WebIn climatology, the so-called "8.2-kiloyear event" was a sudden decrease in global temperatures that occurred approximately 8,200 years before the present (), that is, c. 6,251 BC.It defines the start of the Northgrippian age in the Holocene epoch. Milder than the Younger Dryas cold period before it but more severe than the Little Ice Age after it, the …

WebThe 4.2-kiloyear (thousand years) BP aridification event (long-term drought) was one of the most severe climatic events of the Holocene epoch. It defines the beginning of the current Meghalayan age in the Holocene epoch.. Starting around 2200 BC, it probably lasted the entire 22nd century BC.It has been hypothesised to have caused the collapse of the Old …

WebThe Younger Dryas (c. 12,900 to 11,700 years BP) was a return to glacial conditions which temporarily reversed the gradual climatic warming after the Last Glacial Maximum (LGM, c. 27,000 to 20,000 years BP). The Younger Dryas was the last stage of the Pleistocene epoch (c. 2,580,000 to 11,700 years BP) and it preceded the current, warmer Holocene …

WebBond events are North Atlantic ice rafting events that are tentatively linked to climate fluctuations in the Holocene.Eight such events have been identified. Bond events were previously believed to exhibit a roughly c. 1,500-year cycle, but the primary period of variability is now put at c. 1,000 years.. Gerard C. Bond of the Lamont–Doherty Earth …

WebThe Last Glacial Period (LGP), also known colloquially as the last ice age or simply ice age, occurred from the end of the Eemian to the end of the Younger Dryas, encompassing the period c. 115,000 – c. 11,700 years ago. The LGP is part of a larger sequence of glacial and interglacial periods known as the Quaternary glaciation which started around …

WebSeveral periods of abrupt climate change have been identified in the paleoclimatic record. Notable examples include: About 25 climate shifts, called Dansgaard-Oeschger cycles, which have been identified in the ice core record during the glacial period over the past 100,000 years.; The Younger Dryas event, notably its sudden end. It is the most recent …

WebInterstate Park comprises two adjacent state parks on the Minnesota–Wisconsin border, both named Interstate State Park.They straddle the Dalles of the St. Croix River, a deep basalt gorge with glacial potholes and other rock formations. The Wisconsin park is 1,330 acres (538 ha) and the Minnesota park is 298 acres (121 ha). The towns of Taylors Falls, …

WebAn ice age is a long period of reduction in the temperature of Earth's surface and atmosphere, resulting in the presence or expansion of continental and polar ice sheets and alpine glaciers.Earth's climate alternates between ice ages and greenhouse periods, during which there are no glaciers on the planet.Earth is currently in the Quaternary glaciation. …

WebThe Last Glacial Maximum (LGM), also referred to as the Late Glacial Maximum, was the most recent time during the Last Glacial Period that ice sheets were at their greatest extent. Ice sheets covered much of Northern North America, Northern Europe, and Asia and profoundly affected Earth's climate by causing drought, desertification, and a large drop …

WebThe Sahara pump theory is a hypothesis that explains how flora and fauna migrated between Eurasia and Africa via a land bridge in the Levant region. It posits that extended periods of abundant rainfall lasting many thousands of years (pluvial periods) in Africa are associated with a "wet-green Sahara" phase, during which larger lakes and more rivers …