期刊
JOURNAL OF QUATERNARY SCIENCE
卷 29, 期 8, 页码 789-802出版社
WILEY
DOI: 10.1002/jqs.2752
关键词
Burney spring Mountain; cluster analysis; geochemistry; redeposition; tephra correlation
资金
- NSF CMMI grant [1131074]
- AFOSR [FA9550-11-1-0336]
- Div Of Civil, Mechanical, & Manufact Inn
- Directorate For Engineering [1131074] Funding Source: National Science Foundation
Two discontinuous tephra layers were discovered at Burney Spring Mountain, northern California. Stratigraphic relationships suggest that they are two distinct primary fall tephras. The geochemistries of these tephras from electron probe microanalysis were compared with those of known layers found in the area to test for potential correlations, using clustering analysis on geochemistry. In most cases, geochemical data from a tephra layer can be assigned to a single cluster, but in some cases the analyses are spread over several clusters. This spreading is a direct result of mixing and reworking of several tephra layers. The mixing, in turn, appears to be related to the influence of wind in a marshy environment.
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