By Linda Tancs
The world’s only actively excavated Ice Age fossil site in an urban setting is La Brea Tar Pits in Los Angeles, California. The tar pits were formed through multiple intervals of uplift and faulting, allowing crude petroleum to seep to the surface from underground reserves over the last 50,000 years, creating shallow pools that entrapped and preserved millions of fossils representing hundreds of species of plants, invertebrates and vertebrates. More than 100 excavations have been made since the early 1900s, most of which are featured in the museum on site. Check out the trails and tar pits and watch ongoing excavations.
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