Molluscan stable isotope temperature estimates of the southwestern Ross Sea during the early oligocene and early miocene, CRP-2/2A and CRP-3, Victoria Land Basin, Antarctica

Stable isotope analyses of marine bivalve growth increment samples have been used to estimate early Oligocene (29.4 - 31.2) Ma and early Miocene (24.0 Ma) seafloor palaeotemperatures from the southwestern continental margin of the Ross Sea. Measured δ18O values average +2.5‰ in the early Miocene and...

Full description

Bibliographic Details
Main Authors: Lavelle, M., Fielding, C. R., Hall, M. A., Thomson, M. R. A.
Other Authors: Peter J Barrett, Carlo Alberto Ricci
Format: Article in Journal/Newspaper
Language:English
Published: Terra Antartica Publication 2001
Subjects:
growth rate
Miocene
Oligocene
paleoceanography
paleotemperature
stable isotope
260301 Geochronology and Isotope Geochemistry
C1
780104 Earth sciences
0499 Other Earth Sciences
McMurdo Sound
Ross Sea
Victoria Land
Antarc*
Antarctica
Online Access:https://espace.library.uq.edu.au/view/UQ:58901
Description
Summary:Stable isotope analyses of marine bivalve growth increment samples have been used to estimate early Oligocene (29.4 - 31.2) Ma and early Miocene (24.0 Ma) seafloor palaeotemperatures from the southwestern continental margin of the Ross Sea. Measured δ18O values average +2.5‰ in the early Miocene and range between +1.26 to +3.24‰ in the early Oligocene. The results show that palaeoceanographic conditions in McMurdo Sound during the mid-Cenozoic were significantly different from those of today. The minimum estimated spring through late summer seasonal temperature range was 3°C during the early Miocene and between 1 and 5°C during the early Oligocene. This compares to the equivalent modern day range of

Similar Items