St. Arnaud Range, Nelson Lakes National Park, New Zealand:

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photos courtesy Charlie Wilson, April 2001

Initial view is to the northeast, down the Wairau Fault and the Wairau River Valley. Raglan Range is beyond the Wairau River, extending off to the right to the south. To the left is the Red Hill area at the western end of the Richmond Ranges. Farther to the left you can look down the basin towards Tasman Bay, then to the westnorthwest over the St. Arnaud area are the various ranges (Lyall Range, Tasman Range) on the northwestern penninsula of the South Island. Farther westsouthwest is Pourangahau/Mt Robert at the north end of the Travers Range, which then extends to the south over Lake Rotoiti. The Wairau Fault continues just to the right of Pourangahau/Mt Robert and through the penninsula into the north end of Lake Rotoiti.

South of the fault here are mainly Mesozoic marine rocks (Torlesse sediments); to the north are a collection of terranes representing the old edge of Australia ranging from an ophiolitic complex in the Red Hills area to early Paleozoic continental crust off to the west. The rocks to the north next appear near Fiordland and the Otago Hills towards the southern end of the South Island.


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C. H. Jones | CIRES | Dept. of Geological Sciences | Univ. of Colorado at Boulder

Last modified at May 17, 2022 10:18 AM