Earth:Ilocos-Central Luzon Basin

Ilocos-Central Luzon Basin is a sedimentary basin and stratigraphic formation in the Ilocos Region and Central Luzon Region, Philippines .

Stratigraphic groupings

Ilocos

• Suyo Schist - greenschist, serpentinite, chert

• Ilocos Peridotite - serpentinized peridotite
• Bangui Formation - sandstone, conglomerate, mudstone; includes olistostrome
• Magabobbo Limestone - micritic limestone, calcarenites, minor argillites
• Bojeador Formation - conglomerate, graywacke, shale, limestone and associated volcanic flows and pyroclastics
• Pasaleng Quartz Diorite
• Dagot Limestone - reefal limestone, calcarenites, biosparites, minor calcareous volcanic conglomerate, particularly at the base and middle section
• Batac Formation - thinly bedded sandstone and shale; conglomerate
• Pasuquin Limestone - limestone with minor calcareous conglomerate, calcirudite, calcarenite
• Uplifted Coral Reefs

Luzon Central Valley

West side

• Aksitero Formation - Lower Bigbiga Limestone – micritic limestone with tuffaceous turbidites and minor chert; Upper Burgos Member – Limestone, tuffaceous sandstone, siltstone and mudstone. This is coequival with Bigbiga Limestone.
• Moriones Formation - interbedded sandstone, shale, conglomerate with minor limestone; identified members are Sansotero Limestone and Malo Pungatan Limestone
• Malinta Formation - Lower Pau Sandstone – sandstones with minor tuffaceous shale, conglomerates and lapilli tuff; Upper Aparri Gorge Sandstone – sandstones with shale stringers and conglomerate lenses
• Tarlac Formation - interbedded sandstone, shale, conglomerate
• Amlang Formation - turbiditic sandstones and shale with minor conglomerates
• Cataguintingan Formation - mainly tuffaceous sandstones, with interbeds of siltstones, shales and conglomerate and minor limestone lenses
• Bamban Formation - tuffaceous sandstone and lapilli tuff with basal conglomerate.
• Damortis Formation - sandstone, calcarenite, siltstone, limestone and marl

East side

• Barenas-Baito Formation
• Bayabas Formation
• Angat Formation
• Madlum Formation
• Makapilapil Formation
• Lambak Formation
• Tartaro Formation
• Guadalupe Formation

See also

List of stratigraphic formations in the Philippines