Caraga
On February 23, 1995, the Caraga region was created through the issue of Republic Act No. 7901 during the administration of President Fidel Ramos. The provinces of Agusan del Norte, Agusan del Sur and Surigao del Norte (of the former Northern Mindanao region) and Surigao del Sur (of the former Southern Mindanao region) were annexed as part of the newly-created region.
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.