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CALCAREOUS NANNOFOSSIL STUDY OF THE KLONDYKE FORMATION
SECTION ALONG KM. POSTS 278-251, MARCOS HIGHWAY, BAGUIO CITY-
PUGO, LA UNION PROVINCE
 


Marietta M. de Leon, Emmanuel V. Tamesis and Priscilla J. Militante-Matias
National Institute of Geological Sciences, College of Science
University of the Philippines
Diliman, Quezon City


 

 

 

 

ABSTRACT


The Klondyke Formation is a thick clastic sequence exposed on the southwestern flank of
the Central Cordillera of Luzon. It consists of coarse elastic rocks of polymyctic conglomerates, conglomeratic sandstones and flow breccias interbedded with thin to medium beds of shales and siltstones. Various authors have assigned the rock unit an age range of Middle Miocene to Late Miocene based on foraminifera and stratigraphic position, the rock unit being underlain by the Middle Miocene Kennon Limestone and overlain by the Late Miocene Amlang Formation.

The present work attempts to further define the age of the Formation using calcareous nannofossils. A total of forty-one samples from twenty-seven sampling stations have been studied. Results indicate the calcareous nannofossil Zones NN5-NN10 (Martini, 1971) equivalent to Middle Miocene - Late Miocene age.
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