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CHLORITE AND ZEOLITE ALTERATIONS IN THE "UPPER ZIGZAG" FORMATION ALONG BUED RIVER, TUBA, BENGUET

ROLANDO E. PEA

 

 

 

 

INTRODUCTION



Sandstones and tuffs of the "Upper Zigzag" Formation in the Bued River section contain considerable alteration minerals, the more common and persistent of which are zeolites and chlorite. The zeolites are mostly allotrimorphic-granular, but in places, they show fibrous, spherulitic and idiomorphic forms. Chlorite usually occurs as interstitial material and occasionally show spherulitic structure.

 

 

 

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