K-T boundary
Where does the letter K come from in K-T boundary?
The abbreviation for the German form of the word Cretaceous
How long ago was the Cretaceous era?
65 million years ago
Who sized the crater?
Luis Alvarez
What is shown in abundance in the K-T boundary?
Iridium metal
Which period were Foram's larger?
Cretaceous period
How was the age of the Chicxulub crater tested?
Obtaining samples from wells drilled by PEMEX(mexican oil company)
What led to realizing the K-T boundary existed? Why?
Foram's- seeing the difference in sizes was puzzling due to the fact there was no gradual change
What 3 eras make up the geological time periods?
Paleozoic, Mesozoic, and Cenozoic
Who measured the iridium from the K-T boundary?
Nuclear chemist Frank Asaro