List of stratigraphic formations in the Philippines From Wikipedia, the free encyclopedia The list of well-known geologic formations in the Philippines.[1] Ilocos-Central Luzon Basin Luzon Central Cordillera Cagayan Valley Basin Northern Sierra Madre Zambales Range Southern Sierra Madre Southwest Luzon Uplands Southeast Luzon Basin Southeast Luzon Arc (Recent) Southeast Luzon Arc (Ancient) North Palawan Block South Palawan Block Antique Range Iloilo Basin Negros Arc (Ancient) Negros Arc (Recent) Visayan Sea Basin Samar Block Leyte Central Highlands Leyte Gulfs Sulu-Zamboanga Arc Central Mindanao Arc Agusan-Davao Basin Mindanao Pacific Cordillera Daguma Range Cotabato Basin Saranggani Block Pujada Block South China Sea Basin Sulu Sea Basin Celebes Sea Basin Philippine Sea Basin References ↑ Lexicon of Philippine Stratigraphy, 2008, Peña Related Articles