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(Article of periodic en Anglais - 2012)

Document title

The role of peri-glacial active layer development in determining soil-regolith thickness across a Triassic sandstone outcrop in the UK

Authors(s) and Affiliation(s)

TYE A.M. (1) ; KEMP S.J. (1) ; LARK R.M. (1) ; MILODOWSKI A.E. (1) ;
(1) British Geological Survey, Kingsley Dunham Centre, Nottinghamshire, Keyworth, ROYAUME-UNI

Abstract

This paper examines the weathering processes that have combined to produce the distribution of soil-regolith (SR) thickness across the Triassic Sherwood Sandstone Group outcrop in Nottinghamshire. Firstly, the AA. examine the long-term chemical weathering processes in relation to the physical properties of the soil-regolith-saprolite. Then, they propose that the mechanism through which the clay cement was eased apart was through freeze–thaw processes associated with the summer "active layer development (ALD)" during the last glacial activity in the UK. They tested this theory by developing a Monte Carlo simulation based on a simplified version of the Stefan equation. Current Arctic datasets of air and ground temperatures were obtained to provide starting conditions for input variables. These were combined with known data for thermal conductivity, bulk density and moisture content of the Sherwood Sandstone regolith. Model predictions of the distribution of SR thickness accurately reflect the observed distribution thickness from the borehole logs

Source

Article of periodic

published at : Earth surface processes and landforms / ISSN 0197-9337 / CODEN ESPLDB

Editor : Wiley, Chichester - ROYAUME-UNI (1981)

Millesime : 2012, vol. 37, no9 [pp. 971-983]

Bibliographic references : 1 p.

Collation : 8 fig., 6 tabl.

Language

Anglais

INIST-CNRS, Cote INIST : 17355

Digital Object Identifier

Go to electronic document thanks to its DOI : doi:10.1002/esp.3216

Tous droits réservés © Prodig - Bibliographie Géographique Internationale (BGI), 2013
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