answers: Surigao del Sur
context: Region greatly owes its genesis to these complex natural processes operative during a long span of geologic time. Two (2) major geological events are noteworthy in influencing the high mineral endowment of the Region. These are: 1) the emplacement of Upper Cretaceous ophiolites over the eastern Philippines proto-arc during the Paleocene times and 2) island arc calc-alkalic magmatic and volcanic activity during the Miocene to Pliocene times coeval with the inception of the Philippine Trench – Philippine Fault system resulting from the oblique convergence of the Philippine Sea Plate with eastern Mindanao. The superposition of the younger island arc plutonic </s> of older metamorphic basement rocks with ophiolite suite of rocks later superposed by younger multiple stage island arc volcano-sedimentary sequences. The broad geomorphic configuration of the region is largely controlled by these tectonic processes of the past. Oldest rocks in the region are pre-Tertiary metamorphics and ophiolitic suite of rocks of Cretaceous age. Limited exposures of post-ophiolitic sedimentary rocks of Eocene age suggest dominant erosional processes from Paleocene to Eocene period. On the contrary, the Oligocene to Middle Miocene age is marked by thick accumulation of arc basaltic volcano-sedimentary sequence and turbidites later succeeded by mid-Miocene to Pliocene volcanic flows, </s> Mines and Geosciences Bureau Region 13 (Philippines) Caraga Region is located at northeastern part of Mindanao. It has five (5) provinces, namely: Dinagat Province, Surigao del Norte, Surigao del Sur, Agusan del Norte and Agusan del Sur. Caraga Region is now hosting several mining projects producing various mineral commodities particularly but not limited to gold, copper, chrome, nickel, iron and limestone for concrete cement production. This makes the Department of Environment and Natural Resources, Mines and Geosciences Bureau, Regional Office No. 13 with Office located in Surigao City plays important role in the region's economy, job generation, social and environmental
question: where can manganese be found in the philippines