Essays about iridium clay

asteroids (1029 Words -- Approx. 4 Pages)
... After the failure of an initial attempt to measure sedimentation, Alvarez suggested that they look at the amount of iridium in the clay. ...
Asteriod And Dinosaurs (2956 Words -- Approx. 12 Pages)
... conclusion. He would later look into this aberration, and discover that the clay contained the very rare element iridium. It turns ...
The Theory of Nemesis and Reoccurring Mass Extinctions (1576 Words -- Approx. 6 Pages)
... taken and analyzed. The clay was found to have around six hundred times more iridium than the limestone surrounding it. Later on, it ...
Extinction of the dinosaurs (1100 Words -- Approx. 4 Pages)
... proposed that the dinosaurs become extinct as the result of an impact of a huge rock from space. Iridium was found in a layer of clay and marked the line ...