Journal of Geology & Geophysics
Open Access

Could last cold spell 13000 years ago resulted from extraterrestrial impacts?

International Conference on Geology

June 22-23, 2015 Florida, USA

Gunther Kletetschka

Posters-Accepted Abstracts: J Geol Geosci

Abstract :

Climate has been changing in the past 20 thousand years. When ice age was ending around 15 thousand years ago, climate globally was warming up, however a transient event changed the global warming pattern and the climate changed back to cold for another thousand of years. When looking closer on details about this climate change, Younger Dryas, it became clear that this event has different character, because it was associated with large scale megamammal extinction. Also many cultures living at this time were decimated and forced to change their life style. For example wide spread Clovis culture in North America has disappeared. Cultures living in North Africa and Middle East changed their style of living from game hunters to agriculture societies. We identified globally extended layer of microspherules that is associated with this date, when climate started to change from warm back to cold. We have evidence for lack of oxygen and change in adaptation of plant material during this event.