Effect of sampling interval on the resolution of oxygen isotopic paleotemperature trends—an example from the New Zealand Early Miocene
- 1 January 1982
- journal article
- research article
- Published by Taylor & Francis in New Zealand Journal of Geology and Geophysics
- Vol. 25 (1), 77-81
- https://doi.org/10.1080/00288306.1982.10422506
Abstract
Oxygen isotopic analyses of closely spaced (~35000 year) samples of the planktic foraminifera Globigerina (G.) woodi Jenkins from a 15 m section of massive mudstone within the Early Miocene Taumatamaire Formation, South Auckland, reveal a significant cyclical fluctuation in their isotopie composition of 0.8%c in about 300000 years, as well as possible superimposed smaller oscillations of 0.3%c in about 80000 years. If the isotopie values are primarily temperature related, then these short-term oscillations correspond to temperature changes of 3.5°C and 1.5°C respectively and are of as great a magnitude as the single isotopie temperature fluctuation previously reported for the entire 11 m.y. period covering the Waitakian to Altonian (latest Oligocene to Early Miocene inclusive) Stages in New Zealand. Successful definition of such short-term, cyclical isotopie fluctuations requires a sampling interval of considerably less than 100000 years.Keywords
This publication has 24 references indexed in Scilit:
- Palaeoceanographic change in the Pacific at the Eocene–Oligocene boundaryNature, 1980
- Climatic changes, magnetic intensity variations and fluctuations of the eccentricity of the earth's orbit during the past 2,000,000 years and a mechanism which may be responsible for the relationshipEarth and Planetary Science Letters, 1978
- Climate response to astronomical forcingEarth and Planetary Science Letters, 1978
- Long-Term Variations of Caloric Insolation Resulting from the Earth's Orbital ElementsQuaternary Research, 1978
- A Model for Northern Hemisphere Continental Ice Sheet VariationQuaternary Research, 1976
- The Brunhes Epoch: Isotopic Paleotemperatures and GeochronologyScience, 1974
- Oxygen Isotope and Palaeomagnetic Stratigraphy of Equatorial Pacific Core V28-238: Oxygen Isotope Temperatures and Ice Volumes on a 105 Year and 106 Year ScaleQuaternary Research, 1973
- Lower Miocene StagesNew Zealand Journal of Geology and Geophysics, 1972
- Insolation changes, ice volumes, and the O18 record in deep‐sea coresReviews of Geophysics, 1970
- Australian Tertiary PaleotemperaturesThe Journal of Geology, 1966