Antarctic Science

Table of Contents - 1999 - Volume 11, Issue 03  


Papers—Earth Sciences and Glaciology

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

Simon A. Lomas a1p1c1 and Richard V. Dingle a1p2
a1 British Antarctic Survey, Natural Environment Research Council, High Cross, Madingley Road, Cambridge CB3 0ET, UK

Article author query
lomas s   [PubMed][Google Scholar] 
dingle r   [PubMed][Google Scholar] 

Abstract

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.

(Received May 6 1998)
(Accepted March 24 1999)


Key Words: Larsen Basin; Maastrichtian; Marambio Group; off-axis volcanism.

Correspondence:
c1 s.lomas@abdn.ac.uk
p1 Department of Geology & Petroleum Geology, University of Aberdeen, Aberdeen AB24 3UE, UK
p2 Geological Institute, University of Copenhagen, Øster Voldgade 10, DK-1350 Copenhagen K, Denmark

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