(a; opposing page) This satellite image (acquisition date: 13 January 2020; grid location: 13°14′47″ N by 15°46′55″ W) was acquired from Google Earth Pro as an example of a tropical coastal belt from the Republic of The Gambia (Western Africa, Atlantic coast). (b) The coastal belt between A-A′ and B-B′ is approximately 6.0 km long and divided into six (6) cross-shore transects (separated by thin red lines), with the Large Marine Ecosystem (LME) designation in blue print and the terrestrial Ecoregion (ER) designation in brown print. Cross-shore transect catenary sequences composed of archetypes and sub archetypes are indicated in yellow print with the alphanumerical code approximating the location of the eco-geomorphological feature identified (refer to Table 1 for code definitions). An example of an individual alongshore domain composed of an archetypical catena sequence is shown in orange print with a double-ended arrow signaling the width of the alongshore codified swath. The Concised Alongshore Super Domain for the entire coastal belt is shown in green print and is formulated to be Barrier-Beach-Dune-Lagoon-Wetland-Upland (Ba-Be-Du-L-W-U).