Makassar Strait | |
---|---|
Selat Makassar (Indonesian) | |
Location | Indonesia |
Coordinates | 0°0′0″N118°30′00″E / 0.00000°N 118.50000°E |
Type | strait |
Basin countries | Indonesia |
Islands | +100 |
Settlements | Balikpapan, Bontang (Kalimantan) Makassar, Palu, Parepare (Sulawesi) |
References | Macassar Strait: OS (Oceans) National Geospatial-Intelligence Agency, Bethesda, MD, USA |
Makassar Strait (Indonesian : Selat Makassar) is a strait between the islands of Borneo and Sulawesi in Indonesia. To the north it joins the Celebes Sea, while to the south it meets the Java Sea. To the northeast, it forms the Sangkulirang Bay south of the Mangkalihat Peninsula. The strait is an important regional shipping route in Southeast Asia.
The Mahakam River and Karangan River of Borneo empty into the strait.
Ports along the strait include Balikpapan and Bontang in Borneo, and Makassar, Palu, and Parepare in Sulawesi. The city of Samarinda is 48 km (30 mi) from the strait, along the Mahakam.
The International Hydrographic Organization (IHO) defines the Makassar Strait as being one of the waters of the East Indian Archipelago. The IHO defines its limits as follows: [1]
The channel between the East coast of Borneo and the West coast of Celebes [ Sulawesi ], is bounded:
On the North. By a line joining Tanjong Mangkalihat, Borneo ( 1°02′N118°57′E / 1.033°N 118.950°E ) and Stroomen Kaap (Cape Binar), Celebes ( 1°20′N120°52′E / 1.333°N 120.867°E ).
On the South. By a line from the Southwestern extreme of Celebes ( 5°37′S119°27′E / 5.617°S 119.450°E ), through the Southern point of Tana Keke, to the Southern extreme of Laoet ( 4°06′S116°06′E / 4.100°S 116.100°E ) thence up the West coast of that island to Tanjong Kiwi and thence across to Tanjong Petang, Borneo ( 3°37′S115°57′E / 3.617°S 115.950°E ) at the Southern end of Laoet Strait.
The Makassar Strait and North Makassar Basin is the result of back-arc extension due to the subduction of a small tectonic slab to the east. [2] Rifting began in the Eocene, with high sedimentation rates filling the extension basin throughout the Eocene through Miocene. These Miocene basin sediments hold very large amounts of oil and natural gas deposits, especially in the hydrocarbon rich Kutei Basin.
The arrival of the Benggai Sula microplate has rotated the Island of Sulawesi in a counter-clockwise direction, allowing opening of the southern Makassar Basin with accommodation by the Adang/Paternoster Fault.
Sulawesi, also known as Celebes, is an island in Indonesia. One of the four Greater Sunda Islands, and the world's 11th-largest island, it is situated east of Borneo, west of the Maluku Islands, and south of Mindanao and the Sulu Archipelago. Within Indonesia, only Sumatra, Borneo, and Papua are larger in territory, and only Java and Sumatra are more populous.
The Sulu Sea is a body of water in the southwestern area of the Philippines, separated from the South China Sea in the northwest by Palawan and from the Celebes Sea in the southeast by the Sulu Archipelago. Borneo is found to the southwest and Visayas to the northeast.
East Kalimantan is a province of Indonesia. Its territory comprises the eastern portion of Borneo/Kalimantan. It had a population of about 3.03 million at the 2010 census, 3.42 million at the 2015 census, and 3.766 million at the 2020 census; the official estimate as at mid 2023 was 4,030,488. Its capital is the city of Samarinda.
The Java Sea is an extensive shallow sea on the Sunda Shelf, between the Indonesian islands of Borneo to the north, Java to the south, Sumatra to the west, and Sulawesi to the east. Karimata Strait to its northwest links it to the South China Sea. Although generally considered to be a part of the western Pacific Ocean, the Java Sea is occasionally considered to be a part of the Indian Ocean.
The Celebes Sea or Sulawesi Sea of the western Pacific Ocean is bordered on the north by the Sulu Archipelago and Sulu Sea and Mindanao Island of the Philippines, on the east by the Sangihe Islands chain, on the south by Sulawesi's Minahasa Peninsula, and the west by northern Kalimantan in Indonesia. It extends 420 miles (675 km) north-south by 520 mi (840 km) east-west and has a total surface area of 110,000 square miles (280,000 km2), to a maximum depth of 20,300 feet (6,200 m). South of the Cape Mangkalihat, the sea opens southwest through the Makassar Strait into the Java Sea.
The Savu Sea is a small sea within Indonesia named for the island of Savu (Sawu) on its southern boundary. It is bounded by Savu and Raijua to the south, the islands of Rote and Timor to the east, Flores and the Alor archipelago to the north/northwest, and the island of Sumba to the west/northwest. Between these islands, it flows into the Indian Ocean to the south and west, the Flores Sea to the north, and the Banda Sea to the northeast.
The Banda Sea is one of four seas that surround the Maluku Islands of Indonesia, connected to the Pacific Ocean, but surrounded by hundreds of islands, including Timor, as well as the Halmahera and Ceram Seas. It is about 1000 km (600 mi) east to west, and about 500 km (300 mi) north to south.
The Mahakam River is third longest and volume discharge river in Borneo after Kapuas River and Barito River, it is located in Kalimantan, Indonesia. It flows 980 kilometers from the district of Long Apari in the highlands of Borneo, to its mouth at the Makassar Strait.
The Flores Sea covers 240,000 square kilometres (93,000 sq mi) of water in Indonesia. The sea is bounded on the north by the island of Celebes and on the south by the Sunda Islands of Flores and Sumbawa.
The Molucca Sea is located in the western Pacific Ocean, around the vicinity of Indonesia, specifically bordered by the Indonesian Islands of Celebes (Sulawesi) to the west, Halmahera to the east, and the Sula Islands to the south. The Molucca Sea has a total surface area of 77,000 square miles. The Molucca Sea is rich in coral and has many diving sites due to the deepness of its waters. The deepness of the water explains the reasoning behind dividing the sea into three zones, which functions to transport water from the Pacific Ocean to the shallower seas surrounding it. The deepest hollow in the Molucca Sea is the 15,780-foot (4,810-meter) Batjan basin. This region is known for its periodic experiences of earthquakes, which stems from the sea itself being a micro plate, in which the Molucca Sea is being subducted in two opposite directions: one in the direction of the Eurasian Plate to the west and the other in the direction of the Philippine Sea Plate to the east.
The Seram Sea or Ceram Sea is one of several small seas between the scattered islands of Indonesia. It is a section of the Pacific Ocean with an area of approximately 120,000 km2 (46,000 sq mi) located between Buru and Seram, which are two of the islands once called the South Moluccas. These islands are the native habitat of plants long coveted for their use as spices, such as nutmeg, cloves, and black peppercorns, and the seas surrounding them were busy shipping routes. The Seram Sea is also the habitat of several species of tropical goby and many other fish. Like many other small Indonesian seas, the Seram Sea is rocky and very tectonically active.
The Bali Sea is the body of water north of the island of Bali and south of Kangean Island in Indonesia. The sea forms the south-west part of the Flores Sea, and the Madura Strait opens into it from the west.
This is an article about the extreme points of Indonesia.
Kutai is a historical region in what is now the Indonesian province of East Kalimantan on the island of Borneo. The region shares its name with the native ethnic group of the region, with a total population around 300,000, who have their own language known as the Kutainese language which accompanies their own rich history. Today, the name is preserved in the names of three regencies in East Kalimantan province which are the Kutai Kartanegara Regency, the West Kutai Regency and East Kutai Regency with the major river flowing in the heart of the region known as the Mahakam River. The Kutai Martadipura Kingdom (399–1635) was the earliest Hindu kingdom in the East Indies. It was later succeeded by the Muslim sultanate of Kutai Kartanegara (1300–1844).
The Gulf of Boni, also known as the Gulf of Bone, Bay of Boni, and Bone Bay, is the gulf which divides the South and Southeast Peninsulas of the island of Sulawesi (Celebes) in Indonesia. It opens on the south into the Banda Sea.
The East Indian Archipelago is an area designated by the International Hydrographic Organization (IHO). It encompasses twelve seas, two gulfs, and one strait in the East Indies.
The borders of the oceans are the limits of Earth's oceanic waters. The definition and number of oceans can vary depending on the adopted criteria. The principal divisions of the five oceans are the Pacific Ocean, Atlantic Ocean, Indian Ocean, Southern (Antarctic) Ocean, and Arctic Ocean. Smaller regions of the oceans are called seas, gulfs, bays, straits, and other terms. Geologically, an ocean is an area of oceanic crust covered by water.
The Kutai sedimentary basin extends from the central highlands of Borneo, across the eastern coast of the island and into the Makassar Strait. With an area of 60,000 km2, and depths up to 15 km, the Kutai is the largest and deepest Tertiary age basin in Indonesia. Plate tectonic evolution in the Indonesian region of SE Asia has produced a diverse array of basins in the Cenozoic. The Kutai is an extensional basin in a general foreland setting. Its geologic evolution begins in the mid Eocene and involves phases of extension and rifting, thermal sag, and isostatic subsidence. Rapid, high volume, sedimentation related to uplift and inversion began in the Early Miocene. The different stages of Kutai basin evolution can be roughly correlated to regional and local tectonic events. It is also likely that regional climate, namely the onset of the equatorial ever wet monsoon in early Miocene, has affected the geologic evolution of Borneo and the Kutai basin through the present day. Basin fill is ongoing in the lower Kutai basin, as the modern Mahakam River delta progrades east across the continental shelf of Borneo.
Cape Mangkalihat, also known as Cape Sangkulirang, is a cape in eastern Borneo. It is located in the Indonesian province of East Kalimantan, in the regencies of Berau and East Kutai.