richteriterickarditericolettaiteride numberrideaurider or riders or ridersridge or ridges or ridgesridge pushridged iceriding comfort index or rci or rci or comfort indexriding qualityriedeniteriegelriel discontinuityrifflerifflerrifle barrift basin or rift basins or rift basinsrift faultrift or rifting or riftingrift trough or rift valley or rift valleyrift valley or rift or riftrift zonerifting or rift or riftrig or drilling or drillingriggingright bankright or handed or dextrorotatory or dextrorotatoryright or lateral fault or right or lateral or right or lateralright or slip faultright sectionright slip or dextralright slip or dextral or dextralright stepping jog or right stepping or right steppingright valverigid annual regulationrigid gas or permeable contact lensesrigid patternrigid penstock or fixed penstock or fixed penstockrigidityrigidity modulusrigoletrilanditerillrill castrill erosion or rillwork or rillwork or rillingrill mark or rill marks or rill marks or rillmarkrill washrille or rima rill or rima rillrillenkarren
