Their study was published recently in Geology. The research team looked at the volcaniclastic rocks found in the Siberian Traps. These eruptions lasted for about two million years more. The mass extinction almost extinguished life on our planet around 252 million years in the past.Researchers ...
The fast-flowing water on the outside of the bend digs outmaterialfrom the riverbank and pushes thismaterial laterallyacrossthe bottom, and it gets deposited on the other side of the river, on theinnerside of the bend. 河湾外部最快的水流把河床的物质挖掘出来 并且推倒了河底的侧面 物质就在河...
How the Grand Canyon (大峡谷) was created remains one of the geology’s greatest mysteries. Some evidence suggests that the process was a gradual one in which the Colorado River (which runs through the canyon) slowly cut deeper and deeper into the ground over millions of years. But volcanic...
Quantitative chemical analyses of apatite grains were conducted using a JEOL JXS-8100 electron-probe micro-analyzer (EMPA) in wavelength-dispersive spectroscopy (WDS) at the institute of geology and geophysics, Chinese Academy of Science. An accelerating voltage of 15 kV and a 2.14 × 10...