Various theories have been put forward for the mass-extinction virtually 65 million years ago at the end of the cretaceous period that caused the extinction of the dinosaurs: These range from disease to tropical cyclones and look for alien abductions have been suggested. However the nigh popular workable action is that a giant meteor struck the Earth. This came about from snap and from a high level of the rare come atomic number 77 found at the limit point between Cretaceous and third rocks 65 million years old: this is likely to be caused by either of twain things: from cosmic matter, i.e. a meteorite, or from the mantle inside the Earth, i.e. from volcanoes. The most popular theory remain the Meteor theory. The main importation here is not the wedge of the meteor (it is hypothesised that a crater which is in Northern azimuth is the crater of this meteor and it is in like manner thought that an explosion from the Tunguska River in Syberia coul d be responsible, although it looks doubtful in my opinion. It is also hypothesised that the crater is today on the sea bed, which is reliablely possible) notwithstanding the clouds of dust which it threw up into the atmosphere.
This dust caused an super sudden change in the temper of the atmosphere: this make it difficult to breathe to a certain extent but the main problem associated was that the dust obscured the sunniness blocking sunlight from reaching the Earth causing trace and a angle of dip in temperature. In the sea the deficiency of light caused booby hatch for the photosynthesising nannoplankton algae. Collapse of the oceans algae communi! ties meant troubles for the zooplankton which fed of them and whence all the another(prenominal) animals that fed on them. There was also a accrue in Oxygen levels and strong up-currents. This guide to... If you want to accomplish a full essay, order it on our website:
OrderCustomPaper.comIf you want to get a full essay, visit our page:
write my paper
No comments:
Post a Comment