COSMOGENIC CHLORINE-36 CHRONOLOGY FOR GLACIAL DEPOSITS AT BLOODY CANYON, EASTERN SIERRA-NEVADA

被引:177
作者
PHILLIPS, FM
ZREDA, MG
SMITH, SS
ELMORE, D
KUBIK, PW
SHARMA, P
机构
[1] PURDUE UNIV,DEPT PHYS,W LAFAYETTE,IN 47907
[2] UNIV ROCHESTER,NUCL STRUCT RES LAB,ROCHESTER,NY 14627
关键词
D O I
10.1126/science.248.4962.1529
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Deposits from mountain glaciers provide an important record of Quaternary climatic fluctuations but have proved difficult to date directly. A chronology has been obtained for glacial deposits at Bloody Canyon, California, by measurement of the accumulation of chlorine-36 produced by cosmic rays in boulders exposed on moraine crests. The accumulation of chlorine-36 indicates that episodes of glaciation occurred at about 21, 24, 65, 115, 145, and 200 ka (thousand years ago). Although the timing of the glaciations correlates well with peaks of global ice volume inferred from the marine oxygen isotope record, the relative magnitudes differ markedly. The lengths of the moraines dating from 115 ka and 65 ka show that the early glacial episodes were more extensive than those during the later Wisconsin and indicate that the transition from interglacial to full glacial conditions was rapid.
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页码:1529 / 1532
页数:4
相关论文
共 31 条
[1]  
ADAMD P, 1967, QUATERNARY PALEOCOLO, P275
[2]  
[Anonymous], 1967, KOSMISCHE STRAHLUNG, DOI [DOI 10.1007/978-3-642-46079-1_7, 10.1007/978-3-642-46079-1_7]
[3]   AN ION-SELECTIVE ELECTRODE METHOD FOR DETERMINATION OF CHLORINE IN GEOLOGICAL-MATERIALS [J].
ARUSCAVAGE, PJ ;
CAMPBELL, EY .
TALANTA, 1983, 30 (10) :745-749
[4]  
ATWATER BF, 1986, GEOL SOC AM BULL, V97, P97, DOI 10.1130/0016-7606(1986)97<97:AFDFTL>2.0.CO
[5]  
2
[6]  
Bentley HW, 1986, HDB ENV ISOTOPE GE B, P427
[7]   MILANKOVITCH THEORY AND CLIMATE [J].
BERGER, A .
REVIEWS OF GEOPHYSICS, 1988, 26 (04) :624-657
[8]  
BLACKWELDER E, 1931, GEOLOGICAL SOC AM B, V42, P865
[9]   THE ROLE OF OCEAN-ATMOSPHERE REORGANIZATIONS IN GLACIAL CYCLES [J].
BROECKER, WS ;
DENTON, GH .
GEOCHIMICA ET COSMOCHIMICA ACTA, 1989, 53 (10) :2465-2501
[10]   RE-EVALUATION OF MULTI-PARAMETER RELATIVE DATING TECHNIQUES AND THEIR APPLICATION TO THE GLACIAL SEQUENCE ALONG THE EASTERN ESCARPMENT OF THE SIERRA-NEVADA, CALIFORNIA [J].
BURKE, RM ;
BIRKELAND, PW .
QUATERNARY RESEARCH, 1979, 11 (01) :21-51