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During the Middle Holocene, western North America was drier than present, with wetter winters and drier summers. [86] After the end of the thermal maximum of the HCO around 4,500 BP, the East Greenland Current underwent strengthening. [87] A massive megadrought occurred from 2,800 to 1,850 BP in the Great Basin. [88]
North American short-faced bear: Arctodus simus: North America Competition with the grizzly bear. [11] 8965-8875 BC [5] [24] Mexican horse: Equus conversidens: Hunting. [5] 8902-8638 BC: Damaliscus hypsodon: Kenya and Tanzania Undetermined. 8850-8750 BC [25] Flat-headed peccary: Platygonus compressus: North America
The Holocene extinction, also referred to as the Anthropocene extinction, [3] [4] is an ongoing extinction event caused by human activities during the Holocene epoch. This extinction event spans numerous families of plants [ 5 ] [ 6 ] [ 7 ] and animals, including mammals , birds, reptiles, amphibians , fish, and invertebrates , impacting both ...
A chronology of climatic events of importance for the Last Glacial Period, about the last 120,000 years The Last Glacial Period caused a much lower global sea level.. The Last Glacial Period (LGP), also known as the Last glacial cycle, occurred from the end of the Last Interglacial to the beginning of the Holocene, c. 115,000 – c. 11,700 years ago, and thus corresponds to most of the ...
End-Capitanian extinction event: 260 Ma: Volcanism from the Emeishan Traps, [28] resulting in global cooling and other effects Olson's Extinction: 270 Ma Unknown. [29] [30] [31] Possibly a change in climate, but evidence for this is weak. [32] This event may actually be a slow decline over 20 Ma. [33] Carboniferous: Carboniferous rainforest ...
Whereas the first 30 million years of the Late Cenozoic Ice Age mostly involved Antarctica, the Quaternary has seen numerous ice sheets extending over parts of Europe and North America that are currently populated and easily accessible. Early geologists therefore named apparent sequences of glacial and interglacial periods of the Quaternary Ice ...
Northwestern North America reached peak warmth first, from 11,000 to 9,000 years ago, but the Laurentide Ice Sheet still chilled eastern Canada. Northeastern North America experienced peak warming 4,000 years later. Along the Arctic Coastal Plain in Alaska, there are indications of summer temperatures 2–3 °C warmer than now. [11]
4.2-kiloyear event dry, lasted most of the 22nd century BC, linked to the end of the Old Kingdom in Egypt, and the Akkadian Empire in Mesopotamia, various archaeological cultures in Persia and China 1800–1500: Middle Bronze Age Cold Epoch, a period of unusually cold climate in the North Atlantic region Bond Event 2