Townsend DB, Leonard GS, Conway CE, Eaves SR, Wilson CJN, (compilers) 2018. Geology of the Tongariro National Park area 1:60 000: digital vector data 2018. Lower Hutt, NZ: GNS Science. GNS Science geological map 4 1 DVD-ROM GNS Science geological map 4a.
This dataset contains a digital representation of a Geology of the Tongariro National Park area, suitable for use in specific Geographic Information Systems (GIS) software, specifically ArcGIS and QGIS. The GIS format allows for organising and attaching information (attributes) to geometrical representations of geological features in thematic layers. Geological units are represented as polygons with attributes describing, for example, stratigraphic affiliation, rock type and emplacement age. Faults are represented by line features with attributes describing accuracy, type, orientation, name, and age, magnitude and sense of movement. Structural measurements are point features with attributes describing, for example, the type of structure and its orientation. There are many other polygon, line and point layers representing additional geological elements. This dataset contains a PDF version of the geological map text that accompanied the published geological map and a JPEG version of the published map.
The Tongariro National Park (TNP) is the world's fifth oldest national park, and is designated as a dual UNESCO World Heritage Area. This map and text, produced through collaboration between GNS Science and the Department of Conservation, describes the geological history and structure of all the volcanoes in the park. It is aimed at interested members of the public and can also be used as a foundation for further studies. The volcanoes of the park are situated within the Taupo Volcanic Zone and Taupo Rift, and volcanic activity in the map area extends back at least one million years. Faulting and volcanism in the central North Island are driven ultimately by westward subduction of the Pacific Plate beneath the Australian Plate along the Hikurangi plate boundary zone. The predominantly andesitic magma erupted from the TNP volcanoes originates from partial melting of this subducted Pacific Plate under the North Island. Glaciers have been present on the volcanoes for much of their history, and the mountains are composed of both glacial deposits (till) and erupted materials. Lavas erupted close to ice commonly have distinctive textures and flow morphologies. Extensive ring plains, which contain approximately as much material as the mountains themselves, have built up by successive deposition from lahars, slope collapses, and material erupted onto the glaciers and conveyed away from its source. Since the retreat of the glaciers in the Holocene, and without the strong influence of ice, the volcanoes have built mostly symmetrical cones.
Please note this product comes in 2 formats - which can be ordered through this Webshop.
1. GNSGM4a - digital vector DVD (this one)
2. GNSGM4 - A comprehensive text with folded map (picture shown in thumb)