*1:ヤルダン、風食嶺、Yardangs are streamlined hills or ridges carved from any consolidated or semiconsolidated material – or, occasionally, bedrock – by wind erosion (aided by airborne dust and sand grains) and deflation (the removal of particles by wind). http://ougseurope.org/rockon/surface/yardangs.asp
*2:峡谷 "a deep, elongated, steep-sided depression" http://planetarynames.wr.usgs.gov/jsp/append5.jsp
