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

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 eas...

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Bibliographic Details
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
Description
Summary: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.

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