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The Abbassia Pluvial was an extended wet and rainy period in the climate history of North Africa, lasting from c. 120,000 to 90,000 years ago. As such it spans the transitional period connecting the Lower and Middle Paleolithic .
The sedimentary deposits left by ancient lakes in East Africa had enabled Louis Leakey and post-war paleontologists to define major climatic periods considered wet, interspersed with drier periods.
Abbassia Pluvial wet in North Africa 108,000–8,000: Last Glacial Period, not to be confused with the Last Glacial Maximum or Late Glacial Maximum below. (The following events also fall into this period.) 48,000–28,000: Mousterian Pluvial wet in North Africa 26,500–19,000: Last Glacial Maximum, what is often meant in popular usage by "Last ...
The observatory at Abbassia was an empty monument until 1952. [8] [9] Abbassia and the nearby region saw heavy rainfall during a period of time geological researchers call the Pluvial Abbassia. During this period, red, green and purple rocks or gravel became distributed all along the valley and Delta regions of the Nile. Gravel beds were formed ...
Between about 133 and 122 thousand years ago (kya), the southern parts of the Saharan-Arabian Desert experienced the start of the Abbassia Pluvial, a wet period with increased monsoonal precipitation, around 100-200 mm/year.
The idea that changes in insolation caused by shifts in the Earth's orbital parameters are a controlling factor for the long-term variations in the strength of monsoon patterns across the globe was first suggested by Rudolf Spitaler in the late nineteenth century, [5] The hypothesis was later formally proposed and tested by the meteorologist John Kutzbach in 1981. [6]
Abbassia Pluvial; African humid period; Antarctic Cold Reversal; B. Beestonian stage; Bølling–Allerød Interstadial; Bond event; Boreal (age) C. Cambrian ...
In geomorphology, a pluvial refers to a geologic episode, change, process, deposit, or feature that is the result of the action or effects of rain. Sometimes, it also refers to the fluvial action of rainwater flowing in a stream channel, including a flood, known as a pluvial flood, that is the direct result of excessive precipitation. [1] [2]