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 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.

Details

Publication status:
Published
Author(s):
Authors: Lomas, Simon A., Dingle, Richard V.

Date:
1 January, 1999
Journal/Source:
Antarctic Science / 11
Page(s):
332-337
Digital Object Identifier (DOI):
https://doi.org/10.1017/S0954102099000425