Nazarin daidaiton kasa wato Geomorphology (daga tsohuwar yaren Girkanci : γῆ, gê, "ƙasa"; μορφή, morphḗ, "form"; da λόγος, Logos|lógos, "karatu") shine binciken kimiyya na asali da juyin halittar yanayin ƙasa da fasali na sifar Kasar da aka yi ta jiki, sunadarai ko hanyoyin nazarin halittu masu aiki a ko kusa da duniya. Geomorphologists nemi su fahimci dalilin da ya sa shimfidar duba hanyar da suka aikata, to fahimta landform da ƙasatarihi da kuma muhimmancin da kuma hango ko hasashen canje-canje ta hanyar hade da filin lura, jiki gwaje-gwajen da lambobin gwaji. Geomorphologists suna aiki a cikin fannoni kamar ilimin ƙasa (geology), ilimin kimiyyar gwaje-gwaje sifar duniya wato geodesy, geology engineering, archeology, climatology and geotechnical engineering. Doron kasa na duuniya ta ginu ne ta hanyar matakan bisa wanda suka bada siffar shimfidar wurare, da kuma geologic matakai da suka haddasa tectonic karfafa da kuma subsidence, da kuma siffar da jihar bakin teku labarin kasa. Gilbert, Grove Karl, and Charles Butler Hunt, eds.