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Climate, Culture, and Catastrophe in the Ancient World (1440 words) |
 | This was the beginning of the Younger Dryas, (10500 BC) a millenium in which the circulation system of the North Atlantic went into a kind of planetary fibrillation, the African monsoons migrated southward, drying the desert. |
| BP (6000-3500 BC) at which time the temperature is warming culminating in an era warmer than present, when equatorial weather patterns may have reached farther north than at present, and the westerly storms of the north would have been confined to latitudes higher than at present. |
| By 4500 BC the favorable climatic conditions and stabilized lower alluvial plains favoring territorial control and mound building (4500 BC) among native Amercan groups in the lower valleys. |
| Around the Indus in 90 Slides 2: Slide Captions (5246 words) |
| The group is standing at the edge of Trench 39 North with the remains of an early pottery kiln of the Ravi Phase, (circa 3300 BC) in the foreground. |
| 3100 BC, this hand-built pot with polychrome decoration is one of the earliest examples of intersecting circle motif in the Indus valley region. |
| 1900-1300 BC: Cemetery H in the north, Jhukar in the south and Rangpur in Gujarat. |
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