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The beach ridges at Santa, Peru: El Niño, uplift, and prehistory
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The beach ridges at Santa, Peru: El Niño, uplift, and prehistory
作者:
Daniel H. Sandweiss,
期刊:
Geoarchaeology
(WILEY Available online 1986)
卷期:
Volume 1,
issue 1
页码: 17-28
ISSN:0883-6353
年代: 1986
DOI:10.1002/gea.3340010103
出版商: John Wiley&Sons, Inc.
数据来源: WILEY
摘要:
AbstractRecent work on the beach ridges at Santa, Peru (9° s latitude) upholds an earlier hypothesis, based on sedimentary evidence, that the ridges were formed by massive sediment pulses during rains associated with major incursions of the warm water El Niño countercurrent. The ridges can therefore be used to date major El Niño events. The alternate hypothesis for the Santa ridge origin cited minor sequential uplift as the causal factor; this hypothesis has been disproven, though one previously unreported uplift event at about 4200 years B.P. has been identified at Santa. In general, landscape alteration processes such as El Niño floods and tectonic uplift affect human populations, and accurate chronologies of these events are necessary to interpret the archaeological record. Geoarchaeological research offers the key to constructing landscape alteration chronologies, which are also of use to geologists for studies of earthquake prediction, sedimentation processes, and paleoclimatol
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