<P> The southern side is a divergent boundary with the Antarctic Plate forming the Pacific - Antarctic Ridge . </P> <P> The western side, the plate is bounded by the Okhotsk Plate at the Kuril - Kamchatka Trench and the Japan Trench, forms a convergent boundary by subducting under the Philippine Sea Plate creating the Mariana Trench, has a transform boundary with the Caroline Plate, and has a collision boundary with the North Bismarck Plate . </P> <P> In the south - west, the Pacific Plate has a complex but generally convergent boundary with the Indo - Australian Plate, subducting under it north of New Zealand forming the Tonga Trench and the Kermadec Trench . The Alpine Fault marks a transform boundary between the two plates, and further south the Indo - Australian Plate subducts under the Pacific Plate forming the Puysegur Trench . The southern part of Zealandia, which is to the east of this boundary, is the plate's largest block of continental crust . </P> <P> The northern side is a convergent boundary subducting under the North American Plate forming the Aleutian Trench and the corresponding Aleutian Islands . </P>

What type of boundary is found between the australian plate and the pacific plate