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
Islam in Indonesia economic and political consequences of the transmigration policy contributed to religious conflicts in Maluku, Central Sulawesi, and to a lesser extent in Papua. The Islamic schools and branches in Indonesia reflects the activity of Islamic doctrines and organizations operating in Indonesia. In terms of denomination, Indonesia is a majority Sunni country with minority of other sects such as Shia Islam and Ahmadiyya. In terms of Islamic schools of jursiprudence, Shafi'i school is dominant in Indonesia at large. Proliferation of Shafi’i school is considered owing to the Arab merchants from the southern Arabian Peninsula following this school of jurisprudence. Classical documentations