Pleistocene

Also known in a general sense as "the Ice Age," the Pleistocene Epoch ended between 13,000 - 9,000 years ago and is the most recent period when the Northern Hemisphere was covered in advancing and then retreating sheets of ice, otherwise known as glaciers. During the late Pleistocene Epoch, Paleoindians moved through areas of what is now known as New Mexico, although evidence of their hunting camps grow few in number once one travels west beyond the Rio Grande Basin. Most of the evidence of Paleoindian activity is in the form of stone tools and lance points.