NACIMIENTO DE UNA SUPERNOVA, TRANSICIÓN GAUSS-MATUYAMA Y LÍMITE PLIO-PLEISTOCENO

SINITO, A.M.; COMPAGNUCCI, R.H.; - ORGEIRA, M.J.

Congreso; Latinmag meeting, Juriquilla, Qro, Mexico; 2017

Latinmag

This contribution considers that there is an increase of Galactic Cosmic Rays (GCR) in space due to the birth of a supernova near our solar system. This event would have started around 2.8 to 2.6 Ma and finished between 1.7 and 1.5 Ma with a peak around 2.2 Ma; a consequent increase of radiation input to Earth took place. This increase is favored by the weakening and even suspension of the Earth?s magnetic field during the reversion between the Gauss and Matuyama Chrones. Allthese factors generated a relative maximum of the GCR flux on the earth, which could act as trigger of the beginning of the first Quaternary glaciation and the appearance of the oscillations between warm and cold stages that characterized the Pleistocene.