts, including manos and wooden spear points.