Antarctic ostracod Complete.pdf (1.34 MB)
Exceptionally preserved lacustrine ostracods from the Middle Miocene of Antarctica: implications for high latitude palaeoenvironment at 77° south
journal contribution
posted on 2010-06-21, 13:48 authored by Mark Williams, David J. Siveter, Allan C. Ashworth, Philip R. Wilby, David J. Horne, Adam R. Lewis, David R. MarchantA newly discovered Konservat-Lagerstätte from the Middle Miocene of the western Olympus Range, Dry Valleys, Antarctica, yields cypridoidean ostracods complete with preserved body and appendages. This is the first record of 3-dimensionally fossilized animal soft tissues from the continent. The ostracods are preserved in goethite, secondary after pyrite, representing a novel mode of exceptional preservation. They signal a high latitude (>77°S) lake setting (Palaeolake Boreas) viable for benthic animal colonisation prior to 14 Ma. Their presence supports the notion of warmer, tundra-like environmental conditions persisting in the Dry Valleys until the Middle Miocene.