furrows  search
RTbottom features
 channels
 erosion features
 exine
 geomorphology
 grooves
 ocean floors
 pits
 rills
 sedimentary structures
 soil erosion
 striations
 trenches
 troughs
 valleys
SNUse more specific term if available. Sometimes used for extraterrestrial remotely-sensed features. Added to Thesaurus in 1993.