Writers : Maghfouri Moghadam,Irag
Refference : Geosciences Scientific Quarterly Journal,No.:10,P.:64
Publishing Year : 1371

Abstract :

There are biological events in geological record, that within a short period of time have Caused profound effects on earth. These events embraces the sudden appearance, explosive evolution, spreading of new species and mass extinction. It seems that the causes of these phenomena have their roots in the inner activities of the earth, and or the explosions of the supernova.
This paper attempt to describe different biological events, especially mass extinctions and their causes.

Subject List : biostratigraphy