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Mount Sunda
Mount Sunda was an ancient volcano that once stood in Priangan highlands in today's West Java province, Java island, Indonesia. The Sunda volcano existed during the Pleistocene age before a violent Plinian eruption caused its summit to collapse. The volcano formed the northern ridge of the Bandung Basin. The ancient volcano is the predecessor of today's Tangkuban Perahu, Burangrang, and Bukit Tunggul volcanoes. The Sunda volcano was a stratovolcano and is estimated to have reached up to 3,000–4,000 metres (9,850–13,100 ft) above sea level during the Pleistocene age. During this age, it was one of the highest volcanoes in Java. Eruptions Two large-scale eruptions took place; the first formed the northern ridge of the Bandung basin, and the other (est. 55,000 Before the Present) blocked the Citarum River, turning the basin into a lake known as the " Great Prehistoric Lake of Bandung". Naming The mountain's name comes from the Sanskrit "Chuda" which means white, refe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcano
A volcano is commonly defined as a vent or fissure in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and because most of Earth's plate boundaries are underwater, most volcanoes are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes resulting from divergent tectonic activity are usually non-explosive whereas those resulting from convergent tectonic activity cause violent eruptions."Mid-ocean ridge tectonics, volcanism and geomorphology." Geology 26, no. 455 (2001): 458. https://macdonald.faculty.geol.ucsb.edu/papers/Macdonald%20Mid-Ocean%20Ridge%20Tectonics.pdf Volcanoes can also form where there is str ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bandung Lake
Lake Bandung () was a prehistoric lake located in and around the city of Bandung, Parahyangan highlands, West Java, Indonesia. believed to exist between 126,000 and 20,000 BCE in the Pleistocene due to the violent eruption of Mount Sunda that blocked the Citarum River, causing the lowlands to begin to be inundated with water, eventually forming a lake. Today, the lake had dried out and revealed the bottom of a geological basin known as the Bandung basin. It is mostly filled with habitation and industrial areas, paddy fields and orchards. It is believed that this low-lying basin has caused the southern suburbs of Bandung to suffer seasonal flooding during the rainy season, as the Citarum river that formed the lowermost backbone of the basin overwhelms and swells. Formation Miocene period During the Miocene period, the northern Bandung area was a sea, as evidenced by coral fossils that formed a coral reef along the Rajamandala ridge. Today, these reefs are limestone and mined a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Calderas Of Indonesia
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcanic eruption. An eruption that ejects large volumes of magma over a short period of time can cause significant detriment to the structural integrity of such a chamber, greatly diminishing its capacity to support its own roof and any substrate or rock resting above. The ground surface then collapses into the emptied or partially emptied magma chamber, leaving a large 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. Compared to the thousands of volcanic eruptions that occur over the course of a century, the formation of a caldera is a rare event, occurring only a few times within a given window of 100 years. Only eight caldera-forming collapses are known to have occurred between ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Subduction Volcanoes
Subduction is a geological process in which the oceanic lithosphere and some continental lithosphere is recycled into the Earth's mantle at the convergent boundaries between tectonic plates. Where one tectonic plate converges with a second plate, the heavier plate dives beneath the other and sinks into the mantle. A region where this process occurs is known as a subduction zone, and its surface expression is known as an arc-trench complex. The process of subduction has created most of the Earth's continental crust. Rates of subduction are typically measured in centimeters per year, with rates of convergence as high as 11 cm/year. Subduction is possible because the cold and rigid oceanic lithosphere is slightly denser than the underlying asthenosphere, the hot, ductile layer in the upper mantle. Once initiated, stable subduction is driven mostly by the negative buoyancy of the dense subducting lithosphere. The down-going slab sinks into the mantle largely under its own weig ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Batur
Mount Batur ''(Gunung Batur)'' is an active volcano located at the center of two concentric calderas northwest of Mount Agung on the island of Bali, Indonesia. The southeast side of the larger 10×13 km caldera contains a caldera lake. Both the larger caldera, and a smaller 7.5 km caldera were formed by a collapse of the magma chamber, the first larger collapse taking place about 29,300 years ago, and the second inner caldera collapsing about 20,150 years ago. Another estimate of the inner caldera's formation date, formed during the emplacement of the Bali (or Ubud) ignimbrite, has been dated at about 23,670 and 28,500 years ago. The first documented eruption was in 1804 and the most recent was in 2000. Active volcano and Lake Batur in the caldera The eruption that brought this volcano to be visible above the ocean is one of the most forceful on the Earth. This volcano is marked by a collapsed top, called a caldera. The caldera contains an active, 700-metre-tall st ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mount Tambora
Mount Tambora, or Tomboro, is an active stratovolcano in West Nusa Tenggara, Indonesia. Located on Sumbawa in the Lesser Sunda Islands, it was formed by the active subduction zones beneath it. Before the 1815 eruption, its elevation reached more than high, making it one of the tallest peaks in the Indonesian archipelago. Tambora underwent a series of violent eruptions, beginning on 5 April 1815, and culminating in the largest eruption in recorded human history and the largest of the Holocene (10,000 years ago to present). The magma chamber under Tambora had been drained by previous eruptions and lay dormant for several centuries as it refilled. Volcanic activity reached a peak that year, culminating in an explosive eruption that was heard on Sumatra island, more than away and possibly over away in Thailand and Laos. Heavy volcanic ash rains were observed as far away as Borneo, Sulawesi, Java, and Maluku islands, and the maximum elevation of Tambora was reduced from about ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lake Toba
Lake Toba (, Toba Batak: ᯖᯀᯬ ᯖᯬᯅ; romanized: ''Tao Toba'') is a large natural lake in North Sumatra, Indonesia, occupying the caldera of the Toba supervolcano. The lake is located in the middle of the northern part of the island of Sumatra, with a surface elevation of about , the lake stretches from to . The lake is about long, wide, and up to deep. It is the largest lake in Indonesia and the largest volcanic lake in the world. Toba Caldera is one of twenty geoparks in Indonesia, and was recognised in July 2020 as one of the UNESCO Global Geoparks. Lake Toba is the site of a supervolcanic eruption estimated at VEI 8 that occurred 69,000 to 77,000 years ago, representing a climate-changing event. Recent advances in dating methods suggest a more accurate eruption date of 74,000 years ago. It is the largest-known explosive eruption on Earth in the last 25 million years. According to the Toba catastrophe theory, the eruption had global consequences for human po ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sundanese People
The Sundanese (; ) are an Austronesian people, Austronesian ethnic group native to Java in Indonesia, primarily West Java. They number approximately 42 million and form Ethnic groups in Indonesia, Indonesia's second most populous ethnic group. They speak the Sundanese language, which is part of the Austronesian languages. The western area of the island of Java, namely the provinces of West Java, Banten, and Jakarta, as well as the westernmost part of Central Java, is called by the Sundanese people ''Tatar Sunda'' or ''Pasundan'' (meaning Sundanese land). Sundanese migrants can also be found in Lampung, South Sumatra, and, to a lesser extent, in Central Java and East Java. The Sundanese people can also be found on several other islands in Indonesia such as Sumatra, Kalimantan, Sulawesi, Bali and Papua (province), Papua. Origins Migration theories The Sundanese are of Austronesian peoples, Austronesian origins and are thought to have originated in Taiwan. They migrated through th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sumatra
Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi.2), including adjacent islands such as the Simeulue Island, Simeulue, Nias Island, Nias, Mentawai Islands, Mentawai, Enggano Island, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago. Sumatra is an elongated landmass spanning a diagonal northwest–southeast axis. The Indian Ocean borders the northwest, west, and southwest coasts of Sumatra, with the island chain of Simeulue, Nias, Mentawai Islands, Mentawai, and Enggano off the western coast. In the northeast, the narrow Strait of Malacca separates the island from the Malay Peninsula, which is an extension of the Eurasian continent. In the southeast, the narrow Sunda Strait, containing the Krakatoa archipelago, separates Sumatra from Java. The northern tip of Sumatra is near ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Indian People
Indian people or Indians are the Indian nationality law, citizens and nationals of the India, Republic of India or people who trace their ancestry to India. While the demonym "Indian" applies to people originating from the present-day India, it was also used as the identifying term for people originating from what is now Bangladeshi diaspora, Bangladesh and Pakistani diaspora, Pakistan prior to the Partition of India in 1947. In 2022, the population of India stood at 1.4 billion people, of various Indian ethnic groups, ethnic groups. According to United Nations forecasts, India overtook China as the world's List of countries and dependencies by population, most populous country by the end of April 2023, containing 17.50 percent of the global population. In addition to the Indian population, the Non-resident Indian and Overseas Citizen of India, Indian overseas diaspora also boasts large numbers, particularly in former British Empire, British colonies due to the historical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacier
A glacier (; or ) is a persistent body of dense ice, a form of rock, that is constantly moving downhill under its own weight. A glacier forms where the accumulation of snow exceeds its ablation over many years, often centuries. It acquires distinguishing features, such as crevasses and seracs, as it slowly flows and deforms under stresses induced by its weight. As it moves, it abrades rock and debris from its substrate to create landforms such as cirques, moraines, or fjords. Although a glacier may flow into a body of water, it forms only on land“Glacier, N., Pronunciation.” Oxford English Dictionary, Oxford UP, June 2024, https://doi.org/10.1093/OED/7553486115. Accessed 25 Jan. 2025. and is distinct from the much thinner sea ice and lake ice that form on the surface of bodies of water. On Earth, 99% of glacial ice is contained within vast ice sheets (also known as "continental glaciers") in the polar regions, but glaciers may be found in mountain ranges on ever ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sanskrit
Sanskrit (; stem form ; nominal singular , ,) is a classical language belonging to the Indo-Aryan languages, Indo-Aryan branch of the Indo-European languages. It arose in northwest South Asia after its predecessor languages had Trans-cultural diffusion, diffused there from the northwest in the late Bronze Age#South Asia, Bronze Age. Sanskrit is the sacred language of Hinduism, the language of classical Hindu philosophy, and of historical texts of Buddhism and Jainism. It was a lingua franca, link language in ancient and medieval South Asia, and upon transmission of Hindu and Buddhist culture to Southeast Asia, East Asia and Central Asia in the early medieval era, it became a language of religion and high culture, and of the political elites in some of these regions. As a result, Sanskrit had a lasting effect on the languages of South Asia, Southeast Asia and East Asia, especially in their formal and learned vocabularies. Sanskrit generally connotes several Indo-Aryan languages# ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
