Service interruption on Monday 11 July from 12:30 to 13:00: all the sites of the CCSD (HAL, EpiSciences, SciencesConf, AureHAL) will be inaccessible (network hardware connection).
Skip to Main content Skip to Navigation
Journal articles

Last Glacial Maximum active layer thickness in Western Europe, and the issue of 'tundra gleys' in loess sequences

Abstract : Late Marine Isotope Stage (MIS) 3 and MIS 2 loess-palaeosol sequences in Western Europe comprise alternating loess layer and 3-to 30-cm-thick bleached soil horizons with Fe-Mn oxide precipitations, which are usually interpreted as waterlogged active layers and referred to as 'tundra gleys'. Active layer thickness data derived from a regional climate model simulation and the fossils (shells, earthworm granules) found in 'tundra gleys' argue against such an assumption. Most of these horizons better correspond to Fe-depleted, slightly humic topsoil horizons or subsurface eluvial horizons and should be referred to as (incipient) Ag or Eg horizons. They formed during climate ameliorations associated with vegetation (cryptogams, herbs) development, possibly limited by long-lasting snow cover. Strong mixing usually occurred in these horizons due to the activity of anecic earthworms and frost activity.
Document type :
Journal articles
Complete list of metadata

https://hal.archives-ouvertes.fr/hal-03691433
Contributor : Pascal Bertran Connect in order to contact the contributor
Submitted on : Thursday, June 9, 2022 - 10:04:47 AM
Last modification on : Thursday, June 16, 2022 - 3:15:55 AM

File

2022 JQS LGM Active layer thic...
Publisher files allowed on an open archive

Identifiers

Collections

Citation

Pascal Bertran, Kim Stadelmaier, Patrick Ludwig. Last Glacial Maximum active layer thickness in Western Europe, and the issue of 'tundra gleys' in loess sequences. Journal of Quaternary Science, Wiley, 2022, ⟨10.1002/jqs.3434⟩. ⟨hal-03691433⟩

Share

Metrics

Record views

0

Files downloads

0