Malitep Formation


Lower member- limestone, biomicrite, biosparite

Stratigraphic relations

Unconformably overlies the Lepanto Formation in Bontoc area, and conformably overlain by the [[Sagada Formation]]


Bontoc area, Mountain Province; Licuan, Abra; Solsona area, Ilocos Norte; Kabugao area, Kalinga-Apayao


Late Eocene


Lower member – 750 m; Upper member – 1,700 m

Named by

Maleterre (1989)


Formations I and II of Licuan Group (MMAJ-JICA, 19

The Malitep Formation is a sequence of volcaniclastic strata exposed around Bontoc town, corresponding to the formations (I and II) of Licuan Group by MMAJ-JICA (1980) and BMG (1981).  This formation rests unconformably over the Lepanto Metavolcanics and is conformably overlain by the Sagada Formation.  As described by Maleterre (1989), it is divided into a lower member made up mainly of dacitic flows, tuffs and breccias having a thickness of about 750 m, and an upper member of volcanic conglomerate, sandstones and tuffs, with a total thickness of around 1,700 m along the Malitep and Sabangan rivers.  The breccias of the lower member contain clasts of dacite, spilite, schist and limestone.

The Licuan I formation exposed along Layacan River west of Besao is composed chiefly of basalt, basaltic andesite and pyroclastic rocks intercalated with 2-m thick limestone.  Formation II is made up of andesite lava and andesitic pyroclastic rocks with intercalated limestone lenses, reaching up to 50 m thick along Malibcong River in Abra.  It was mapped by MMAJ-JICA (1980) in Licuan area in Abra, Solsona area in IlocosNorte and Kabugao area in Kalinga-Apayao.  The Licuan II formation, considered equivalent to the Malitep Formation, also contains limestone lenses up to 50 m thick in the Abra area (MMAJ-JICA, 1980).

A limestone clast from a conglomerate of the Malitep Formation was dated Late Eocene (Maleterre, 1989).  This is consistent with the Late Eocene dating by MMAJ-JICA (1980) of a limestone lens in a formation of Licuan Group in Bontoc area.  MMAJ-JICA (1980) also reports that a limestone clast in tuff breccia in Abra area was dated Eocene.  The age of the formation as a whole is therefore pegged at Late Eocene.

Formation sequence

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