GLACIAL PERIODS IN THE HISTORY OF THE EARTH. In the history of the Earth several times the strong temperature drop of climate led to the growth of glaciers and the formation of one or several glacial covers. This time is called or glacial periods.
In Pleistocene (epoch of the quaternary period of Cenozoic era) the area, covered with glaciers, exceeded contemporary almost triply. At this time in the mountains and in the plains of the polar and temperate latitudes arose the enormous glacial panels, which, increasing, covered enormous territories in the temperate latitudes. To represent, as the Earth in that period appeared, is possible, after looking in Antarctica or Greenland.
How they do learn about those old glacial times? Moving over the surface, glacier leaves its tracks - material, which took with itself during the motion. This material is called moraine. The stages of their standing note glaciers by the shafts of final moraine. Frequently on the name of the place, which reached the glacier, is called . Further entire glacier in the territory of East Europe it reached the valley of the Dnepr, and this is named Dneprovsk. In the territory of North America the tracks of the maximum advances of glaciers to the south relate to two ice formations: in the state of Kansas ice formation) and Illinois ice formation). Last ice formation reached the state of Wisconsin in the Wisconsin glacial epoch.The climate of the Earth strongly changed into the quaternary, or the Quaternary period, the period, which was begun of 1,8 million years ago and continuing to this day. How is caused this immense temperature drop - question, which the scientists solve.
Tens of hypotheses attempt to explain the appearance of enormous glaciers by many terrestrial and space reasons - by drop in the gigantic meteorites, by catastrophic volcanic eruptions, by changes of the direction of flows in the ocean.
In Pleistocene (epoch of the quaternary period of Cenozoic era) the area, covered with glaciers, exceeded contemporary almost triply. At this time in the mountains and in the plains of the polar and temperate latitudes arose the enormous glacial panels, which, increasing, covered enormous territories in the temperate latitudes. To represent, as the Earth in that period appeared, is possible, after looking in Antarctica or Greenland.
How they do learn about those old glacial times? Moving over the surface, glacier leaves its tracks - material, which took with itself during the motion. This material is called moraine. The stages of their standing note glaciers by the shafts of final moraine. Frequently on the name of the place, which reached the glacier, is called . Further entire glacier in the territory of East Europe it reached the valley of the Dnepr, and this is named Dneprovsk. In the territory of North America the tracks of the maximum advances of glaciers to the south relate to two ice formations: in the state of Kansas ice formation) and Illinois ice formation). Last ice formation reached the state of Wisconsin in the Wisconsin glacial epoch.The climate of the Earth strongly changed into the quaternary, or the Quaternary period, the period, which was begun of 1,8 million years ago and continuing to this day. How is caused this immense temperature drop - question, which the scientists solve.
Tens of hypotheses attempt to explain the appearance of enormous glaciers by many terrestrial and space reasons - by drop in the gigantic meteorites, by catastrophic volcanic eruptions, by changes of the direction of flows in the ocean.
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