Nzira chaiyo yekuumbwa kwayo haizivikanwe zvechokwadi, asi fungidziro inogamuchirwa zvakanyanya inoratidza kuti kumucheto kweCathedral Formation reef kwakabviswa kubva kune mamwe matombo, kutsvedza uye kutakurwa kure nemakiromita <unk> anozvimiririra kubva kumucheto weStephen. Zvadaro kuora kwekukanganisa kwakatungamira kune hwaro hwechisote chakareba anenge 160 m, pasi pekudzika kwakamutswa nemafungu panguva yemadutu. Ichi chirevo chakatwasuka chaive chakaumbwa necalcareous reefs yeCathedral Formation, iyo yakaumbwa nguva pfupi pamberi pekuiswa kweBurgess Shale. Nzira chaiyo yekuumbwa kwayo haizivikanwe zvechokwadi, asi fungidziro inogamuchirwa zvakanyanya inoratidza kuti kumucheto kweCathedral Formation reef kwakabviswa kubva kune mamwe matombo, kutsvedza uye kutakurwa kure nemakiromita <unk> anozvimiririra kubva kumucheto weStephen.
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