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dc.contributor.advisorPratt, Brian R
dc.contributor.advisorMacNaughton, Robert B
dc.creatorHandkamer, Neal
dc.date.accessioned2021-04-19T21:15:41Z
dc.date.available2021-04-19T21:15:41Z
dc.date.created2021-04
dc.date.issued2021-04-19
dc.date.submittedApril 2021
dc.identifier.urihttps://hdl.handle.net/10388/13334
dc.description.abstractCambrian strata of the eastern Mackenzie Mountains, Northwest Territories, Canada, were deposited in the semi-enclosed, Colville Basin along the eastern flank of the Mackenzie Arch. The Mount Clark Formation is composed of nearshore sandstone and is overlain by deeper water siltstones, mudstones, and carbonates of the Mount Cap Formation. The contact between these formations is interpreted as recording a flooding event. Trilobite biostratigraphy indicates the presence of the traditional Bonnia–Olenellus through Glossopleura walcotti zones (Cambrian Series 2, Stage 4–Miaolingian, Wuliuan) and the diachronous nature of the flooding surface, spanning the late Dyeran–early Delamaran boundary. Above the Olenellus Zone, the Amecephalus arrojosensis–Eokochaspis nodosa Zone, the new Zacanthoidid n. gen. 1, n. sp. 1 Zone, the new Albertelloides mischi Zone, and Glossopleura walcotti Zone are recognized. Trilobite faunas from the Albertelloides mischi and Glossopleura walcotti zones are dominated by zacanthoidids and dolichometopids in contrast to other areas in Laurentia. They have a lower diversity of ptychoparioids and oryctocephalids and lack agnostoids, eodiscoids, dorypygids, and ogygopsidids. This suggests that zacanthoidids and dolichometopids were able to tolerate conditions that were unfavourable to the other groups, probably related to the semi-restricted nature of the basin. Four new, endemic species exhibit characteristics which are considered paedomorphic. This developmental process took place in three separate lineages, suggesting that heterochrony was also environmentally controlled. Five new genera and ten new species are described.
dc.format.mimetypeapplication/pdf
dc.subjectCambrian
dc.subjecttrilobite
dc.subjectNorthwest Territories
dc.subjectbiostratigraphy
dc.subjectpaleoecology
dc.titleBiostratigraphy and paleoecology of a unique trilobite fauna from the Mount Clark and Mount Cap formations (early and middle Cambrian), eastern Mackenzie Mountains, northwestern Canada
dc.typeThesis
dc.date.updated2021-04-19T21:15:42Z
thesis.degree.departmentGeological Sciences
thesis.degree.disciplineGeology
thesis.degree.grantorUniversity of Saskatchewan
thesis.degree.levelMasters
thesis.degree.nameMaster of Science (M.Sc.)
dc.type.materialtext
dc.contributor.committeeMemberPartin, Camille
dc.contributor.committeeMemberVelez, Maria
dc.contributor.committeeMemberBuatois, Luis
dc.creator.orcid0000-0002-9927-7856


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