Caraga
Caraga, officially known as the Caraga Administrative Region or simply Caraga Region and designated as Region XIII, is an administrative region in the Philippines occupying the northeastern section of the island of Mindanao. The Caraga Region was created through "Republic Act No. 7901" on February 23, 1995. The region comprises five provinces: Agusan del Norte, Agusan del Sur, Surigao del Norte, Surigao del Sur and Dinagat Islands; six cities: Bayugan, Bislig, Butuan, Cabadbaran, Surigao and Tandag; 67 municipalities and 1,311 barangays. Butuan is the regional administrative center.
Mines and Geosciences Bureau Region 13 (Philippines)
The rich mineral heritage of Caraga 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.