Latest Paleosol Stories
Scientists have long believed that during the Jurassic, the climate of the western United States transitioned from a fairly dry New Mexico to a wetter climate in Montana. However, a new study reveals that the climate was more complex than previously thought.
A new study from University of Oregon geologist Gregory Retallack suggests that soil samples taken by NASA's Mars Curiosity rover contain evidence that Mars was once much warmer and wetter.
Geologists have long thought the loess—or fine silt—that accumulated on the Chinese Loess Plateau was carried on winds from desert regions to the northwest over the past 2.6 million years.
- A pivoted catch designed to fall into a notch on a ratchet wheel so as to allow movement in only one direction (e.g. on a windlass or in a clock mechanism), or alternatively to move the wheel in one direction.