By William James Burroughs
This booklet is thoroughly written with the entire right citations common of a tutorial textual content. i discovered the writer to be hassle-free approximately what he is aware and the way he understands it. additionally, Burroughs isn't really afraid to inform you whilst he's speculating in preference to interpretations in keeping with medical proof. in any case the ebook is a smart learn. i like to recommend it to someone drawn to the weather that early homo sapiens advanced in.
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Extra info for Climate Change in Prehistory: The End of the Reign of Chaos
25 kya. Originally discovered in northwestern Europe, this brief cold episode is clearly seen in the Greenland ice cores and in some North Atlantic marine records, and somewhat less extensively in eastern North America. When viewed on a global basis there are a number of odd features about the end of the last ice age. Around Antarctica there is little evidence of the dramatic ups and downs that marked the emergence of the northern hemisphere from the icy grip of the glacial. More striking is that the warming started two to three thousand years earlier in the southern hemisphere (Blunier & Brook, 2001).
The physical details of these techniques are not of direct concern here. What matters is that, while this plethora of measurement techniques has built up a formidable armoury of methods of dating, they often produce different answers for the same events. As a consequence, at the minimum there is some uncertainty about the precise dates of events whilst in some cases there may be considerable doubt about whether we are even talking about the same event. From now on the reader is advised to pay close attention to hints of uncertainty about the correspondence of events as it may reflect a more fundamental weakness in the analysis.
Clearly the major changes associated with the waxing and waning of the ice ages were global in nature. 7. Deep-ocean sediment core from the central North Atlantic showing the link between Heinrich events (labelled H1 to H6), which can be seen in the increase of ice-rafted debris (lithics) (white curve) and the surface water temperature as revealed in the incidence of cold-water foraminifera Neoglobigerina pachyderma (black curve). ) FIGURE The real question is, however, how the more rapid changes affected different parts of the world.