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
The Mines and Geosciences Bureau Regional Office No. XIII attended the National Summit for the Presentation of the Proposed Amendment of the Revised Implementing Rules and Regulations (RIRR) of Republic Act (RA) No. 7076 and 1st National Assembly of the Philippine National Coalition for Small-scale Miners on July 29-31, 2019 at the Provincial Capitol in the Municipality of Nabunturan, Province of Compostela Valley. The theme of the summit is Responsableng Pagmimina… Kaunlaran ng Bayan. It was spearheaded by BAN Toxics and International Labor Organization in coordination with the Department of Environment and Natural Resources (DENR)-Office of the Assistant Secretary for Mining Concerns. Asec. Nonita S. Caguioa, DENR Assistant Secretary for Mining Concerns, and Atty. Wilfredo G. Moncano, Acting Director of the Mines and Geosciences Bureau, graced the summit. MGB Central Office technical personnel; Ban Toxics staff; International Labor Organization representatives; small-scale mining focal persons from all MGB Regional Offices; and continue reading : MGB ROXIII attends small-scale mining summit in Compostela Valley