Landform description Code Beach Man modified
I. Erosional coasts (scoured, beaches poorly developed) 1000 A. Marine with wave erosion and cliffs 1100 1. Low (5 30 m) 1110 1111 1119 2. Medium (30 100 m) 1120 1121 1129 3. High ( >100 m) 1130 1131 1139 B. Nonmarine (land erosion) 1200 1. Glaciated coast 1210 1211 1219 a. Fjord (drowned valley) 1220 1221 1229 b. Indented fiard (low-lying inlet) 1230 1231 1239 mud flats 1234 salt marsh 1235 c. Rocky glacial coast 1240 1241 1249 salt marsh 1245 2. Nonglacial irregular coast 1300 a. Strongly embayed, nonrocky 1310 1311 1319 b. Strongly embayed, rocky 1320 1321 1329 c. Estuaries 1330 1331 1339 mud flats 1334 salt marsh 1335 mixed types 1338 3. Ice coasts 1400 4. Drowned karst topography 1500 II. Depositional coasts (sediment accumulations and well-developed beaches) 2000 A. Marine deposit 2100 1. Coastal plain beach 2110 2111 2119 salt marsh 2115 2. Beach rock (beach sediment cemented by carbonates) 2112 3. Barrier coast 2120 2121 2129 a. barrier island 2122 b. bay barrier 2123 c. mud flats 2124 d. salt marsh 2125 e. cuspate foreland 2126 f. spit 2127 g. mixed 2128 B. River deposits 2200 1. Alluvial plain 2210 2211 2219 2. Delta environment 2220 2221 2229 a. mud flats 2224 b. salt marsh 2225 c. mixed 2228 C. Marine/fluvial deposits (Lagoonal coast) 2250 2251 2259 1. Mud flats 2254 2. Marsh/mangrove 2255 3. Mixed 2258 D. Glacial deposits 2300 1. Outwash plain 2310 2311 2319 2. Moraine 2320 2321 2329 3. Drumlin 2330 2331 2339 salt marsh 2315 4. Drift 2340 2341 2349 salt marsh 2345 5. Composite 2350 2351 2359 E. Biogenic 2400 1. Reefs (coral, oysters, algal) a. fringing 2410 2411 2419 b. barrier 2420 2421 2429 2. Barrier reef with an associated mangrove swamp 2425 3. Swamp/mangrove 2450 2451 2459 F. Volcanic coasts 2500 1. Lava flows 2510 2511 2519 2. Tephra, ash 2520 2521 2529 3. Composite/caldera 2530 2531 2539