List of islands of Indonesia
The islands of Indonesia, also known as the Indonesian archipelago and formerly known as the Indian archipelago, may refer either to the islands comprising the nation-state of Indonesia or to the geographical groups which include its islands. According to the Indonesian Coordinating Ministry for Maritime Affairs, of 17,508 officially listed islands within the territory of the Republic of Indonesia, 16,056 island names have been verified by the United Nations Group of Experts on Geographical Names (UNGEGN) as of July 2017.
List of beaches in Indonesia
Indonesia is located in a region of abundant coral reefs known as the Coral Triangle as well as being the country with the most volcanoes in the world. Some beaches are derived from fluvial sands and gravels, others from cliff erosion. Coral reefs form white or yellow sanded beaches, while beach sediments derived from volcanic rocks are typically black or grey, such as those of northern Bali and southern Java. In the granitic zone of the Riau, Bangka and Belitung Islands, white quartz sands as well as granite boulders dominate. Sandy backshores are colonized by coastal vegetation, notably "Ipomoea pes-caprae" and "Spinifex littoreus", then coconut and casuarina trees. Coastal dunes are poorly developed in the humid tropics, but on the southern shores of Java and Sumatra, prograded beaches are backed by dunes, some of which carry woodland vegetation. Large deposits of lava and ash from volcanic eruptions may transport large quantities of pyroclastic sediment down to the coast, such as at Mount Merapi in southern Java and Mount Agung in Bali. The area within the Coral Triangle is associated with rich marine biodiversity. Beaches in the area, such as those that are important turtle nesting beaches, are protected by the government.