Seismic stratigraphy of the Antarctic Peninsula Pacific margin: A record of Pliocene-Pleistocene ice volume and paleoclimate

摘要: Multichannel seismic profiles across the Pacific margin of Antarctic Peninsula show a series oblique progradational sequences. These sequences exhibit variety unusual characteristics that suggest they were produced by action ice sheets grounded out to shelf edge at times glacial maximum. Reflection events from deeper stratigraphic levels, followed down continental slope and onto rise, overlie ocean crust known age, showing least eight such have been deposited within past 6 m.y. Similar groundings probably occurred on most margins, but depositional record is particularly well preserved this because Pliocene-Pleistocene thermal subsidence. Neogene global sea-level fluctuations attributed changes in volume sheets. The are thought West ice-sheet directly. Further investigation these would assess relation between low-latitude change.