This is the largest living kauri tree, "Tane Mahuta" 

This picture and the following pictures were taken inside the Kauri Museum at Matakohe N.Z. The kauri tree that this slab came from was struck by lightning, which killed the tree.

The next picture shows the diameter of the largest known kauri trees. The slab handing on the wall in the middle was taken from the same tree in the picture above.

The following 2 pictures are kauri gum. The gum was collected mainly to make varnish. Photo taken at Kauri Museum at Matakohe N.Z.

Swamp kauri found in the northen section of the North Island. They are finding kauri logs buried just under the ground in some of the swamp areas. This swamp kauri wood is the only kauri wood available. All living kauri trees are a protected species. The New Zealand government has made it illegal for any living kauri tree to be cut down.
There are 3 main time frames for the swamp kauri wood. Carbon dating from 3,500 years, 30,000 years and the oldest at 45,000 years.

Here is a video showing an ancient kauri tree being unearthed!