valley canyon ENVO ENVO:00000169 EcoLexicon:canyon FTT:165 FTT:200 FTT:415 FTT:416 FTT:417 FTT:418 FTT:419 FTT:420 FTT:511 Geonames:T.CNYN Relatively narrow, deep depression with steep sides, the bottom of which generally has a continuous slope. SWEETRealm:Canyon TGN:21424 TGN:21426 TGN:21427 TGN:21429 Wikipedia:Canyon barranca chasm defile flume (natural) gap gorge gulch quebrada ravine valley