Kammala wannan jumla: Yankin yana nuna yanayin karst, tare da dutsen dutsen da ya ƙunshi manyan duwatsu masu duwatsu da ƙananan yankuna na dolomites da Quaternary sediments. Eocene flysch yana samar da iyakar kudu maso yammacin yankin, wanda tafkin tafkin ya kwashe kuma inda Ombla ya tashi. An kafa duwatsun ne yayin da aka ajiye tarin tarin carbonate tsakanin Norian da Late Cretaceous a matsayin Adriatic Carbonate Platform, har zuwa zurfi. A cikin Eocene da farkon Oligocene, Adriatic Plate ya koma arewa da arewa maso gabas, yana ba da gudummawa ga Alpine orogeny ta hanyar ɗagawar tectonic na Dinarides. Tsarin karst na kwari ya samo asali ne daga bayyanar dandalin carbonate ga yanayin yanayi. Karstification ya fara ne bayan Dinarides na ƙarshe a cikin Oligocene da Miocene, lokacin da carbonates suka fallasa tasirin yanayi; wannan ya faɗaɗa zuwa matakin da ke ƙasa da matakin teku na yanzu, wanda aka fallasa a lokacin Last Glacial Maximum. An kirkiro wasu tsarin karst yayin faduwar matakin teku na baya, musamman rikicin gishiri na Messinian. Tsarin ilimin ƙasa na yankin yana nuna ayyukan tectonic na kwanan nan a cikin ruwa, tare da ɓata tsakanin Hum da Ombla. Wata girgizar kasa mai karfi da ta faru a yankin kwanan nan ita ce
Girgizar kasa ta 1979 Montenegro, auna 7.0 a kan sikelin Richter. Girgizar ƙasa mai ƙarfi kawai a cikin yankin nan da nan ita ce girgizar ƙasa ta Dubrovnik ta 1667, wanda tsunami ya biyo baya.