New Zealand Journal of Geology and Geophysics abstracts

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Cambrian trilobites from Northern Victoria Land, Antarctica, and their stratigraphic implications

R. A. COOPER¹
J. B. JAGO²
J. G. BEGG¹

1Institute of Geological & Nuclear Sciences
P.O. Box 30368
Lower Hutt, New Zealand

2Department of Applied Geology
Gartrell School of Mining, Metallurgy and Applied
Geology
University of South Australia
The Levels, South Australia 5095

Abstract  Fifty-four trilobite taxa from 15 new localities in the Bowers Terrane of Northern Victoria Land, including the first fossils from Molar Formation, are described. The fossils indicate an age range from late Middle Cambrian (Boomerangian or older) to mid Late Cambrian (late Idamean). At Reilly Ridge, the Spurs Formation crops out in a number of fault-bounded slices; the new fossils indicate marked lateral facies contrasts between slices and suggest considerable lateral displacement along the bounding faults. At Houliston Glacier, trilobites of Mindyallan age in Molar Formation imply that the boundary between the Molar and Spurs Formations is strongly time transgressive. New species described in this paper are Reillopleura braddocki gen. et sp. nov. and Notoaphelaspis horizontalis sp. nov. Faunal affinities are mainly with the Ellsworth Mountains (West Antarctica), western Queensland, and China.

Keywords  Cambrian; trilobites; Bowers Terrane; Molar Formation; Spurs Formation; Reilly Ridge; Houliston Glacier; lateral facies change; Reillopleura braddocki gen. et sp. nov.; Notoaphelaspis horizontalis sp. nov.; new biostratigraphic names

New Zealand Journal of Geology and Geophysics, 1996, Vol. 39: 363-387

0028-8306/96/3903-0363 $2.50/0 (c) The Royal Society of New Zealand 1996

PDF file of entire paper: medium quality (6528K); (scanned from paper original: notes about this process)

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