Holocene glacier advances in the Topolovaya valley, Bystrinskiy Range, Kamchatka, Russia dated by tephrochronology and lichenometry

被引:24
作者
Savoskul, OS [1 ]
Zech, W [1 ]
机构
[1] UNIV BAYREUTH, INST SOIL SCI & SOIL GEOG, D-95440 BAYREUTH, GERMANY
关键词
D O I
10.2307/1552041
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Two moraine sequences in one of the ice-free cirques in Topolovaya valley located above the cirque threshold at altitudes of about 700-800 m are dated by tephrochronology and lichenometry. Prominent advances of the glaciers occurred twice prior to 7600-7700 yr BP; and at approximately 2200-2600, 1900-2300(?), and 800-1100(?) lichenometric (L) years ago. The glacier fluctuations over the Holocene were of small magnitude (length of glaciers did not exceed 1 km, equilibrium-line altitude [ELA] varied between 850 and 1100 m) as compared with those of the Last Glacial Maximum (8 km long glacier, ELA at approximately 600 m). Early Holocene advances were more extensive than Neoglacial advances. Because of the great variability of modern ELAs in Kamchatka (from 2700-2900 to 600-700 m),the reconstructed ELAs in Topolovaya valley should be considered as representative only for southern Kamchatka. A hypothesis for formation of rock glaciers from lateral moraines is considered in the paper. A new Rhizocarpon geographicum (L.) DC growth curve is established, which may be applied to dating other glacial deposits in Kamchatka.
引用
收藏
页码:143 / 155
页数:13
相关论文
共 50 条
[11]  
Braitseva O.A., 1992, QUATERN INT, V13, P177
[12]   RADIOCARBON DATING AND TEPHROCHRONOLOGY IN KAMCHATKA [J].
BRAITSEVA, OA ;
SULERZHITSKY, LD ;
LITASOVA, SN ;
MELEKESTSEV, IV ;
PONOMAREVA, VV .
RADIOCARBON, 1993, 35 (03) :463-476
[13]   Ages of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region, Russia [J].
Braitseva, OA ;
Melekestsev, IV ;
Ponomareva, VV ;
Sulerzhitsky, LD .
BULLETIN OF VOLCANOLOGY, 1995, 57 (06) :383-402
[14]  
BRAITSEVA OA, 1996, COMMUNICATION
[15]  
BRAITSEVA OA, 1991, VULCANOLOGY SEISMOLO, V11, P19
[16]  
BRAITSEVA OA, 1995, VULCANOLOGIA SEISMOL, V2, P30
[17]   A LICHENOMETRIC DATING CURVE AND ITS APPLICATION TO HOLOCENE GLACIER STUDIES IN THE CENTRAL BROOKS RANGE, ALASKA [J].
CALKIN, PE ;
ELLIS, JM .
ARCTIC AND ALPINE RESEARCH, 1980, 12 (03) :245-264
[18]  
DENTON G H, 1973, Arctic and Alpine Research, V5, P347, DOI 10.2307/1550128
[19]   7 TEPHRA ISOCHRONES IN SCOTLAND [J].
DUGMORE, AJ ;
LARSEN, G ;
NEWTON, AJ .
HOLOCENE, 1995, 5 (03) :257-266
[20]  
Egorova I. A., 1982, ENV EVOLUTION TERRIT, P220