Introduction to Hallett Cove: Hallett Cove is one of the best known geological sites both in Australia and other parts of the world. It was made known by Professor Ralph Tate in 1875 when he first discovered the evidence of an ancient glaciation. Professor Ralph Tate’s discovery is now known all throughout the world. The conservation of the site to protect the glacial pavements commenced in 1960 with acquisition of a strip of coastline, named the Sandison Reserve, by the National Trust. Hallett Cove
Zealand has many volcanoes because it is on two separate tectonic plates, the Australian and the Indo-Pacific plates, that cut right through Wellington. In the North Island, the Indo-Pacific plate goes under the Australian plate. This forms a subduction zone as the denser crust goes under the less dense one. In the South island the opposite happens. Because of this plate arrangement, it creates many unusual land features in New Zealand such as, the Alpine Fault and the Puysegur Trench. New Zealand is also
plumes head reaches the lithosphere, it spreads into a mushroom shape that reaches roughly 500 to 1000 kilometers. These mushroom shapes are called diapirs. Most Hot spots volcanoes are Basaltic in nature, so they are less explosive than subduction zone volcanoes. III. What causes HotSpot Volcanoes? According to the still prevailing theory, most of it not all hotspots are believed to be the result of mantle plumes – bodies of warmer , and thus lighter material within that rises by