The Handler Formation: a New Unit of the Robertson Bay Group, Northern Victoria Land, Antarctica
- Garry D. Mckenzie
Published Online: 21 MAR 2013
Copyright 1987 by the American Geophysical Union.
Gondwana Six: Structure, Tectonics, and Geophysics
How to Cite
Wright, T. O. and Brodie, C. (1987) The Handler Formation: a New Unit of the Robertson Bay Group, Northern Victoria Land, Antarctica, in Gondwana Six: Structure, Tectonics, and Geophysics (ed G. D. Mckenzie), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM040p0025
- Published Online: 21 MAR 2013
- Published Print: 1 JAN 1987
Print ISBN: 9780875900643
Online ISBN: 9781118664483
The geology of northern Victoria Land provides a critical link between Australia and the rest of the Paleozoic margin of Gondwanaland. The Robertson Bay Group occupies a large area along the Ross Sea, and new information allows the stratigraphic subdivision of the group. The Handler Formation is defined as a sequence of quartzose sandstones, gray slate with minor red slate, and pebbly mudstone and megaconglomerate that constitutes the upper stratigraphic part of the Robertson Bay Group. Its lower contact is gradational with the lower part of the Robertson Bay Group, which remains undivided, and is distinguished from it primarily by the presence of red slate and pebbly mudstone beds. At the type section, Handler Ridge (72°30′S, 167°E), the top of the sequence is truncated by a thrust fault that places the Bowers Supergroup on top structurally. The age of the Handler Formation is constrained by the presence of fossils of youngest Cambrian/oldest Ordovician age in limestone olistoliths. This maximum age applies to the upper part of the Handler Formation; the age of the lower part and the underlying Robertson Bay Group is not well constrained paleontologically. The Handler Formation rocks are strongly folded and cleaved; total thickness is estimated at several thousand meters. The Handler Formation also occurs in a strip along the east side of the Victory Mountains for approximately 70 km north of Handler Ridge and in the Mirabito and Admiralty ranges.