Antarctic Peninsular cryosphere: Early Oligocene ( c. 30 Ma) initiation and a revised glacial chronology
- 16 May 1998
- journal article
- Published by Geological Society of London in Journal of the Geological Society
- Vol. 155 (3) , 433-437
- https://doi.org/10.1144/gsjgs.155.3.0433
Abstract
Strontium isotope stratigraphy provides a chronology for Cenozoic cryogenic strata in the northern Antarctic Peninsula and allows an assessment of diachronism in onset of glacial conditions between East and West Antarctica. The earliest observed event on the Antarctic Peninsula was late Early Oligocene (29.8 ± 0.6 Ma) (at least c. 4 Ma later than in East Antarctica), with a second in the early Early Miocene (22.6 ± 0.4 Ma). Both glacials and intervening interglacial were continent-wide phenomena. Two late Neogene glaciations are distinguished: early Late Miocene (9.9 ± 0.97 Ma) (Hobbs Glacier/Jones Mountains) and latest Miocene (Alexander Island). A further late Neogene glacial deposit (Weddell Formation) can be constrained only as < c. 10 Ma.Keywords
This publication has 20 references indexed in Scilit:
- Oligocene and Pliocene interglacial events in the Antarctic Peninsula dated using strontium isotope stratigraphyJournal of the Geological Society, 1997
- Eocene-Oligocene transition in the Southern Ocean: History of water mass circulation and biological productivityGeology, 1996
- Southernmost South America‐Antarctic Peninsula relative plate motions since 84 Ma: Implications for the tectonic evolution of the Scotia Arc regionJournal of Geophysical Research, 1995
- Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and CenozoicJournal of Geophysical Research, 1995
- High-Resolution Study of Neogene Ice-Rafted Debris, Site 751, Southern Kerguelen PlateauPublished by International Ocean Discovery Program (IODP) ,1992
- Lower Oligocene Ice-Rafted Debris on the Kerguelen Plateau: Evidence for East Antarctic Continental GlaciationPublished by International Ocean Discovery Program (IODP) ,1992
- Late Miocene to Holocene Glacial History of East Antarctica as Revealed by Sediments from Sites 745 and 746Published by International Ocean Discovery Program (IODP) ,1991
- Synthesis of Oxygen and Carbon Isotopic Results from Site 704: Implications for Major Climatic-Geochemical Transitions during the Late NeogenePublished by International Ocean Discovery Program (IODP) ,1991
- Oligocene to Quaternary Sedimentation Processes on the Antarctic Continental Margin|ODP Leg 113|Site 693Published by International Ocean Discovery Program (IODP) ,1990
- Late Cretaceous-early Tertiary floras of King George Island, West Antarctica: their stratigraphic distribution and palaeoclimatic significanceGeological Society, London, Special Publications, 1989