| Ss(s/m)_r/u; Soft unconsolidated sediment (sand and mud), predominantly rippled |
| Ss(s/m)t_u?; Terrace, or possibly delta/fan, comprised of unconsolidated sediment (sand and mud) (inferred) |
| Ss(s/m)h_e/u; Pockmarks or depressions in soft unconsolidated sediment (sand and mud) |
| Ss(s/g)_u; Soft unconsolidated sediment (sand and gravel) on flat shelf |
| Ss(s/g)y_u; Soft unconsolidated sediment (sand and gravel) of nearshore delta |
| Ss(s/g)y_h/u; Hummocky, soft unconsolidated delta sediment (sand and gravel) |
| Ssm_u; Unconsolidated sediment mound |
| Sme_c/u; Mixed habitat of soft unconsolidated sediment overlying hard consolidated sedimentary bedrock |
| Smm_l/u; Mixed habitat of soft unconsolidated sediment covering edges of hard carbonate mounds |
| Shm_l; Hard mound comprised of carbonate rock |
| She_c; Hard consolidated sedimentary bedrock outcrop |
| Shd_c/d; Deformed and differentially eroded sedimentary bedrock outcrop |
| Sh(b)/p_c; Hard consolidated sedimentary rock boulder or pinnacle |
| Ss(s/m)_a-td/u; Trawl grooves and marks in unconsolidated sediment (sand and mud) |
| Ss(s/m)_a/u(q); Oil platform-generated shell hash mixed with soft unconsolidated sediment (sand and mud) |
| Ss(s/g)_a-dm; Anthropongenically deposited unconsolidated sediment adjacent to man-made island |
| Ssm_a/u(q); Soft shell hash mound and unconsolidated sediment adjacent to oil platform (anthropogenic) |
| Ssh_a-s/u?; Oil-platform related structures east of Platform "A" in soft unconsolidated sediment |
| Smm_a-p/u; Mixed habitat of soft unconsolidated sediment forming linear ridge over a hard anthropogenic feature (pipeline) |
|
| Smh_a-p/u; Mixed habitat of soft unconsolidated sediment in a linear trough overlying a hard anthropogenic feature (pipeline) |
| Smh_a-c/u; Mixed habitat of soft unconsolidated sediment in a linear trough overlying a hard anthropogenic feature (cable) |
| Shm_a-s(q); Oil platform structural foundation framework (legs and pipes) and shell mound |
| Sh_a-p; Hard anthropogenic feature (pipeline) |
| Sh_a-g; Hard anthropogenic feature (groin or jetty) |
| 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 Rugged anthropogenic material |
| 1-2-5 Smooth 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 Rugged anthropogenic material |
| 1-3-5 Smooth anthropogenic material |
