Risultati preliminari delle ricerche geomorfologiche e glaciologiche svolte nella seconda spedizione del P.N.R.A

• Main Authors: BARONI, CARLO, OROMBELLI G.
• Other Authors: Baroni, Carlo, Orombelli, G.
• Format: Article in Journal/Newspaper
• Language: Italian
• Published: 1988
• Subjects: Terra Nova Bay; Victoria Land; Glacial history; Antarctica; Edmonson Point; Ross Ice Shelf; Antarc*; Ice Shelf
• Online Access: http://hdl.handle.net/11568/14667

Glacial-geologicql observations have been carried on at Terra Nova Bay. Evidences of at least four glaciations have been observed: the oldest two are referred to the pre-Pleistocene. AI/long the coeste! belt the youngest glacial drift contains fragments of marine shells, supporting the hypothesis of the expansion of a grounded Ross Ice Shelf. Holocene glacier fluctuations have been studied and two minor neoglacial advances have been observed. Near Edmonson Point a glacier advance has been dated to about 1000 years BP . 14C ages have been obtained for Holocene raised beaches, ranging from 5770 + 60 to the present. A rate of 3 mm1year can be preliminarly estimated for the isostatic uplift during the last 4500 years. A geomorphological map at a scale 1:10.000 has been produced for the area surrounding the Italian station.