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The Quaternary glaciation, also known as the Pleistocene glaciation, is an alternating series of glacial and interglacial periods during the Quaternary period that began 2.58 Ma (million years ago) and is ongoing.
A minor series of glaciations occurred from 460 to 430 Ma, and there were extensive glaciations from 350 to 289 Ma. The Late Cenozoic Ice Age has seen extensive ice sheets in Antarctica for the last 34 Ma. During the last 3 Ma, ice sheets have also developed on the northern hemisphere.
Most of the world's large animals became extinct during the Late Pleistocene as part of the Late Pleistocene extinctions, a trend that continued into the Holocene. In palaeoanthropology , the late Pleistocene contains the Upper Palaeolithic stage of human development, including the early human migrations of modern humans outside of Africa, and ...
Four of the glaciations (MIS 22, MIS 20, MIS 18, MIS 14) were moderate, probably involving low-land glaciation in Scandinavia, but not spreading to England and northern Germany. [1] One of the glaciations, Marine Isotope Stage 16 (MIS 16), is globally as strong as the most recent glaciations, MIS 6 (main Saale ) and MIS 2 ( Weichsel/Devensian ).
The Mid-Pleistocene Transition (MPT), also known as the Mid-Pleistocene Revolution (MPR), [1] is a fundamental change in the behaviour of glacial cycles during the Quaternary glaciations. [2] [3] The transition lasted around 550,000 years, [4] from 1.25 million years ago until 0.7 million years ago approximately, in the Pleistocene epoch. [5]
The Quaternary Period follows the Neogene Period and extends to the present. The Quaternary covers the time span of glaciations classified as the Pleistocene, and includes the present interglacial time-period, the Holocene. This places the start of the Quaternary at the onset of Northern Hemisphere glaciation approximately 2.6 million years ago .
The Bull Lake glaciation is the name of a glacial period in North America that is part of the Quaternary Ice Age.The Bull Lake glaciation began about 200,000 years ago and ended about 130,000 years ago, and was concurrent with the Illinoian Stage of the Quaternary Ice Age. [1]
The event may have been caused by a large meltwater pulse, [10] which probably resulted from the final collapse of the Laurentide Ice Sheet of northeastern North America, [11] [12] [13] most likely when the glacial lakes Ojibway and Agassiz suddenly drained into the North Atlantic Ocean. [14]