Titahi Bay Fossil Tree, Photo J.Thomson @ GNS.Science
The fossil forest floor on the beach has been dated at about 100 000 years old, and was living during the last warm inter-glacial period. It actually extends most of the way along the beach, but is usually buried by sand except for a few tree stumps at the very south end of the beach. Sometimes the fossil tree stumps disappear almost entirely under sand. On rare occasions after big storms, the trees can be exposed over a relatively large area. In the middle of the beach, a black surface can be exposed. This black material is mud-rich soil (paleosol) loaded with masses of black root material.
The wave-cut platform at the end of the beach is a classic erosion feature on a rocky coast. It is a good exposure of the bedrock that underlies the Wellington region.