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The Holocene
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Mid-Holocene glacial activity in the Pyrenees

A.F. Gellatly

School of Geography, University of Birmingham, Birmingham B15 2TT, UK

J.M. Grove

Girton College, Cambridge CB3 0JG, UK

V.R. Switsur

Godwin Laboratory, University of Cambridge, Cambridge CB2 3RS, UK

Radiocarbon dating of sediments from a bog at c. 2100 m in the Cirque de Troumouse provides the first reliable dating of Holocene glacier fluctuations in the Pyrenees. The oldest organic material in the bog provides a maximum date (5190 ± 90 BP) for moraines immediately downvalley, which are either Lateglacial or, more probably, Holocene in age. Bracketing dates on laminated glacioacustrine sediments in the bog indicate a Neoglacial event between 4955 ± 90 and 4654 ± 60 BP, which was probably contemporaneous with moraine ridges immediately upvalley. More recent Neoglacial events, as yet undated, are indicated by younger silt-rich sediments in the bog and two younger moraine sets on the cirque floor at altitudes of c. 2250-2350 m. 'Little Ice Age' events were more restricted in extent, and are recorded by younger moraines at c. 2360 and at c. 2650 m resting on and immediately below the cirque wall.

Key Words: Holocene • 'Little Ice Age' • radiocarbon dating • Pyrenees • moraine • glacier variations.

The Holocene, Vol. 2, No. 3, 266-270 (1992)
DOI: 10.1177/095968369200200309
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