Cenozoic Tectonic, Sedimentary and Glacial History of the Continental Shelf West Of Graham Land, Antarctic Peninsula

Till genesis at the bed of an Antarctic Peninsula palaeo-ice stream as indicated by micromorphological analysis

“…Pudsey et al 1994;Larter & Vanneste 1995;Bentley & Anderson 1998;Canals et al 2000Canals et al , 2002Anderson et al 2002;Domack et al 2005;Evans et al 2005;Heroy & Anderson 2005;Ó Cofaigh et al 2005a, b;Larter et al 2009). Ice-sheet models corroborate the idea that ice advanced to the shelf edge during this period (Nakada & Lambeck 1988;Denton et al 1991;Tushingham & Peltier 1991;Peltier 1994;Nakada et al 2000;Huybrechts 2002), and seismic reflection profiles also suggest that advance to the shelf edge occurred frequently throughout the Quaternary (Larter & Barker 1989;Bart & Anderson 1995;Larter et al 1997).…”

A new heat flux model for the Antarctic Peninsula incorporating spatially variable upper crustal radiogenic heat production

“…Following breakup (at ~162 Ma [ Pankhurst et al ., ]), the Peninsula returned to a continental volcanic arc setting [ Leat and Scarrow , ] with distinct periods of extensive intrusive magmatism [ Pankhurst and Rowley , ] and thick fore‐arc and turbidite sedimentation forming Alexander Island (Figure a) [ Tranter , ; Doubleday et al ., ]. Pacific subduction ceased progressively northward between ~60 and 6.5 Ma [ Larter et al ., ; McCarron and Larter , ], and magmatism waned until the production of postsubduction alkaline intraplate volcanism between 6.5 and 0.1 Ma [ Rex , ; Ringe , ] (Figure a).…”

Seismic stratigraphic record of the Amundsen Sea Embayment shelf from pre-glacial to recent times: Evidence for a dynamic West Antarctic ice sheet

“…The velocitydepth distribution is almost uniform along the east-west oriented profile. Compared to sedimentary rock velocities of other glaciated shelves (e.g., Cochrane et al, 1995;Larter et al, 1997), the relatively high velocities of the upper sediments are characteristic for overcompaction resulting from the pressure exercised by the repeated overriding by an ice sheet. A P-wave velocity of ca.…”