Group | Class | Subclass | Classification criteria | Genesis |
GRAVELOUS SOILS | GL | GL1 | F < 20% F. Ip < 300 | Lateritic Gravels |
GL2 | 20% < F< 30% F. Ip < 600 or F < 20% 300 < F. Ip < 600 | |||
GL3 | F > 30% or F. Ip > 600 | |||
G | G1 | F < 15% F. Ip < 180 | Alluvial and Eluvionaries gravels | |
G2 | F > 15% F. Ip < 500 or F < 15% 180 < F. Ip < 500 | |||
G3 | F. Ip > 500 | |||
Ge | Ge1 | cf. G1 | Gravel of eruptive origin | |
Ge2 | cf. G2 | |||
Ge3 | cf. G3 |