Tākaka terrane
| Tākaka terrane | |
|---|---|
| Stratigraphic range: Cambrian-Devonian ~ | |
| Type | Terrane |
| Unit of | Austral Superprovince Western Province |
| Sub-units | Haupiri, Devil River Volcanics, Mount Patriarch, Mount Arthur, Ellis, Edgecumbe, Cameron & Pegasus Groups |
| Underlies | Tuhua Intrusive, Waka & Haerenga Supergroups |
| Lithology | |
| Primary | Sandstone, marble, basalt |
| Location | |
| Coordinates | 41°06′S 172°48′E / 41.1°S 172.8°E |
| Region | Tasman District |
| Country | New Zealand |
| Type section | |
| Named for | Tākaka Hill |
Cross-section of New Zealand's stratigraphy | |
The Tākaka terrane is a Paleozoic terrane that outcrops in the South Island of New Zealand. It is most extensively exposed within the Kahurangi National Park in the Tasman District. The terrane is mostly made up of marble and volcanic rocks, but is highly variable in composition. It ranges in age from mid-Cambrian to Devonian time (510–400 Ma), including New Zealand's oldest rocks, which are found in the Cobb Valley in north-west Nelson. The Cobb Valley is also the location of "Trilobite Rock", a glacial dropstone made from the moulted exoskeletons of trilobites. Asbestos was mined in the Cobb Valley from the Tākaka Terrene between the late 1880s and 1917. The Tākaka terrane is highly deformed and has been intruded by many batholiths.