The Cenozoic plate tectonics of the Indonesian region have generated a complex assemblage of micro-continental blocks and marginal ocean basins surrounded by extensional margins, subduction zones and major transcurrent faults. The island of Borneo and the Kutai basin are located on the Sunda micro-plate, which is bounded to the north and west by the Eurasian plate, to the south by the Indo-Australian plate and to the west by the Philippine and Pacific oceanic plates. In the Cenozoic, the Indo-Australian plate has been moving north and subducting under Eurasia. The collision of the Indian continent with Eurasia halted subduction and uplifted the Himalayas. In between the continents of India and Australia, the oceanic crust is still subducting under the Sunda plate, forming the Sunda trench and Sunda Arc. Australia and Australian derived micro-plates collided with the Sunda plate and Pacific plate in the Pliocene, creating a complex of subduction zones and island arcs. The Philippine plate has been obliquely subducting the Sunda plate for most of the Cenozoic.