query: country mount dempo
supports: Dacite is an igneous, volcanic rock. It has an aphanitic to porphyritic texture and is intermediate in composition between andesite and rhyolite. The word dacite comes from Dacia, a province of the Roman Empire which lay between the Danube River and Carpathian Mountains (now modern Romania and Moldova) where the rock was first described. Lahat Regency is a regency of South Sumatra (or Sumatra Selatan) province, Indonesia. It covers a total area of 4,076.06 km and a population of 370,146 at the 2010 Census; the latest official estimate (as at January 2014) is 397,094. A stratovolcano, also known as a composite volcano, is a conical volcano built up by many layers (strata) of hardened lava, tephra, pumice, and volcanic ash. Unlike shield volcanoes, stratovolcanoes are characterized by a steep profile and periodic explosive eruptions and effusive eruptions, although some have collapsed craters called calderas. The lava flowing from stratovolcanoes typically cools and hardens before spreading far due to high viscosity. The magma forming this lava is often felsic, having high-to-intermediate levels of silica (as in rhyolite, dacite, or andesite), with lesser amounts of less-viscous mafic magma. Extensive felsic lava flows are uncommon, but have travelled as far as . South Sumatra Province (Jawi: ) is a province of Indonesia. It is located in the southern part of Sumatra Island, east of the Bukit Barisan Mountains. It spans and had a population of 7,450,394 at the 2010 Census; the latest official estimate is 10,675,862 (as at May 2015). The capital of the province is Palembang. A caldera is a large cauldron-like depression that forms following the evacuation of a magma chamber/reservoir. When large volumes of magma are erupted over a short time period, structural support for the crust above the magma chamber is lost. The ground surface then collapses downward into the partially emptied magma chamber, leaving a massive depression at the surface (from one to dozens of kilometers in diameter). Although sometimes described as a crater, the feature is actually a type of sinkhole, as it is formed through subsidence and collapse rather than an explosion or impact. Only seven known caldera-forming collapses have occurred since the start of the 20th century, most recently at Bárðarbunga volcano in Iceland. Indonesia (or ; Indonesian: ), officially the Republic of Indonesia, is a unitary sovereign state and transcontinental country located mainly in Southeast Asia with some territories in Oceania. Situated between the Indian and Pacific oceans, it is the world's largest island country, with more than seventeen thousand islands. At , Indonesia is the world's 14th-largest country in terms of land area and world's 7th-largest country in terms of combined sea and land area. It has an estimated population of over 260 million people and is the world's fourth most populous country, the most populous Austronesian nation, as well as the most populous Muslim-majority country. The world's most populous island of Java contains more than half of the country's population. Pagaralam (Jawi: ), is a city in South Sumatra, Indonesia. Before established as a definitive city, Pagaralam was an administrative city in Lahat Regency. It has an area of 633.66 km² and a population of 146,973 (2011). Sumatra is a large island in western Indonesia that is part of the Sunda Islands. It is the largest island that is entirely in Indonesia (two larger islands, Borneo and New Guinea, are shared between Indonesia and other countries) and the sixth-largest island in the world at 473,481 km (including adjacent islands such as the Riau Islands and Bangka Belitung Islands). Palembang is the second-largest city on Sumatra island after Medan and the capital city of the South Sumatra province in Indonesia. It is one of the oldest cities in the Malay Archipelago and Southeast Asia. Palembang is located on the Musi River banks on the east coast of southern Sumatra, with a land area of and a population of 1,708,413 people (2014). Palembang is the sixth-largest city in Indonesia after Jakarta, Surabaya, Bandung, Medan and Semarang. Its built-up ("or metro") area with Talang Kelapa and Rambutan was home to 1,620,429 inhabitants at the 2010 census. Mount Dempo is the highest stratovolcano in South Sumatra province that rises above Pasumah Plain near Pagar Alam and adjacent with Bengkulu Province . Seven craters are found around the summit . A 400 m wide lake is found at the northwest end of the crater complex . The most recent activity has been in 2009 . Historical activity has been confined to being small - to - moderate explosive activity that produced ashfall near the volcano .
candidates: iceland indonesia moldova roman empire romania world
answer: indonesia