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The North Plateau is small and almost separated from the rest of the Manihiki Plateau. [4] The High Plateau is the largest part of Manihiki covering 400,000 km 2 (150,000 sq mi) above 4000 m. The second largest part is the Western Plateaus covering 250,000 km 2 (97,000 sq mi) above 5000 m and reaching 3,500–4,000 m (11,500–13,100 ft) below ...
The Ontong Java Plateau (OJP) is a massive oceanic plateau located in the southwestern Pacific Ocean, north of the Solomon Islands. The OJP was formed around 116 million years ago (Ma), [ 1 ] with a much smaller volcanic event around 90 Ma.
Manihiki is an atoll in the northern group of the Cook Islands known informally as the "Island of Pearls". It is located in the Northern Cook Island chain , approximately 1,299 kilometres (807 mi) north of the capital island of Rarotonga , making it one of the most remote inhabitations in the Pacific Ocean .
Phoenix Plate in context 180 million years ago well before the formation of the Wishbone scarp in what was its southern sector. The breakup of Gondwana, and resulting forces on the former Phoenix Plate as the large igneous province of the Ontong Java–Manihiki–Hikurangi plateau split up, with separation into what are now the Manihiki and Hikurangi plateaus, are likely key to the formation ...
It is located at about near 26°S [6] about midway between the two large oceanic plateau. The Manihiki Plateau is now 1,750 km (1,090 mi) to the north and to its south is the Hikurangi Plateau, 1,550 km (960 mi) away, near New Zealand. To the east the trough finishes at the Wishbone–East Manihiki scarp.
The Osbourn Trough, located at 25.5°S just north of the Louisville Ridge collision zone, is a 900 km (560 mi)-long extinct spreading ridge midway between two large oceanic plateaux north and south of the Tonga Trench respectively: Manihiki 1,750 km (1,090 mi) to the north and Hikurangi 1,550 km (960 mi) to the
An oceanic plateau is a large, relatively flat submarine region that rises well above the level of the ambient seabed. [50] While many oceanic plateaus are composed of continental crust , and often form a step interrupting the continental slope , some plateaus are undersea remnants of large igneous provinces .
The Hikurangi Plateau is an oceanic plateau in the South Pacific Ocean east of the North Island of New Zealand. It is part of a large igneous province (LIP) together with Manihiki and Ontong Java, now located 3,000 km (1,900 mi) and 3,500 km (2,200 mi) north of Hikurangi respectively. [2]