Facies code | Lithofacies | Sedimentary structures |
Gmm | Matrix-supported, massive gravel | Weak grading |
Gcm | Clast-supported massive gravel | Pseudoplastic 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 coarse, may be pebbly | Broad, shallow scours |
Sl | Sand, very fine to coarse, may be pebbly | Low angle (<150) cross-beds |
Spo | Sand, fine to coarse | Overturned planar cross-beds |
Sto | Sand, fine to coarse | Overturned trough cross-beds |
Sf | Fine sand with mud | Flaser-rippled stratification |
Sw | Fine sand with mud | Wave-rippled stratification |
Hca | Fine sand with mud | Hummocky cross0stratification |
Scs | Fine sand with mud | Swaley cross-stratification |
Fr | Sand, silt, mud | Ripple to climbing ripple cross-lamination |
Fm | Sand, silt, mud | Massive |
Fl | Sand, silt, mud | Fine lamination, very small ripples |