This new K-T Tektites
Perhaps one of the most pleasing and you may important medical conclusions during the age are the newest 1980 advancement one to an enormous asteroid, regarding the 10 kilometers diameter, strike the earth after the new Cretaceous Several months. The newest collision put of many a great deal of debris into the environment and maybe led to brand new extinction of dinosaurs and a whole lot more existence versions. The fall out from this tremendous impression, and additionally shocked quartz and higher concentrations of your own feature iridium, is known when you look at the sedimentary stones within over 100 cities internationally on accurate stratigraphic precise location of the Cretaceous-Tertiary (K-T) border (Alvarez and Asaro 1990; Alvarez 1998). Continuer la lecture de « When the radiometric matchmaking don’t works upcoming for example perfectly consistent results manage not be you are able to »