Earn money through your website, join Affiliate Window

Monday, February 20, 2006

K, T & Q

K, T and Q stand for Cretaceous, Tertiary and Quaternary, respectively.

The terms are among those used in geology to name a "system period" in "geological time". The Cretaceous period lasted for 70 million years in term of absolute dating, from 135 million years ago (135 Ma) to 65 Ma. The Tertiary period commenced at 65 Ma and ended at 1.75 Ma, whereas the Quaternary period is from 1.75 Ma until Present.

No comments: