Duba wurin da ke ƙasa sannan ka amsa tambayar daga baya a cikin harshe ɗaya kamar yadda wurin yake:  Passage: Har zuwa yanzu masana kimiyya sun gane nau'i daya ne kawai na tsarin ilimin geological a kan Umbriel <unk> craters. Fuskar Umbriel tana da kwararo-kwararo masu yawa da kuma manya fiye da Ariel da Titania. Yana nuna mafi ƙarancin ayyukan ƙasa. A zahiri, daga cikin watannin Uranus kawai Oberon yana da kwararan fuka-fuki fiye da Umbriel. Girman diamita da aka lura ya kasance daga 'yan kilomita a ƙananan ƙarshen zuwa kilomita 210 don mafi girma da aka sani, Wokolo. Dukkanin raƙuman da aka sani a kan Umbriel suna da kololuwar tsakiya, amma babu wani raƙuman da ke da haskoki. Kusa da equator na Umbriel shine mafi girman fasalin farfajiyar: Wunda crater, wanda ke da diamita na kimanin kilomita 131. Wunda yana da babban zoben abu mai haske a kan bene, wanda zai iya zama ajiyar tasiri ko ajiyar carbon dioxide kankara. A kusa, ana ganin su tare da terminator, sune ƙwanƙwasa Vuver da Skynd, waɗanda ba su da gefuna masu haske amma suna da kololuwar tsakiya mai haske. Nazarin bayanan bayanan kafa na Umbriel ya bayyana yiwuwar babban fasalin tasiri wanda ke da diamita kusan kilomita 400 da zurfin kusan kilomita 5. Kamar sauran watannin Uranus, saman Umbriel an yanke shi ta hanyar tsarin canyons da ke fuskantar arewa maso gabas zuwa kudu maso yamma. Duk da haka, ba a san su ba bisa hukuma saboda ƙarancin hoton hoton da kuma bayyanar wannan wata, wanda ke hana taswirar geological.Umbriel's surface mai nauyi mai yiwuwa ya kasance mai karko tun lokacin Late Heavy Bombardment. Alamomin kawai na tsohuwar aikin ciki sune canyons da polygons masu duhu - wuraren duhu tare da siffofi masu rikitarwa waɗanda ke auna daga dubun zuwa ɗaruruwan kilomita a fadin. An gano polygons daga ƙayyadaddun hotuna na Voyager 2 kuma an rarraba su fiye ko žasa a kan farfajiyar Umbriel, suna fuskantar arewa maso gabas zuwa kudu maso yamma. Wasu polygons sun dace da zurfin 'yan kilomita kaɗan kuma wataƙila an ƙirƙira su ne a lokacin farkon aikin tectonic. A halin yanzu babu wani bayani game da dalilin da yasa Umbriel yake da duhu da daidaituwa a cikin bayyanar. Za'a iya rufe farfajiyar ta da wani siririn siririn abu mai duhu (wanda ake kira umbral material)...  Tambaya: Menene sunan mafi girma da aka sani crater a Uranus?
Wokolo