Ostracod biostratigraphy of the Oligocene‐Miocene (upper Waitakian to lower Otaian) in southern New Zealand

Ayress, Michael

doi:10.1080/00288306.2006.9515173

Cited by 8 publications

(3 citation statements)

References 12 publications

(33 reference statements)

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“…These are interpreted to be correlative with a fossiliferous rudstone bed in the western region at Trig Z (Main Shell Bed within the Massive Packstone Facies) containing whole to moderately disarticulated body fossils of molluscs (Lentipecten hochstetteri, Serripecten, Cucullaea, Notocorbula, Spissatella), oysters, gastropods (turritellid, Sigapatella, naticids and scaphopods), brachiopods, calcareous worm tubes and echinoids. It is associated with an increase in benthic foraminiferal and ostracod species suggesting shallowing (Ayress 2006) (Fig. 3).…”

Section: Sequence Boundary 2 (Sb2) -Late Oligocene Lowstandmentioning

confidence: 94%

The effect of volcanism on cool-water carbonate facies during maximum inundation of Zealandia in the Waitaki–Oamaru region

Thompson

Bassett

Reid

2014

New Zealand Journal of Geology and Geophysics

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The paleogeography of the Waitaki-Oamaru region during the Oligocene-Miocene maximum inundation was defined by a volcanic paleohigh producing a rimmed cool-water carbonate shelf geometry. Basaltic surtseyan style cones became the setting for a productive cool-water carbonate factory isolated from terrigenous input. To the west, impure wackestones and calcareous siltstones contain terrigenous material derived from low relief landmasses farther to the west. A lowstand following the cessation of volcanism caused the paleohigh to become subaerially exposed, forming an extensive dissolution surface in the east correlative with submarine firmgrounds to the west. Stronger currents from the south and significant storm events sweeping over the high reworked carbonate and glauconitic sediment and deposited it in channels to the north. Carbonate deposition west of the paleohigh filled in the deeper part of the basin eventually resulting in a wider, shallower and more regular shelf environment. Depositional environments of the Waitaki-Oamaru region during the Waitakian (Late Oligocene-Early Miocene) were overall shallower than during the earlier Whaingaroan (Early Oligocene) Stage when a more complex paleotopography existed. This is unlike elsewhere in New Zealand where maximum depth was reached during the Waitakian Stage. Thus, the existence of an isolated, submerged paleohigh in a cool-water carbonate basin can have a significant effect on the evolution of that basin, stimulating carbonate factories to develop where they might otherwise not.

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Section: Sequence Boundary 2 (Sb2) -Late Oligocene Lowstandmentioning

confidence: 94%

The effect of volcanism on cool-water carbonate facies during maximum inundation of Zealandia in the Waitaki–Oamaru region

Thompson

Bassett

Reid

2014

New Zealand Journal of Geology and Geophysics

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“…Trachyleberis thomsoni Hornibrook (1952) from the Australo-New Zealand region, has been problematic. Jellinek and Swanson (2003) tentatively assigned Trachyleberis thomsoni Hornibrook (1952) to Glencoeleberis, and Ayress (2006) was similarly cautious. Brandão et al (2013) did not refer to this new genus but did exclude T. thomsoni Hornibrook (1952) from Trachyleberis.…”

Section: Family Cytheruridae Müller 1894mentioning

confidence: 99%

Marine Ostracoda (Crustacea) from the Late Oligocene Gellibrand Marl, Otway Basin, Victoria, Australia

Eglington¹

2019

Proc. R. Soc. Vic.

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A subsurface sample from Heywood-10 borehole, Otway Basin, Victoria, has provided the first ostracod assemblage of Oligocene age from the Gellibrand Marl (Heytesbury Group). Previous Gellibrand Marl ostracod assemblages were Miocene. This Late Oligocene assemblage of 384 specimens includes 50 species and subspecies from 34 genera across 18 families; 24 taxa are placed in open nomenclature. Of the taxa discussed, several appear to be new species but with too few specimens for them to be described as such. The reciprocal of Simpson's Diversity Index was applied to assist assemblage comparisons. The Gellibrand Marl assemblage is larger, contains more families, genera and taxa but is less diverse than a smaller assemblage from the Early Oligocene Narrawaturk Formation (Nirranda Group) at the same location, and more diverse than an assemblage from the Early Oligocene/Ruwarung Member, South Australia. There are notable differences in the dominant taxa present in each assemblage. In the Gellibrand Marl, Pontocyprididae predominate; in Narrawaturk Formation, Cytheruridae and Xestoliberididae are most abundant; and in the South Australian assemblage, Bairdiidae by far the most numerous. This Gellibrand Marl collection has the characteristics of an at least partly allocthanous assemblage, the habitat a well-oxygenated mid-shelf environment. No cold or deep-water taxa are present.

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“…Distribution of Ostracoda from marine, brackish and coastal waters on 7 species (Krithe bartonensis, K. keyi, K. mersinensis, K. monosteracensis, K. praetexta, K. reniformis, K. similis) from Turkey region were examined to decipher the ecological calculations [10]. Biostratigraphic studies using different species of genus Krithe in New Zealand addresses on the diverse environmental settings [11]. An appraisal on the Ostracoda Krithe from deeper regions of Southern Indian Ocean explained the diversification effects of the genus and the paleoecological traits [12].…”

Section: Oceanography and Fisheries Open Access Journalmentioning

confidence: 99%

Genus Krithe (Ostracoda) as a Proxy to Decipher Paleoceanography: A Global Review of the Genu

Radhakrishnan

2019

OFOAJ

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Ostracoda genus Krithe as paleo-oceanographic biomarkersBeing benthonic and abundant in ocean sediments (not observed in shallow tropical zone), Ostracoda genus Krithe marks its importance more than any other genera for paleooceanographic studies. Diversification of the genus Krithe is dominant beyond 1000m water depth, in bathyal and abyssal zone [5]. Glacial-interglacial cycles are marked using abundance and diversity of Ostracoda genus Krithe from Eastern Equatorial Pacific [3]. Higher counts of genus Krithe represents a cooler temperature and vice versa. Krithe is common along the Upper Cretaceous region in northern Gulf coastal plain of North America. The nature of the sediments as well as the oxygen concentrations are the reason for the occurrence of the genus to a limited area, which implies on the paleoenvironment [6]. Extensive studies on East China and Yellow seas, wherein about 520 grab samples were collected and examined for the distribution pattern of Krithe and Parakrithe genera focusing mainly on the oceanographic changes [7].The genera were observed to occur in marginal marine conditions, and inner and middle shelf of the East China Sea and absence of the species addresses the lower salinity, higher temperature and coarser nature of the sediments and also the size of the shell varies with water temperature [8], which makes it useful for understanding bottom water chemistry and the temperature history of the ocean.Deeper part of North Atlantic is dominated by diversified species of Krithe and the age determined aiding the microfossil assemblage is Eocene to Oligocene [9]. The significance of the temperature on shell growth and morphometry in taxa

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Ostracod biostratigraphy of the Oligocene‐Miocene (upper Waitakian to lower Otaian) in southern New Zealand

Cited by 8 publications

References 12 publications

The effect of volcanism on cool-water carbonate facies during maximum inundation of Zealandia in the Waitaki–Oamaru region

The effect of volcanism on cool-water carbonate facies during maximum inundation of Zealandia in the Waitaki–Oamaru region

Marine Ostracoda (Crustacea) from the Late Oligocene Gellibrand Marl, Otway Basin, Victoria, Australia

Genus Krithe (Ostracoda) as a Proxy to Decipher Paleoceanography: A Global Review of the Genu

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