| 1-2-1 Fine to medium grained smooth sediment |
| 1-2-2 Mixed smooth sediment and rock |
| 1-2-3 Rock and boulders, rugose |
| 1-2-4 Medium to coarse grained, rippled sediment |
| 1-2-5 Smooth, hard anthropogenic material |
| 1-2-6 Rugged, hard anthropogenic material |
| 1-3-1 Fine to medium grained smooth sediment |
| 1-3-2 Mixed smooth sediment and rock |
| 1-3-3 Rock and boulders, rugose |
| 1-3-4 Medium to coarse grained, rippled sediment |
| 1-4-1 Fine to medium grained smooth sediment |
| 1-4-2 Mixed smooth sediment and rock |
| 1-4-3 Rock and boulders, rugose |
| 1-4-4 Medium to coarse grained, rippled sediment |
| 2-2-1 Fine to medium grained smooth sediment |
| 2-2-2 Mixed smooth sediment and rock |
| 2-2-3 Rock and boulders, rugose |
| 2-2-4 Medium to coarse grained, rippled sediment |
| 2-3-1 Fine to medium grained smooth sediment |
| 2-3-2 Mixed smooth sediment and rock |
| 2-3-3 Rock and boulders, rugose |
| 2-3-4 Medium to coarse grained, rippled sediment |
| 2-4-1 Fine to medium grained smooth sediment |
| 2-4-2 Mixed smooth sediment and rock |
| 2-4-3 Rock and boulders, rugose |
| 2-4-4 Medium to coarse grained, rippled sediment |