Modern tidal rhythmites deposited in a deep-water estuary

被引：55

作者：

Cowan, EA ^{[1
]}

Cai, J

Powell, RD

Seramur, KC

Spurgeon, VL

机构：

[1] Appalachian State Univ, Dept Geol, Boone, NC 28608 USA

[2] No Illinois Univ, Dept Geol, De Kalb, IL 60115 USA

来源：

GEO-MARINE LETTERS | 1998年 / 18卷 / 01期

关键词：

D O I：

10.1007/s003670050050

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

The sedimentary record in Muir Inlet, a macrotidal fjord in Alaska, is dominated by cyclic silt-mud rhythmites. Couplet thicknesses vary systematically in a vertical sequence and reflect a semidiurnal tidal regime. Semimonthly, monthly, bimonthly, and annual cycles can be identified both visually in cores and by spectral frequency analysis. An average annual sedimentation of 22.5 cm yr(-1) occurs over a four-month meltwater season and is confirmed by Pb-210 dating. These modern deepwater tidal rhythmites can be used to verify interpretations made on ancient rhythmites in the stratigraphic record, and they also provide a dating tool to interpret high latitude successions for high-resolution climate change.

引用

页码：40 / 48

页数：9

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