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