Holocene glacial history and sea-level changes on James Ross Island, Antarctic Peninsula

Abstract

A reconstruction of deglaciation and associated sea‐level changes on northern James Ross Island, Antarctic Peninsula, based on lithostratigraphical and geomorphological studies, shows that the initial deglaciation of presently ice‐free areas occurred slightly before 7400 14C yr BP. Sea‐level in connection with the deglaciation was around 30 m a.s.l. A glacier readvance in Brandy Bay, of at least 7 km, with the initial 3 km over land, reached a position off the present coast at ca. 4600 yr BP. The culmination of the advance was of short duration, and by 4300 yr BP the coastal lowlands again were ice‐free. A distinct marine level at 16–18 m a.s.l. was contemporaneous with or slightly post‐dates the Brandy Bay advance, thus indicating the relative sea‐level around 4600–4500 yr BP. Our results from James Ross Island confirm that over large areas in this part of Antarctica the last deglaciation occurred late. © 1997 John Wiley & Sons, Ltd.

Permafrost and hydrogeology of quaternary deposits at Cape Welchness, Dundee Island (Antarctic Peninsula)

“…The remaining clastic deposits result from other periglacial and coastal processes but are limited and discontinuous. This observation is consistent with the proposal by Ingólfsson et al (1992) and Hjort et al (1997) for the James Ross Archipelago, suggesting that the Quaternary glaciogenic and marine deposits in Esperanza Bay would be relatively contemporaneous. Montes et al (2019) identified five geological units without formal names, designated with numbers 10–15 (Fig.…”

Timing of the neoglacial onset on the North-Eastern Antarctic Peninsula based on lacustrine archive from Lake Anónima, Vega Island

“…yrs BP as recorded in our study and analysed by Davies et al (2014). On top of that and with respect to LA record, the Davies et al (2014) attributes a glacial expansion in the northern part of James Ross Island to temperature rather than precipitation changes (as proposed by Hjort et al, 1997) and shows that temperature decrease is essential for glacial growth.…”

Palaeogeographical development of the Antarctic Peninsula during the late Cainozoic

“…The deglaciation of the northern part of JRI occurred slightly before 7.4 ka BP, sea level at this time being at -30 m above its present position (Hjort et al 1997). The most recent large-scale deglaciation in the area took place around 6-5 ka BP, thus confirming evidence from lake sediments in the AP region CIngolfsson et al 1992).…”