Difference between revisions of "Colluvic material (WRB)"
imported>Thierry Daunois (Created page with ''''Colluvic material''' is one of the diagnostic materials used, in the WRB system, to discriminate some soils from others. ==Description== Colluvic material : ==RSG in which c...') |
imported>Jacques Ducloy m (5 revisions imported) |
||
| (4 intermediate revisions by one other user not shown) | |||
| Line 2: | Line 2: | ||
==Description== | ==Description== | ||
| − | Colluvic material | + | Colluvic material (from Latin ''colluvio'', mixture) is formed by sedimentation through human-induced erosion. It normally accumulates in foot slope positions, in depressions or above hedge walls. The erosion may have taken place since Neolithic times. |
| + | |||
| + | ==Field identification== | ||
| + | |||
| + | The upper part of the colluvic material shows characteristics (texture, colour, pH and organic carbon content) similar to the surface layer of the source in the neighbourhood. Many colluvic materials have [[Artefacts (WRB)|artefacts]] such as pieces of bricks, ceramics and glass. Stratification is common although not always easily detectable, and many colluvic materials have a [[Lithological discontinuity (WRB)|lithological discontinuity]] at their base. | ||
==RSG in which colluvic material can be observed== | ==RSG in which colluvic material can be observed== | ||
| Line 13: | Line 17: | ||
* The [http://www.fao.org/ag/agl/agll/wrb/doc/wrb2007_corr.pdf FAO reference text], (2007 version) | * The [http://www.fao.org/ag/agl/agll/wrb/doc/wrb2007_corr.pdf FAO reference text], (2007 version) | ||
| + | |||
| + | [[Category:Diagnostic materials (WRB)]] | ||
Latest revision as of 18:15, 28 June 2017
Colluvic material is one of the diagnostic materials used, in the WRB system, to discriminate some soils from others.
Contents
Description
Colluvic material (from Latin colluvio, mixture) is formed by sedimentation through human-induced erosion. It normally accumulates in foot slope positions, in depressions or above hedge walls. The erosion may have taken place since Neolithic times.
Field identification
The upper part of the colluvic material shows characteristics (texture, colour, pH and organic carbon content) similar to the surface layer of the source in the neighbourhood. Many colluvic materials have artefacts such as pieces of bricks, ceramics and glass. Stratification is common although not always easily detectable, and many colluvic materials have a lithological discontinuity at their base.
RSG in which colluvic material can be observed
See also
- The FAO reference text, (2007 version)
