Karst subsidence and sinkhole collapse are some of the most dangerous hazards that can happen in an area underlain by carbonate lithology. The term karst describes a distinctive topography that indicates dissolution (also called chemical solution) of underlying soluble rocks by surface water or ground water. Although commonly associated with carbonate rocks (limestone and dolomite) other highly soluble rocks such as evaporites (gypsum and rock salt) can be sculpted into karst terrain (Alpha, T.R., et.al). The Mines and Geosciences Bureau Regional Office No. XIII conducted the Karst Subsidence Hazard Susceptibility Assessment and Ground Penetrating Radar (GPR) Survey on June 16 to August 13 in the Municipality of Tagbina, Surigao del Sur as its sole target for 2019. A team of geologists and geologic aides from the Geosciences Division conducted the said assessment and survey. For the first two weeks, the team focused on sinkhole and cave opening inventory in the continue reading : MGB ROXIII conducts Karst Subsidence Hazard Susceptibility Assessment and Ground Penetrating Radar Survey
