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GEOL 2207 (204)
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Lecture

Cretaceous Louis and Walter and Iridium.docx

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Department
Geology
Course
GEOL 2207
Professor
J.Finnis
Semester
Summer

Description
Cretaceous Louis and Walter and Iridium THE CRETACEOUS – PALEOGENE (K/PG) EXTINCTION EVENT - Many dinosaurs went to extinction at the end of Cretaceous - 50% of all species on the planet would go into extinction - On land, animals that weigh over 25 kg would survive - Extinction most severe in oceans o 80-90% marine species extinct  Including ammonites and marine reptiles LOUIS AND WALTER ALVAREZ AND THE K/PG IMPACT - Father son team investigating a clay layer that occurs in a geological section that crosses the K/PG boundary In Italy o 1
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