1 10 1 https://theses.otagogeology.org.nz/files/original/6e7b0fc3294541f7fdb478c4f60779eb.pdf 0e07a9c560d9a84282b520012aa30025 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource Geology theses OU Geology thesis Thesis or dissertation completed by University of Otago Geology students Location WKT (WGS84) The location stored in WKT (WGS84) format POLYGON ((168.870616252290489 -46.040436426490992,168.872892415671714 -46.019084795228437,168.945062277374973 -46.051203633854492,168.937351186368858 -46.072363209696832,168.870616252290489 -46.040436426490992)) Author last name Last name of the Author Wright Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Campbell, J.D. Abstract The Abstract for this thesis Fossiliferous strata of the Murihiku Supergroup crop out in the Otamita Downs area, eastern Hokonui Hills, Southland, New Zealand. Detailed biostratigraphic subdivision indicates that this is the thinnest sequence of Triassic rocks yet mapped in the Hokonui Hills. This probably reflects a depositional setting distal from the volcanogenic source. At least three species of Rastelligera coexisted in the uppermost Triassic (Otapirian). The Otapirian (Triassic)-Aratauran (Jurassic) boundary, although not marked by any lithological change, is a pronounced biostratigraphic hiatus indicated by the extinction of Rastelligera and Clavigera .. The Jurassic Spiriferina ongleyi is placed in the genus Mentzelia thus M. kawhiana-M. ongleyi is the only Spiriferinid lineage to survive the boundary. Well preserved ammonite specimens from middle Aratauran beds are identified as Saxoceras sp. Extreme ribbing variation in Otapiria marshalli questions existing species designations. The Jurassic sediments host minor volumes of pebble conglomerate, and the uppermost Triassic Otamita Downs Boulder Conglomerate contains clasts up to 3.5 m in diameter. Clast composition in this unit varies widely and does not mirror the finer grained volcanogenic sediments. Common lithologies include granophyres, tonalites, undeformed greenschist fades volcaniclastics, and amphibolite fades metabasalts, some of arc ankaramite affinity. A common source is proposed for these clasts Rare clasts from the pebble conglomerates include metasedimentary quartzose schists with a complex structural history. The method of deposition of the boulders within the Otamita Downs Boulder Conglomerate is unclear; however the large size suggests minimal transport. If a transport direction is assumed from the south-west for the majority of the Murihiku sediments then the boulder association was derived from a different, probably closer source. A suite of rocks with some petrographic similarities can be found in the silicic association of the Dun Mountain Ophiolite Belt. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Hokonui Hills Otamita Southland Thesis description Number of pages, maps, CDs, etc. 17, 24, 37 p., 10 leaves of plates : ill. (some col.), maps (some col.) ; 30 cm. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Identifier An unambiguous reference to the resource within a given context 1990Wright Creator An entity primarily responsible for making the resource Wright, Edward, 1967- Date A point or period of time associated with an event in the lifecycle of the resource 1990 Title A name given to the resource Some aspects of the geology of the eastern Hokonui Hills Subject The topic of the resource Structural geology Lithostratigraphy Hokonui Hills Kelvin Peak Mandeville Murihiku Supergroup Otamita Downs Southland Region