Loess deposits In Lower Adventdalen, Spitsbergen

[摘要] Aeolian deposits are described in terms of their areal distribution, sedimentary and pedological characteristics. These deposits, which have accumulated at the valley margins, result from deflation of fluvian sediments deposited in the valley bottom. Fine horizontal lamination in the upper horizons is tentatively attributed to winnowing of primary depositional units following partial cementation by salt precipitates. This stratification breaks down at depth and is replaced by a gleyed horizon, resulting from drainage impedance by permafrost. Proximal aeolian accumulations on flu-vially inactive areas of the valley bottom may typify many other valleys in Spitsbergen.

[学科分类] 自然科学（综合）