Hostname: page-component-78c5997874-mlc7c Total loading time: 0 Render date: 2024-11-05T16:20:29.611Z Has data issue: false hasContentIssue false

Palynology of the Marambio Group (Upper Cretaceous) of northern Humps Island

Published online by Cambridge University Press:  13 May 2004

Philip J.D. Dolding
Affiliation:
Centre for Palynological Studies, University of Sheffield, Mappin Street, Sheffield S1 3JD, UK Department of Geological Sciences, University College London, Gower Street, London WC1E 6BT, UK

Abstract

Palynological analyses of the Marambio Group sediments of Humps Island (Santa Marta and López de Bertodano formations) indicates that there is minor displacement across a prominent NW–SE trending normal fault which passes beneath the southern bluff. No major compositional differences were perceived between the palynomorph assemblages either side of the fault. A late Campanian age is suggested for both sequences, based on comparison with Australasian dinoflagellate cyst zonations. A new species of the dinoflagellate cyst Bourkidinium has been recorded from strata on either side of the fault. A significant number of recycled Permian and Early Cretaceous palynomorphs were recorded. Most are miospores and exhibit significant variation in preservational states, implying derivation from several sources. More thermally mature Permian gymnosperm pollen is most likely derived from the nearby Trinity Peninsula Group, exposed on the Antarctic Peninsula. The source of the relatively well preserved Permian pollen is problematic.

Type
Research Article
Copyright
© Antarctic Science Ltd 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)