Oxygen Isotope Paleotemperature Determinations of Australian Cainozoic Fossils

Dorman, F. H.; Gill, Edmund D.

doi:10.1126/science.130.3388.1576

Cited by 26 publications

(21 citation statements)

References 6 publications

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“…other workers (Urey e't al., 1951;Zhirmunskiy et al, 1967;Berlin et at., 1966;Dorman and Gill, 1959;Bowen, 1961c), and with theories of belemnite life history (ct. Stevens, 1965, pp. 55-56;Saks and Nalnyaeva, 1966, p. 192).…”

Section: Growth Stagesmentioning

confidence: 99%

Oxygen isotope studies on Jurassic and Cretaceous belemnites from New Zealand and their biogeographic significance

Stevens

Clayton

1971

New Zealand Journal of Geology and Geophysics

125

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<' I (0 18 ) and <' I (C13) results and isotopic temperatures are presented for transverse sections of New Zealand belemnites (Belemnopsis, Hibolithes, Dimitobelus) obtained from Jurassic strata correlated with Bajocian-Bathovian, Callovian, Kimmeridgian and Lower Tithonian, and Cretaceous strata correlated with Albian-Maastrichtian. Growth layer analyses also were carried out on 15 Jurassic and Cretaceous belemnites.Many of the belemnite specimens were found to be chemically altered to varying degrees, but growth analyses showed that the high isotopic temperatures which alter· ation is expected to produce were confined to two areas: surrounding the apical line and adjacent to the periphery of the specimen. Between these two areas there are generally plausible isotopic temperatures, and there is no reason to suspect that the temperature record has not been preserved there in its original form. Three or four major growth stages may be recognised in New Zealand belemnite guards and growth layer analyses suggest that these are annual; if this is so then in this respect the belemnites match the modern squids in having a three· or four.year life cycle. Variations in isotopic temperature of the be1mnites are comparable with those experienced seasonally by modern squids. Isotopic temperatures for the Jurassic and Cretaceous of New Zealand can be compared with sea water surface temperatures around the present day New Zealand coasts (36 0 _46 0 S. Lat.)' and inferred temperatures, based on these comparisons, are as follows: Upper Jurassic -temperatures slightly cooler than those of the present day; Albian and Cenomanian -temperatures slightly warmer; Turonian-?Coniacian -temperatures markedly warmer; Santonian-Maastrichtian -tem· peratures slightly warmer in the Santonian, but more so in the Campanian and Upper Maastrichtian. The New Zealand oxygen isotope results indicate a probable mid· latitude position, in the warm·temperate climatic zone, for New Zealand in the Jurassic and Cretaceous. New Zealand oxygen isotope results are compared with those obtained from overseas.

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Section: Growth Stagesmentioning

confidence: 99%

Oxygen isotope studies on Jurassic and Cretaceous belemnites from New Zealand and their biogeographic significance

Stevens

Clayton

1971

New Zealand Journal of Geology and Geophysics

125

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“…late Middle or early Late Miocene which is known to be climatically cooler than in the late Early to early Middle Miocene in S.E. Australia (Dorman & Gill, 1959;McKenzie, 1974;Abele et al, 1976;McGowran, 1979;Chaproniere, 1980;Quilty, 1984;Darragh, 1985;among others Papillatabairdia so far recorded from the Victorian Tertiary (Warne, 1986(Warne, , 1987.…”

Section: Materials and Geological Settingmentioning

confidence: 95%

NeonesideaandBairdoppilata(Ostracoda) from the Miocene of the Port Phillip and Western Port Basins, Victoria, Australia

Warne

1988

Alcheringa: An Australasian Journal of Palaeontology

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“…Historically, Australia has not been the site of extensive data collection on palaeoclimates, despite the fact that some of the earliest measurements of oxygen isotopes in fossil shell material were made on Australian materials (Lowenstam & Epstein 1954;Dorman & Gill 1959;Compston 1960;Dorman 1966). This lack of data has resulted, in part, because of the scarcity of appropriate materials for study.…”

Section: Geological Indicatorsmentioning

confidence: 99%

“…Palaeotemperatures from foliar physiognomy.Table 1Australian palaeotemperatures from oxygen isotopes Dorman and Gill (1959). included data on poorly dated material that are not included here.…”

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confidence: 99%

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Phanerozoic general circulation model results and quantitative climate data for Australia

Frakes¹,

Barron²

2001

Aust J Earth Sci

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Quantitative data bearing on Phanerozoic climates of Australia are summarised and comparisons are made with the predictions of atmospheric general circulation models over 12 time slices from the Silurian to the Miocene. Summaries of the model-derived mean temperature and precipitation conditions are given individually for each of four regions (southeast, northeast, southwest and northwest). Model results provide the means of estimating climate conditions in many cases, but there is fair agreement between the two approaches in most cases in which data are available. On model results, the southeast experienced winter freezing conditions from the Permian through until the middle Cretaceous and was consistently the coolest of the four regions, in part because of its proximity to the pole, but also because it was the site of elevated terrain throughout most of the Phanerozoic. It also tended to be among the wettest parts of Australia over this time and was subject to frequent winter storms. The northeast, in contrast, was often the warmest part of the continent, although strong seasonality and freezing winter temperatures were common during the Mesozoic and Palaeozoic. Strong seasonality (>30°C contrast between winter and summer) also apparently characterised most of the record for the southwest region, except for the Tertiary, part of the Jurassic, and the Early Palaeozoic. Together with the southeast, this region experienced the most intense effects of winter, especially in the Triassic. Strong seasonality also affected the northwest region through much of the Palaeozoic and Mesozoic and, interestingly, the highest summer temperatures on the continent are predicted for the southwest for most of the time slices studied. The models used today are imperfect but, nonetheless, offer a means of prediction and will perhaps stimulate the gathering of quantitative data in a continent where information is hard to come by and for which not much has yet been presented.

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Oxygen Isotope Paleotemperature Determinations of Australian Cainozoic Fossils

Cited by 26 publications

References 6 publications

Oxygen isotope studies on Jurassic and Cretaceous belemnites from New Zealand and their biogeographic significance

Oxygen isotope studies on Jurassic and Cretaceous belemnites from New Zealand and their biogeographic significance

NeonesideaandBairdoppilata(Ostracoda) from the Miocene of the Port Phillip and Western Port Basins, Victoria, Australia

Phanerozoic general circulation model results and quantitative climate data for Australia

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