Norfolk Ridge
| Norfolk Ridge | |
|---|---|
| Stratigraphic range: | |
The Norfolk Ridge in relation to other Pacific Ocean seafloor features. The Zealandia continental margin is shown in black. | |
| Lithology | |
| Primary | Mesozoic basement |
| Other | Limestone, mudstone with andesite, trachyandesite, shoshonite lavas |
| Location | |
| Coordinates | 27°00′S 167°30′E / 27°S 167.5°E |
| Region | South Pacific |
| Extent | 1,500 km (930 mi) |
| Type section | |
| Named for | Norfolk Island |
| Year defined | 2023 |
| Region | South Pacific Ocean |
The Norfolk Ridge (Norfolk Island Ridge, Norfolk Rise, South New Caledonia Ridge) is a long submarine ridge running between New Caledonia and New Zealand, about 1,300 km (810 mi) off the east-coast of Australia.
It is part of a complex region of ridges between the oceanic crust of the Pacific plate and the continental crust of Australia. Little has been known about the Norfolk Ridge; however, it generally lies about 1,000–1,200 m (3,300–3,900 ft) below sea level and consists of Late Cretaceous continental crust. It is part of Zealandia, a continent that was submerged 60-85 million years ago.