Unformatted text preview: Leslie Evans February 9, 2005 BISC 102 TA: Louis Mammoths, saber-toothed cats, wolves and birds, such as the Grinnell’s Eagle, are all extinct mammals that lived in the Los Angeles Basin for several hundred thousand years. These and other extinct species were entrapped in the tar and preserved between 40,000 and 10,000 years ago at Rancho La Brea. This entrapment occurred when the asphalt was under conditions that made it warm and sticky, allowing everything from small insects to large mammals to become trapped. When large mammals got stuck in the tar, this often attracted other larger, carnivorous mammals that preyed on the struggling animals. Although thousands of individual animals became entrapped in the tar, this was not what led to the extinction of the mammals. This entrapment occurred during the last of the four great Ice Ages at the end of the...
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- Spring '06
- 1922, 1923, large mammals, February 9, Leslie Evans