North Palawan Block

The North Palawan block is considered to form the northeastern portion of a much larger area of block faulted and foundered pre-Tertiary continental material which extends throughout the southern part of the South China Sea Basin and includes the Spratly Islands and the Dangerous Grounds area off Borneo (Hamilton, 1979).

The evidence for the continental composition of the crust of this area is substantial and has been reviewed by Hamilton (1979) and Taylor & Hayes (1980) among others.

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.

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]: 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.