WebDetailed event–stratigraphical research has revealed a comparatively high platinum-group enrichment and geochemical anomalies of trace elements in the P/Tr boundary clay at Meishan, Changxing ... http://www.jsjgeology.net/K-T-boundary-clay.htm
Cretaceous–Paleogene boundary - Wikipedia
WebThe K–Pg boundary represents one of the most dramatic turnovers in the fossil record for various calcareous nanoplankton that formed the calcium deposits for which the Cretaceous is named. The turnover in this group … WebAt DSDP Hole 465A, the principal clay mineral in the boundary zone (80 to 143 centimeters) is a mixed-layer smectite-illite with ≥90 percent expandable layers, accompanied by some detrital quartz and small amounts of a euhedral authigenic zeolite (clinoptilolite). The mixed-layer smectite-illite from the interval 118 to 120 centimeters in … images of woody from toy story
Extinction of the Dinosaurs - kmf.com
WebMar 30, 2024 · What is K-T Boundary? The Cretaceous–Tertiary extinction event, now called the Cretaceous–Palaeogene extinction event. It may be called the K/T extinction event or … WebMar 9, 2001 · The K-T boundary at 65 million years ago (Ma) records a major mass-extinction event and, though the occurrence of an extraterrestrial impact ( 1, 2) is widely accepted, the nature of the impactor and its role in the K-T mass extinction is debated. WebIridium is a very rare element in the Earth's crust, but is found in anomalously high concentrations (around 100 times greater than normal) in a thin worldwide layer of clay marking the boundary between the Cretaceous and … images of woody guthrie