This event caused persistent famines that contributed to the decline of the Old Kingdom in ancient Egypt. For 10 points each:
[10h] Name this event that marks the beginning of the Meghalayan age. This century-long event also accelerated the decline of the Liangzhu culture and the Akkadian Empire.
ANSWER: 4.2-kiloyear event [or 4.2-kiloyear BP aridification event; or 4.2 ka event]
[10e] Measurements of this quantity in Greenland notably do not support the existence of the 4.2-kiloyear event. This scientific quantity decreased markedly in the 1400s in the "Little" analog of a certain period.
ANSWER: average temperature [or T]
[10m] Droughts like the 4.2-kiloyear event led to the end of the African humid period, causing Lake Megafazzan, a lake in this modern-day country, to dry up. Later on, this modern-day country became home to a tribe centered at the city of Garama.
ANSWER: Libya [accept State of Libya] (That tribe is the Garamantes.)
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