geologic time

CSI La Brea – Tiny Traces Reveal Big Secrets of the Tar Pits

From AGI (Earth Magazine)  --  Saber-tooth tigers, dire wolves and woolly mammoths conjure up images of a past when large beasts struggled against the elements, each other, and even against humans for survival. Thousands of these creatures met their demise in the muck of the La Brea tar pits in Los Angeles, where they slowly sank into the tar and were fossilized. Now, scientists are using traces from hungry, bone-eating insects on these fossils to investigate how long it took for the giant beasts to be swallowed up by the sticky, oozy substance.

Yellowstone's Steamboat Geyser has rare eruption

Yellowstone National Park's Steamboat Geyser — the world's tallest — has erupted for the first time in more than eight years. On July 31, 2013, the nine-minute blast sent steaming hot water an estimated 200 to 300 feet in the air. Unlike the park's popular and famous Old Faithful geyser, which spews water like clockwork every hour-and-a-half, no one knows when Steamboat will erupt next. In the past, it's gone as long as 50 years without a major event. In 1964, it erupted a record 29 times. The last blast came in 2005.

Pages