Geology of Indonesia active volcanoes formed Sumatra, Java, Bali, and Nusa Tenggara islands, most of which, particularly Java and Bali, emerged within the last 2–3 million years. The Pacific and Australian plate movements controlled the tectonics of the eastern portion of Indonesia. The tectonics processes in Indonesia formed major structures in Indonesia. The most prominent fault in the west of Indonesia is the Semangko Fault or the Great Sumatran Fault, a dextral strike-slip fault along Sumatra Island (about 1900 km). The formation of this fault zone is related to the subduction zone in the west of Sumatra. Palu-Koro fault is another major structural
Religion in Indonesia urbanised Balinese attracted to cities in Java, especially the Greater Jakarta area. Central Kalimantan has a 15.8% Hindu population. The Hindu variant of Kalimantan is identified as Hindu Kaharingan, although this native Dayak belief may be more correctly categorised as Animism, rather than Hinduism. Sikhs are typically registered as Hindus because the Indonesian government does not recognise Sikhism as a religion. Buddhism is the second oldest religion in Indonesia, arriving around the sixth century. The history of Buddhism in Indonesia is closely related to the history of Hinduism, as a number of empires based on Buddhist culture were established around