Geology of the Pacific Ocean Guinea, and New Zealand lie outside the andesite line. Outside of the andesite line, volcanism is explosive; the Pacific Ring of Fire is the world's foremost belt of explosive volcanism. The Ring of Fire is named after the several hundred active volcanoes that sit above the various subduction zones. In 2009, the deepest undersea eruption ever recorded occurred at the West Mata submarine volcano, a mile beneath the ocean, close to the Tonga-Kermadec Trench, within the Ring of Fire; it was filmed by the US Jason robotic submersible which descended over . The Pacific Ocean is the only ocean which
Ecoregions in the Philippines Ecoregions in the Philippines The Philippine archipelago is one of the world's great reservoirs of biodiversity and endemism. The archipelago includes over 7000 islands, and a total land area of 300,780 km². The Philippines was never connected to mainland Asia via land bridges, so the flora and fauna of the islands had to cross ocean straits to reach the Philippines. The Philippines is part of the Indomalaya ecozone, and its flora and fauna is mostly derived from tropical Asia. Botanically, the Philippines are part of Malesia, a floristic province that includes the Malay Peninsula, Indonesia, and New Guinea. Most of