The geology of the North Palawan Block includes terrane found on four islands: North Palawan, Romblon Island Group, Northeast Mindoro and Buruanga Peninsula. The stratigraphy found on Northern Palawan starts with the Middle Permian to Late Permian Bacuit Formation, a sequence of sandstone, altered tuff, calcareous sandstone, chert, and slate. It forms the base of the Malampaya Sound Group. Overlying is the Minilog Limestone, Liminangkong Formation, Late Triassic to Late Jurassic Coron Formation, which usually forms towering pinnacles, the Guinlo Formation, Paly Serpentinite, Caramay Schist, Conception Phyllite, Boayan Formation, Maytiguid Limestone, Late Oligocene-Early Miocene St. Paul Limestone, famous for the Underground River, the Kapoas Granite, Piedras Andesite, and then the Pliocene-Pleistocene Manguao Basalt.[2]
The Romblon Island Group stratigraphic column starts with the Paleozoic Romblon Metamorphic Complex, overlain by the Carabao Sandstone, Pacul Limestone, Sibuyan Ophiolitic Complex, Tablas Volcanic Complex, Calatrava Quartz Diorite, Bailan Limestone, Binoog Formation, Anahao Formation, Banton Volcanic Complex, and the Late Pliocene Peliw Formation.[2]: 266–267, 251–252
The Southwest Mindoro stratigraphic column starts with the Middle Jurassic-Early Jurassic Mansalay Formation, followed by the Agbahang Conglomerate, Caguray Formation, Bugtong Formation, Napisian Formation and Tangon Formation, Pocanil Formation, Punso Conglomerate, Famnoan Formation, Balanga Formation, and the Pleistocene Oreng Formation.[2]: 204, 231–232
The Buruanga Peninsula stratigraphic column starts with the Late Paleozoic Buruanga Metamorphic Complex, Patria Quartz Diorite, Fragante Formation, and the Pliocene-Pleistocene Libertad Formation.[2]: 65–66, 167
