1 10 2 https://theses.otagogeology.org.nz/files/original/cec601ea4128e73c0d2a56216c7b8123.pdf 670b64fa7165ea0da8ba7167b01831f9 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 ((167.355196512451954 -46.192325694983921,167.27027890815117 -46.187729948141836,167.282522347534098 -46.124394426805857,167.39508333509383 -46.078541446879093,167.517450904824813 -46.086995831322568,167.510213940033992 -46.154526774556508,167.477245631204624 -46.150075756869967,167.442022257282588 -46.14764872576491,167.415209077298613 -46.148481332413823,167.400236975368273 -46.154177271467368,167.398531336750096 -46.165883102954204,167.394850286672551 -46.176777235117925,167.384840770985647 -46.184144221616577,167.372194286617855 -46.187092973562699,167.354721192812463 -46.191944884123025,167.355196512451954 -46.192325694983921)) Author last name Last name of the Author McMurtrie Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? MSc Advisers Who supervised/advised this student Fordyce, R.E. Abstract The Abstract for this thesis This thesis describes the Eocene to Recent sedimentary sequence of the East Hump area, in the southern Waiau Basin, Western Southland. Cenozoic sedimentation in the East Hump area began in the Late Eocene with the deposition of terrestrial conglomerates and marginal marine sandstone of the Hump Ridge Formation. The Hump Ridge Formation is conformably overlain by deeper marine sandstone/mudstone interbeds of the Hauroko Formation and mudstone of the Waicoe Formation. This Eocene to Miocene sequence is unconformably overlain by the Late Miocene inner shelf conglomerate, sandstone and limestone of the Port Craig Formation, which in turn grades into the outer to mid shelf Late Miocene to Pliocene Te Waewae Formation. The following stratigraphic advances have been made: the boundary between the Hump Ridge Formation and Hauroko Formation is defined; the Hauroko Formation is divided into two members, the sandstone-dominated Breakneck Member, and the mudstone-dominated Hauroko Member; the boundary between the Port Craig Formation and Te Waewae Formation is redefined; the Port Craig Formation is correlated throughout using the lithofacies and biofacies concepts; and a new member (the Waikoau Member) of the Te Waewae Formation is proposed. These lithostratigraphic advances combined with chronostratigraphic data allow new interpretations of two areas of Te Waewae Bay coastal sediments. A chronostratigraphic map produced from foraminiferal and molluscan dating shows an Eocene to Early Miocene (Runangan to Altonian) sequence of Hump Ridge Formation, Hauroko Formation, and Waicoe Formation which youngs and thins to the south. The Port Craig Formation, which unconformably overlies these · sediments, was previously thought to be Tongaporutuan at the base, but foraminiferal dating now interprets it as Kapitean throughout. Dates from above and below the Miocene unconformity suggest it has a maximum duration of 17 million years (part of the Altonian Stage, Southland Series, and Tongaporutuan Stage). The time gap between these units increases to the south to 24 million years at J amiesons Creek, coinciding with decreasing thickness of the Waicoe Formation. The Miocene/Pliocene boundary (Kapitean/Opoitian) probably coincides with Ethological change from the Waikoau Member to the Deadwood Member in the Te Waewae Formation. A diverse macrofauna from the sandstone of the Kapitean Port Craig Formation allows biofacies correlation of outcrops in streams several kilometres apart. In contrast, the gastropod-dominated assemblages of the mudstone of the Te Waewae Formation are more uniform and include taxa which are of more chronostratigraphic ). t IV value. Fossils from both the Port Craig Formation and the Te Waewae Formatio,n are used to interpret paleoenvironment. Petrographic study of conglomerate, sandstone, and heavy minerals from the Hump Ridge, Hauroko and Port Craig formations indicate that Fiordland and cannibalised underlying sediments were the major sources of detritus. Provenance areas are narrowed using petrography, heavy minerals, previous published paleogeographic maps, and paleocurrents. Rhyolite and dacite from the Oligocene Hauroko Formation has been traced to a potential source of the Eastern Fiordland Volcanics around present Lake Te Anau. Similar clasts in the Port Craig Formation are probably reworked from the underlying Hauroko Formation as the East Hump area was surrounded by sediment sinks in the Late Miocene. Heavy minerals indicate the Brook Street terrane was a source of sediment in the Late Eocene and Early Miocene, and Southwest Fiordland was a possible source in the Late Eocene to Early Oligocene. Paleoenvironments of the sediments of the East Hump area are consistent with regional structural trends. The terrestrial to marginal marine Hump Ridge Formation (Runangan), the submarine fan complex of the Hauroko Formation (Whaingaroan), and the bathyal mudstone of the Waicoe Formation (Whaingaroan to Altonian) were deposited during the Eocene to Oligocene; thought to be a phase of oblique extension. The Miocene unconformity probably marks Middle to Late Miocene compression which caused uplift of Hump Ridge resulting in folding, faulting, and erosion of the sedimentary sequence. Back-arc subsidence allowed deposition of the shoreface to inner shelf Port Craig Formation (Kapitean) and the outer shelf Waikoau Member of the overlying Te Waewae Formation (Kapitean). Uplift in the Pliocene is reflected in shallowing to the mid shelf Deadwood Member of the Te Waewae Formation. This uplift continues to the present day, reflected by a flight of preserved Quaternary marine terraces. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Te Waewae Bay Southland Thesis description Number of pages, maps, CDs, etc. xiv, 262 p. : 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 1996McMurtrie Creator An entity primarily responsible for making the resource McMurtrie, Grant Bevan. Date A point or period of time associated with an event in the lifecycle of the resource 1996 Title A name given to the resource Cenozoic sediments of the East Hump area, Te Waewae Bay, Southland Subject The topic of the resource Cenozoic geology Sedimentology basin history Foraminifera Miocene Mollusca paleoenvironment https://theses.otagogeology.org.nz/files/original/e2cfcbad5839f034386f3eab4fc49ad8.pdf a201b1096ba627bc1047e4ac6b414449 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 ((167.347443095839424 -46.186709064359768,167.369620590039148 -46.187807039961569,167.374333088079595 -46.233888549869668,167.348264829992729 -46.232896399681188,167.347443095839424 -46.186709064359768)) Author last name Last name of the Author McIntyre Project type Is it an MSc, PhD, BSc(Hons) or PGDipSci? BSc(Hons) Advisers Who supervised/advised this student Fordyce, R.E. Abstract The Abstract for this thesis An area of coastal exposure of approximately 2 km in length in the Port Craig area on the western side of the Waiau basin was mapped in detail. The geology of this area is dominated by the upper Miocene (upper TongaporutuanKapitean) Port Craig Formation. In the study area the Port Craig Formation unconformably overlies crystalline basement rock with affinities with eastern Fiordland basement and older Cenozoic sediments; the Hump Ridge Formation and the Blackmount Formation. The depositional environment deepens from the time of deposition of the Hump Ridge Formation which is seen in the study area as a nonmarine coarse sandstone or a shallow marine fine sandstone, to the Blackmount Formation turbidite sequence inferred to have been deposited in a outer shelf setting. The unconformity between these older rocks and the Port Craig Formation represents a period of either non-deposition or erosion. Sedimentation recommences in the late Miocene with the deposition of the shallow marine Port Craig Formation. Movement along the Alpine Fault caused a t~ans_E~essi~~~l regime by the e~<:I _of _th~_ Oligocene, which resulted in thrusting of Hump Ridge over the Waitutu subbasin. This uplift was possibly responsible for shallowing on the western edge of the Waiau basin and the deposition of the Port Craig Formation. The Port Craig Formation is a coarse calcareous unit deposited in a high energy, shallow marine environment. The detritus found within the Port Craig Formation suggests the Hump Ridge area was major source of detritus for the Port Craig Formation. The Port Craig Formation shows evidence of deepening or a lower energy depositional environment. Later tectonic activity has affected the Port Craig Formation in the form of faulting and small scale folding. The study area has been tilted as part of the ~and Hill Point- Port Craig basement block giving the sediments a relatively consistent 3QO easterly dip. The faulting within the study area is on a relatively small scale and includes a component of sinistral strike slip movement. Department The department where the student is studying primarily. Geology Named locality Named locality describing the field area location. Port Craig Thesis description Number of pages, maps, CDs, etc. 59 leaves (some folded) : col. ill., maps ; 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 1993McIntyre_CM Creator An entity primarily responsible for making the resource McIntyre, Christine (Christine Mary) Date A point or period of time associated with an event in the lifecycle of the resource 1993 Title A name given to the resource Geology of Port Craig, Western Southland, New Zealand Subject The topic of the resource Sedimentology Lithostratigraphy Blackmount Formation Fiordland Complex Hump Ridge Formation Mollusca Port Craig Port Craig Beds stratigraphy Te Waewae Formation