4,520 BC to 4,280 BC: A mostly prehistory timeline: including: Copper Age, Sri Lanka, climate warming, Ohio River, and more.
4,500 BC to 4,000 BC: Warming Climate episode in North America.
~ Upper Egypt (predynastic) began a Copper Age state which came to an end about 3,200 BC.
~ Kame grave users north of the Ohio river of N.A. were transitioning to man-made mounds. They were also traveling the waters in dugout and birch-bark canoes, and making beads of native copper.
~ Marks what has been called the midpoint of the North America Mid-Archaic period.
~ At about this time the state of Bad-tibira was started and ended in about 2,300 BC.
~ At about this time Mari started as a copper using state and ended in 1759 BC.
~ Mid-Archaic Period in North America.
~ 2,100 BC: was the life span of the Grisi state, which began as A Copper Age State.
~ There is substantial evidence that Sri Lanka was linked to India by this time. The link was a man-made causeway.
~ Pre-dynastic Upper Egypt began a Cooper Age which came to an end about 3,000 BC.
~ Kame Grave users north of the Ohio River North America. Kame grave users were transitional to some man made burial mounds. Kame grave users were traveling the waters in dug-outs and birchbark canoes and making beads of native copper.
~ This date marks what has been called the midpoint of the North America Mid Archaic period.
~ Bad-tibiria: According to the Sumerian Kings list Bad-tibiria was the second, after Eridu before the Flood. However, archaeological evidence dates it only to this date, so far.
~ About this date Mari started as A Copper Using state and then ended in 1759 BC.
4,400 BC: The Sahara was damp enough for the hippopotami. It supported neolithic communities until it became too dry in about 3,000 BC.
~ The first evidence of a loom comes from this period in Egypt, but some simple method of holding the warp must be as old as weaving.
~ A passage grave with a superb corbelled dome is constructed on the Longue off the southern coast of Brittany.
~ Oxen are the first draught animals in use at this time in Middle East and in Europe.
~ In Mesopotamia, and the grass steppes of Southern Russia, oxen are used to pull loads on heavy sledges.`
~ New zealand: Volcanic eruption at Macauley Island in the Kermadec Islands zone. Various eruptions between about 8,300 and 6,300 years ago. Approximate ejecta volume 100km3.
4,330 BC: Historical grand solar minima.
4,300 BC: Japan: Kilkai Calder super volcano erupted in the Ryukyu islands ejecting 150 cubic km of material.
4,330 BC: Historical grand minima solar.
4,300 BC: Kilkai Calder super volcano erupted in the Ryukyu islands of Japan, ejecting 150 cubic km of material.
4,236 BC: First date in the Egyptian calendar.