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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