Scientific Quarterly Journal of Geosciences

Scientific Quarterly Journal of Geosciences

The Effects of meteorite impacts on earth

Document Type : Original Research Paper

Author
Vahid Saebfar
Haraz Rah and Kavoshgaran Consulting Engineers
Abstract
The increasing progress of astronomical studies and remote sensing science has shown that the Earth has been subjected to the effects and fall of meteorites just like the other plantes of solar system and because of the impact of these celestial bodies severe and extensive changes has occurred (Like the extinction of Dinosaurs) in the evolution path of the Earth.
The geological studies which have been accomplished during the recent years in different parts of the Earth has shown that in many countries like Russia, America, Germany, Australia and Probably Iran there is traces of meteorite impact and because of these impacts small and large craters has come into existence. The fall of these celestial bodies has occurred in different geological eras and there are evidences right now that proves probably the boundary of geological eras and specially the boundary of Mesozoic and Cenozoic accords with the fall of meteorites and severe changes of climate due to this phenomenon.
Beside their ring structures, the characteristics which differentiates the impact craters from the Volcanic calderas are evidences such as the finding of unusual minerals, conical fractures of rocks and minerals, up rised rims of craters, the scatter of mysterious rocks like tektites and impactites around the craters, their location in different geological environments and etc., and with finding of one or few of these evidences around such structures their impact origin can be guessed.
Keywords
Meteorite
Subjects
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Scientific Quarterly Journal of Geosciences
Volume 4, 15-16
Spring & Summer 1995, Vol. 4,No. 15-16
Summer 1995
Pages 60-69