کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5786423 1640639 2017 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
A new varve thickness record from Allt Bhraic Achaidh Fan, middle Glen Roy, Lochaber: implications for understanding the Loch Lomond Stadial glaciolacustrine varve sedimentation trends
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
A new varve thickness record from Allt Bhraic Achaidh Fan, middle Glen Roy, Lochaber: implications for understanding the Loch Lomond Stadial glaciolacustrine varve sedimentation trends
چکیده انگلیسی

Glen Roy, Lochaber is a key UK site for understanding Late Devensian environmental change, as it contains an annually-resolved glaciolacustrine varve record. This paper develops our understanding of varve sedimentation within Glen Roy through the examination of a new varve sequence located in a more proximal position on the Allt Bhraic Achaidh Fan, one of a series of major fans within the valley. This new varve record consists of c. 203 annual layers, much fewer years than at other sites in the Lochaber area probably due to five significant hiatuses within the record. Varve sediment characteristics and thickness are comparable to, but not statistically correlated with, other varve series that were used to construct a consolidated varve record for the area, the Lochaber Master Varve Chronology. Sedimentological characteristics, analysed by thin section micromorphology, suggest that varve thickness changes within the basin are controlled mainly by distance from the valley sides rather than the position of the ice margin during the Loch Lomond Readvance, as previously proposed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Proceedings of the Geologists' Association - Volume 128, Issue 1, February 2017, Pages 136-145
نویسندگان
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