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  • John Kenneth Badillo

Geol 170 (Field Geology) fieldwork in Tablas Island, Romblon

The Geology 170 class conducted a field mapping in Tablas Island, Romblon last July 18 to 28, 2023. The fieldwork aims to enhance the skills and techniques of the students in geologic mapping and recognizing geologic features and structures in the field. The academic field activity was led by Dr. Gabriel Theophilus V. Valera, Dr. Betchaida D. Payot, Dr. Carla B. Dimalanta, and Dr. Leo T. Armada. A total of fifty-three (53) students participated and were divided into three (3) camps based in San Agustin, Odiongan, and Santa Fe.

The Geol 170 class was able to produce a geologic map of Tablas Island before going back to UP-NIGS for further analysis of the rock samples obtained from the field


The class was able to observe, investigate, and map out various rock exposures on the island after a week-long fieldwork. A complete suite of igneous, sedimentary, and metamorphic rocks were identified, as well as their relationships to each other. The fieldwork was concluded by a synthesis of the different observations made by each camp along with a geologic map of the island, which served as one of the final outputs of the class.


Outcrop photos of some of the formations observed on the island: foliated quartz-biotite schists of the Romblon metamorphics in Sante Fe (top left), serpentinized wehrlite of the Sibuyan Ophiolite Complex (SOC) in San Agustin (top right), the Calatrava dioritic intrusion in Alcantara (bottom left) and conglomerate-sandstone interbeds of the Anahao Formation in Odiongan (bottom right)


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