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__NOTOC__
{{OR/17/050}}

{| class="wikitable"
|- style="vertical-align:top;"
| '''CLASS'''
| '''COLLAPSIBLE DEPOSITS'''
| '''RUNNING SAND'''
| '''COMPRESSIBLE DEPOSITS'''
| '''SLOPE INSTABILITY (LANDSLIDES)'''
| '''SOLUBLE ROCKS (DISSOLUTION)'''
| '''SHRINK SWELL'''
|- style="vertical-align:top;"
| '''A'''
| Deposits with potential to collapse when loaded and saturated are believed not to be present.
| Running sand conditions are not thought to occur whatever the position of the water table. No identified constraints on land use due to running conditions.
| Compressible strata are not thought to occur.
| Slope instability problems are not thought to occur but consideration to potential problems of adjacent areas impacting on the site should always be considered.
| Soluble rocks are either not thought to be present within the ground, or not prone to dissolution. Dissolution features are unlikely to be present.
| Ground conditions predominantly non-plastic.
|- style="vertical-align:top;"
| '''B'''
| Deposits with potential to collapse when loaded and saturated are unlikely to be present.
| Running sand conditions are unlikely. No identified constraints on land use due to running conditions unless water table rises rapidly.
| Compressibility and uneven settlement problems are not likely to be significant on the site for most land uses.
| Slope instability problems are not likely to occur but consideration to potential problems of adjacent areas impacting on the site should always be considered.
| Soluble rocks are present within the ground. Few dissolution features are likely to be present. Potential for difficult ground conditions or localised subsidence are at a level where they need not be considered.
| Ground conditions predominantly low plasticity.
|- style="vertical-align:top;"
| '''C'''
| Deposits with potential to collapse when loaded and saturated are possibly present in places.
| Running sand conditions may be present. Constraints may apply to land uses involving excavation or the addition or removal of water.
| Compressibility and uneven settlement potential may be present. Land use should consider specifically the compressibility and variability of the site.
| Slope instability problems may be present or anticipated. Site investigation should consider specifically the slope stability of the site.
| Soluble rocks are present within the ground. Some dissolution features may be present. Potential for difficult ground conditions are at a level where they may be considered, localised subsidence need not be considered except in exceptional circumstances.
| Ground conditions predominantly medium plasticity.
|- style="vertical-align:top;"
| '''D'''
| Deposits with potential to collapse when loaded and saturated are probably present in places.
| Running sand conditions are probably present. Constraints may apply to land uses involving excavation or the addition or removal of water.
| Compressibility and uneven settlement hazards are probably present. Land use should consider specifically the compressibility and variability of the site.
| Slope instability problems are probably present or have occurred in the past. Land use should consider specifically the stability of the site.
| Soluble rocks are present within the ground. Many dissolution features may be present. Potential for difficult ground conditions are at a level where they should be considered. Potential for subsidence is at a level where it may need to be considered.
| Ground conditions predominantly high plasticity.
|- style="vertical-align:top;"
| '''E'''
| Deposits with potential to collapse when loaded and saturated are present.
| Running sand conditions are almost certainly present. Constraints will apply to land uses involving excavation or the addition or removal of water.
| Highly compressible strata present. Significant constraint on land use depending on thickness.
| Slope instability problems almost certainly present and may be active. Significant constraint on land use.
| Soluble rocks are present within the ground. Numerous dissolution features may be present. Potential for difficult ground conditions should be investigated. Potential for localised subsidence is at a level where it should be considered.
| Ground conditions predominantly very high plasticity.
|}

[[Category:OR/17/050 User guide for the British Geological Survey GeoSure dataset: Version 8 | 06]]

OR/17/050 Appendix 1 GeoSure legends - Revision history

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Dbk at 08:34, 10 January 2018