Im having trouble dissecting your linking of the PETM and K/Ar. Why are you doing this?
1I think you would spend some time in documenting your sources because several of your statements are actual lifts from the literature.
2Maybe youre way ahead of me here but I need to see some brief statement of your purpose (OVERALL purpose).
I dont mean to be technically critical but you need to make sure your intended readers are "on board" with some sort of abstract that summarizes the purpose and the findings and references to your sources as well.
Your syntax sounds a bit too ESL, is your language of study English?