Possible evidence for Late Cretaceous off-axis volcanism in the outer James Ross Basin

• Published in: Antarctic Science
• Main Authors: Lomas, Simon A., Dingle, Richard V.
• Format: Article in Journal/Newspaper
• Language: English
• Published: Cambridge University Press (CUP) 1999
• Subjects: Geology; Ecology, Evolution, Behavior and Systematics; Oceanography; Hill Island; Snow Hill Island; Larsen Basin; Antarctic Science
• Online Access: http://dx.doi.org/10.1017/s0954102099000425; https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0954102099000425

A prominent volcaniclastic channel sandstone deposited by a landward-flowing sediment gravity flow is described from the Maastrichtian of Snow Hill Island in the northern Larsen Basin. The characteristics of this petrographically distinct event deposit appear to indicate a volcanic source to the east of Snow Hill Island, well away from the magmatic arc landmass which sourced the bulk of the Larsen Basin fill, suggesting minor off-axis intrabasinal volcanism in Maastrichtian to Paleogene times.