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
Cultural properties of Indonesia items considered cultural properties are contained. Several examples follow below: Cultural properties of Indonesia Cultural properties of Indonesia are those items defined by Indonesian law as of "important value for history, science, and culture", and include both man-made artefacts and natural objects. The cultural properties number more than 8,000 and include ancient Hindu and Buddhist temples, mosques, historic colonial buildings, forts, art galleries, national parks and beaches. A number of the sites are World Heritage Sites. The current regime for the protection and promotion of the cultural properties of Indonesia () is governed by the Act of the Republic of