A MAZAMA TEPHRA MARKER BED IN THE FRASER LOWLAND, BRITISH-COLUMBIA

被引：2

作者：

WILLIAMS, HFL ^{[1
]}

DAURIA, J ^{[1
]}

机构：

[1] SIMON FRASER UNIV, DEPT CHEM, BURNABY V5A 1S6, BC, CANADA

来源：

CANADIAN JOURNAL OF EARTH SCIENCES | 1991年 / 28卷 / 01期

关键词：

D O I：

10.1139/e91-014

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Drill cores from the Fraser River delta and western Fraser River floodplain, British Columbia, reveal a widespread tephra marker bed within silty floodplain deposits. Isolated tephra layers have been noted in previous studies in the Fraser Lowland and have been assumed to be Mazama tephra (ca. 6800 BP). This note presents the results of the first attempt to systematically identify a number of tephra samples from this area, based on X-ray energy spectroscopic analysis of their chemical compositions and bracketing radiocarbon ages. The results confirm that the tephra bed is Mazama, a finding of considerable utility to future studies in this area.

引用

页码：150 / 153

页数：4

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