» Home > In the News

Chinese Crater

5 March 2022

William sent in a couple of links to the same story. See for example https://weather.com/science/space/video/largest-impact-crater-in-past-100000-years-found-in-china?cm_ven=hp-slot-3 … See also  Meteoritics and Planetary Sciences 56, Nr, pages 1274-1292 at https://doi.org/10.1111/maps.13711 … the Yilan crater is 1.85 km in diameter and is located in NE China. The crater has been provisionally dated younger than 100,000 years ago. Carbon 14 dating of the charcoal and lake sediments suggest a range between 53,000 and 46,000 years ago. Interestingly, the Barringer crater in Arizona is also roughly 50,000 years old. It has a diameter of 1.2 km, so it is still a considerable size. Both dates are not too distant from the Laschamp Event, currently dated at 42,000 years ago. It is unclear if the Yilan date is derived from Bayesian methodology as the C14 method had a problem going beyond 40,000 years ago, as a result of a huge plateau in C14 at that time. While it is not necessary to link the two events one  cannot help but think a connection may exist, in some shape or form. Would a huge impact cause a reversal of the earth’s magnetic field?

Image credit: Landsat 8 (no restrictions, ref)

Skip to content