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Quarterly Journal of Engineering Geology and Hydrogeology
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Quarterly Journal of Engineering Geology and Hydrogeology; 1995; v. 28; issue.3; p. 277-286;
DOI: 10.1144/GSL.QJEGH.1995.028.P3.06
© 1995 Geological Society of London

Article

Rock weathering descriptions: current difficulties

D. J. Cragg1 & J. Ingman2

1 Scott Wilson Kirkpatrick, , Bayheath House, Rose Hill West, Chesterfield S40 1JF, UK
2 Norwest Holst Soil Engineering Ltd, , Parkside Lane, Dewsbury Road, Leeds LS11 5SX, UK

The guidance given in BS5930:1981 for rock weathering descriptions at the material scale is considered to be inappropriate for UK practice, and is seldom applied to rock core logging. Practitioners turn to alternative weathering schemes for logging rock cores, some of which are inappropriate at the material scale; others are intended for specific, uniform lithologies and may also prove to be unsuitable when geological conditions vary from the presumed uniformity. The authors present examples from various geological situations, to demonstrate the difficulties arising when existing published weathering schemes are applied. The difficulties associated with deriving mass zonations from material scale descriptions are considered. The description of cores at the material scale is considered to require quantified detail, independent of the prescribed schemes currently existing.

Key Words: site investigation • weathering




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The description and classificatioin of weathered rocks for engineering purposes
Quarterly Journal of Engineering Geology and Hydrogeology, 1995; 28: 207 - 242.
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