Very Coarse Soil Classification
The classification of very coarse types of soil according to the table requires very large samples. In that case, it is impossible to extract representative samples from borings [DINENISO14688:2001].
Table:
Classification of very coarse soil as per ISO 14688-2 [DINENISO14688:2004]
| Fraction | Percent by mass | Term |
|---|---|---|
| Boulders | < 5 | Low boulder content |
| 5 to 20 | Medium boulder content | |
| > 20 | High boulder content | |
| Cobbles | < 10 | Low cobble content |
| 10 to 20 | Medium cobble content | |
| > 20 | High cobble content |
