Torlesse Composite Terrane
The Torlesse Composite Terrane is a plate tectonic terrane forming part of the South Island of New Zealand. It contains the Rakaia, Aspiring and Pahau Terranes and the Esk Head Belt. Greywacke (or Torlesse Greywacke) is the dominant rock type of the composite terrane; argillite is less common and there are minor basalt occurrences. The Torlesse Composite Terrane is found east of the Alpine Fault in the Southern Alps of New Zealand. Its southern extent is a cryptic boundary with the Caples Terrane within the Haast Schists in Central Otago. It is named for the Torlesse Range in Canterbury.
| Torlesse Composite Terrane | |
|---|---|
| Stratigraphic range: Carboniferous-Cretaceous ~ | |
View of Torless Composite Terrane at Aoraki / Mount Cook | |
| Type | Terrane |
| Unit of | Austral Superprovince |
| Sub-units | Kaweka, Rakaia & Pahau Terranes, Esk Head Belt, Pahaoa & Clent Hills Groups |
| Underlies | Caples Terrane, Momotu, Waka & Haerenga Supergroups |
| Lithology | |
| Primary | Greywacke, schist, basalt |
| Location | |
| Region | Canterbury, Marlborough & Otago Regions |
| Country | New Zealand |
| Type section | |
| Named for | Torlesse Range |
Cross-section of New Zealand's stratigraphy | |
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