Marble River

Marble River (also known as Marbel, Marbol River, Sulphur River ) is a river in the province of Cotabato. It is located at the foot of Mount Apo. The Marble River connects to the Kabacan River in North Cotabano. It is a tributary of the Pulangi River which empties into the Rio Grande de Mindanao in Cotabato City.

...
Wikipedia