This new K-T Tektites

One of the most fascinating and crucial medical findings during the decades are the fresh 1980 development you to definitely a big asteroid, throughout the 10 miles diameter, struck the earth at the end of new Cretaceous Months. The fresh accident threw of numerous a great deal of dirt towards the ambiance and maybe triggered the new extinction of the dinosaurs and many other lifetime variations. The newest fall out using this immense impact, together with surprised quartz and you will high levels of the feature iridium, has been found from inside the sedimentary stones in the over 100 urban centers global in the appropriate stratigraphic location of the Cretaceous-Tertiary (K-T) edge (Alvarez and you will Asaro 1990; Alvarez 1998). Diesen Beitrag weiterlesen »