(Mobil Philippines Exploration, Inc)






The sequence of Cenozoic pelagic foraminiferal markers in the Philippines has been found to be the same as in other marine Cenozoic basins throughout the world, especially in tropical and temperate zones. A Basic Zonation based on planktonic forms is presented for the Philippines. This "Basic Zonation" as established in Venezuela and Trinidad is considered to be more applicable to regional and intercontinental correlations than the stratigraphically confusing current use of geological time terms primarily based, in widely scattered areas, on rock units, larger foraminifera or mega-faunal evidence. Stratigraphic data is presented for two separate areas of Central Luzon, Philippines, to show the detailed studies necessary to establish the “Basic Zonation" for ideal correlation of time-rock units. Formation
status (Aksitero formation) is proposed for a sequence of deep marine limestone and shale (Upper Eocene to Oligocene) on the Upper Aksitero River that previously has been referred to as shallow shelf limestones (Lower Miocene-Aquitanian) Moriones formation.




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