@misc{lavelle2001sirm, author={Mark {Lavelle} and Christopher R {Fielding} and Michael A {Hall}}, title={{Stable isotope ratios measured on molluscan from the CRP sediment cores in the Ross Sea, Antarctica}}, year={2001}, doi={10.1594/PANGAEA.510768}, url={https://doi.org/10.1594/PANGAEA.510768}, note={Supplement to: Lavelle, M et al. (2001): 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. Terra Antartica, 8(4), 439-444, hdl:10013/epic.28228.d001}, abstract={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 palaeotemperature from the southwestern continental margin of the Ross Sea. Measured d18O values average +2.5 {\textperthousand} in the early Miocene and range between +1.26 to +3.24 {\textperthousand} 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{\textdegree}C during the early Miocene and between 1 and 5{\textdegree}C during the early Oligocene. This compares to the equivalent modern day range of <0.5{\textdegree}C within the sound. Absolute seawater temperatures at <100 m depth were of the order of 5 to 7{\textdegree}C during both time slices, compared to modern day values of -1.4 to - 1.9{\textdegree}C in the same area. The results are in broad agreement with early Oligocene Mg/Ca temperature estimates from deep Atlantic foraminifera as well as estimates from local terrestrial palynology and palaeobotany.}, type={data set}, publisher={PANGAEA} }