Masayendisiti kusvika parizvino vakaziva chete kirasi imwe geological chinhu pamusoro Umbriel <unk> craters. Zvisinei, pamusoro Umbriel ane zvikuru uye yakakura craters pane kuita Ariel uye Titania. Zvinoratidza zvishoma geological basa. Kutaura zvazviri, pakati Uranian mwedzi chete Oberon ane zvakawanda kukanganisa craters pane Umbriel. The akacherechedza crater diameters siyana kubva makiromita mashomanana panguva yakaderera mugumo kuti 210 makiromita nokuti pakukura anozivikanwa gomo, Wokolouth. craters zvose kuzivikanwa pamusoro Umbriel vane nechepakati nenhongonya, asi hapana crater ane mwaranzi. Pedyo neEquator Umbriel kuti rinonyanya pachena pamusoro chinhu: Wunda gomo, iro rine dhayamita anenge 131 km. Wunda ane guru rakajeka zvinhu pamusoro payo, izvo zvingava dhipoziti kana yakasimba carbon dioxide. Pedyo nomwedzi, zvisinei, craters vari kuonekwa pamwe Uranus terminator, uye craters vari yakadzika zvishoma geological basa.
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