Facies code | Lithofacies | Sedimentary structures |
Gmm | Matrix-supported. massive gravel | Weak grading |
Gcm | Clast-supported massive gravel | Pseudo plastic debris flow |
Gt | Gravel. stratified | Trough cross-beds |
Gp | Gravel. stratified | Planar cross-beds |
St | Sand. medium to very coarse. may be pebbly | Solitary or grouped trough cross-beds |
Sp | Sand. medium to very coarse. may be pebbly | Solitary or grouped planar cross-beds |
Sr | Sand, very fine to coarse | Ripple marks of all types |
Sh | Sand, very fine to very coarse. may be pebbly | Horizontal lamination. parting lineation |
Sm | Sand, fine to coarse | Massive or faint lamination |
Ss | Sand, very fine to very coarse. may be pebbly | Broad. shallow scours |
Sl | Sand, very fine to very coarse. may be pebbly | Low-angle (<15˚) cross-beds |