Ryukyu Arc, the Glossary
The Ryukyu Arc is an island arc which extends from the south of Kyushu along the Ryukyu Islands to the northeast of Taiwan, spanning about.[1]
Table of Contents
100 relations: Accretionary wedge, Allochthon, Amami Islands, Ammonoidea, Ōsumi Islands, Back-arc basin, Breccia, Bryozoa, Calcareous, Cenozoic, Chert, Conglomerate (geology), Continental shelf, Convergent boundary, Cretaceous, Dike (geology), East China Sea, Echinoderm, Erosion, Eurasian Plate, Flysch, Fold (geology), Foraminifera, Forearc, Gastropoda, Geology of Taiwan, Graben, Greenschist, Holocene, Honshu, Igneous intrusion, Igneous rock, Iriomote Island, Ishigaki Island, Island arc, Izu–Bonin–Mariana Arc, Jurassic, Kyushu, Limestone, Low-velocity zone, Mafic, Matrix (geology), Metamorphic facies, Metamorphic rock, Metasedimentary rock, Miocene, Miyako Islands, Miyako Strait, Mollusca, Mudstone, ... Expand index (50 more) »
- Island arcs
- Natural history of the Ryukyu Islands
- Volcanism of Japan
Accretionary wedge
An accretionary wedge or accretionary prism forms from sediments accreted onto the non-subducting tectonic plate at a convergent plate boundary.
See Ryukyu Arc and Accretionary wedge
Allochthon
window. A klippe is a solitary outcrop of the nappe in the middle of autochthonous material. An allochthon, or an allochthonous block, is a large block of rock which has been moved from its original site of formation, usually by low angle thrust faulting.
Amami Islands
The The name Amami-guntō was standardized on February 15, 2010.
See Ryukyu Arc and Amami Islands
Ammonoidea
Ammonoids are extinct spiral shelled cephalopods comprising the subclass Ammonoidea.
Ōsumi Islands
The is an archipelago in the Ryukyu Archipelago, and are the northernmost group of the Ryukyu Islands, The chain extends from the southern tip of Kyushu to Yakushima.
See Ryukyu Arc and Ōsumi Islands
Back-arc basin
A back-arc basin is a type of geologic basin, found at some convergent plate boundaries.
See Ryukyu Arc and Back-arc basin
Breccia
Breccia is a rock composed of large angular broken fragments of minerals or rocks cemented together by a fine-grained matrix.
Bryozoa
Bryozoa (also known as the Polyzoa, Ectoprocta or commonly as moss animals) are a phylum of simple, aquatic invertebrate animals, nearly all living in sedentary colonies.
Calcareous
Calcareous is an adjective meaning "mostly or partly composed of calcium carbonate", in other words, containing lime or being chalky.
Cenozoic
The Cenozoic is Earth's current geological era, representing the last 66million years of Earth's history.
Chert
Chert is a hard, fine-grained sedimentary rock composed of microcrystalline or cryptocrystalline quartz, the mineral form of silicon dioxide (SiO2).
Conglomerate (geology)
Conglomerate is a clastic sedimentary rock that is composed of a substantial fraction of rounded to subangular gravel-size clasts.
See Ryukyu Arc and Conglomerate (geology)
Continental shelf
A continental shelf is a portion of a continent that is submerged under an area of relatively shallow water, known as a shelf sea.
See Ryukyu Arc and Continental shelf
Convergent boundary
A convergent boundary (also known as a destructive boundary) is an area on Earth where two or more lithospheric plates collide.
See Ryukyu Arc and Convergent boundary
Cretaceous
The Cretaceous is a geological period that lasted from about 145 to 66 million years ago (Mya).
Dike (geology)
In geology, a dike or dyke is a sheet of rock that is formed in a fracture of a pre-existing rock body.
See Ryukyu Arc and Dike (geology)
East China Sea
The East China Sea is a marginal sea of the Western Pacific Ocean, located directly offshore from East China.
See Ryukyu Arc and East China Sea
Echinoderm
An echinoderm is any deuterostomal animal of the phylum Echinodermata, which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies".
Erosion
Erosion is the action of surface processes (such as water flow or wind) that removes soil, rock, or dissolved material from one location on the Earth's crust and then transports it to another location where it is deposited.
Eurasian Plate
The Eurasian Plate is a tectonic plate that includes most of the continent of Eurasia (a landmass consisting of the traditional continents of Europe and Asia), with the notable exceptions of the Indian subcontinent, the Arabian subcontinent and the area east of the Chersky Range in eastern Siberia.
See Ryukyu Arc and Eurasian Plate
Flysch
Flysch is a sequence of sedimentary rock layers that progress from deep-water and turbidity flow deposits to shallow-water shales and sandstones.
Fold (geology)
In structural geology, a fold is a stack of originally planar surfaces, such as sedimentary strata, that are bent or curved ("folded") during permanent deformation.
See Ryukyu Arc and Fold (geology)
Foraminifera
Foraminifera (Latin for "hole bearers"; informally called "forams") are single-celled organisms, members of a phylum or class of Rhizarian protists characterized by streaming granular ectoplasm for catching food and other uses; and commonly an external shell (called a "test") of diverse forms and materials.
See Ryukyu Arc and Foraminifera
Forearc
Forearc is a plate tectonic term referring to a region in a subduction zone between an oceanic trench and the associated volcanic arc.
Gastropoda
Gastropods, commonly known as slugs and snails, belong to a large taxonomic class of invertebrates within the phylum Mollusca called Gastropoda.
Geology of Taiwan
The island of Taiwan was formed approximately 4 to 5 million years ago at a convergent boundary between the Philippine Sea Plate and the Eurasian Plate.
See Ryukyu Arc and Geology of Taiwan
Graben
In geology, a graben is a depressed block of the crust of a planet or moon, bordered by parallel normal faults.
Greenschist
Greenschists are metamorphic rocks that formed under the lowest temperatures and pressures usually produced by regional metamorphism, typically and 2–10 kilobars.
See Ryukyu Arc and Greenschist
Holocene
The Holocene is the current geological epoch, beginning approximately 11,700 years ago.
Honshu
, historically called, is the largest and most populous island of Japan.
Igneous intrusion
In geology, an igneous intrusion (or intrusive body or simply intrusion) is a body of intrusive igneous rock that forms by crystallization of magma slowly cooling below the surface of the Earth.
See Ryukyu Arc and Igneous intrusion
Igneous rock
Igneous rock, or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic.
See Ryukyu Arc and Igneous rock
Iriomote Island
is the largest of the Yaeyama Islands of Japan, and the second largest in Okinawa Prefecture after Okinawa Island itself.
See Ryukyu Arc and Iriomote Island
Ishigaki Island
, also known as Ishigakijima, is a Japanese island south-west of Okinawa Hontō and the second-largest island of the Yaeyama Island group, behind Iriomote Island.
See Ryukyu Arc and Ishigaki Island
Island arc
Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries. Ryukyu Arc and Island arc are island arcs.
Izu–Bonin–Mariana Arc
The Izu–Bonin–Mariana (IBM) arc system is a tectonic plate convergent boundary in Micronesia.
See Ryukyu Arc and Izu–Bonin–Mariana Arc
Jurassic
The Jurassic is a geologic period and stratigraphic system that spanned from the end of the Triassic Period million years ago (Mya) to the beginning of the Cretaceous Period, approximately Mya.
Kyushu
is the third-largest island of Japan's four main islands and the most southerly of the four largest islands (i.e. excluding Okinawa).
Limestone
Limestone (calcium carbonate) is a type of carbonate sedimentary rock which is the main source of the material lime.
Low-velocity zone
The low-velocity zone (LVZ) occurs close to the boundary between the lithosphere and the asthenosphere in the upper mantle.
See Ryukyu Arc and Low-velocity zone
Mafic
A mafic mineral or rock is a silicate mineral or igneous rock rich in magnesium and iron.
Matrix (geology)
The matrix or groundmass of a rock is the finer-grained mass of material in which larger grains, crystals, or clasts are embedded.
See Ryukyu Arc and Matrix (geology)
A metamorphic facies is a set of mineral assemblages in metamorphic rocks formed under similar pressures and temperatures.
See Ryukyu Arc and Metamorphic facies
Metamorphic rocks arise from the transformation of existing rock to new types of rock in a process called metamorphism.
See Ryukyu Arc and Metamorphic rock
In geology, metasedimentary rock is a type of metamorphic rock.
See Ryukyu Arc and Metasedimentary rock
Miocene
The Miocene is the first geological epoch of the Neogene Period and extends from about (Ma).
Miyako Islands
The (also Miyako Jima group) are a group of islands in Okinawa Prefecture, Japan, belonging to the Ryukyu Islands.
See Ryukyu Arc and Miyako Islands
Miyako Strait
The, also known as the Kerama Gap, is a waterway which lies between Miyako Island and Okinawa Island consisting of a 250km-wide passageway with international waters and airspace.
See Ryukyu Arc and Miyako Strait
Mollusca
Mollusca is the second-largest phylum of invertebrate animals, after Arthropoda; members are known as molluscs or mollusks.
Mudstone
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds.
Nummulite
A nummulite is a large lenticular fossil, characterised by its numerous coils, subdivided by septa into chambers.
Okinawa Island
, officially, is the largest of the Okinawa Islands and the Ryukyu (Nansei) Islands of Japan in the Kyushu region.
See Ryukyu Arc and Okinawa Island
Okinawa Islands
The are an island group in Okinawa Prefecture, Japan and are the principal island group of the prefecture.
See Ryukyu Arc and Okinawa Islands
Okinawa Trough
The (also called, literally China-Ryukyu Border Trough) is a seabed feature of the East China Sea.
See Ryukyu Arc and Okinawa Trough
Oligocene
The Oligocene is a geologic epoch of the Paleogene Period and extends from about 33.9 million to 23 million years before the present (to). As with other older geologic periods, the rock beds that define the epoch are well identified but the exact dates of the start and end of the epoch are slightly uncertain.
Olistostrome
An olistostrome is a sedimentary deposit composed of a chaotic mass of heterogeneous material, such as blocks and mud, known as olistoliths, that accumulates as a semifluid body by submarine gravity sliding or slumping of the unconsolidated sediments.
See Ryukyu Arc and Olistostrome
Pacific Ocean
The Pacific Ocean is the largest and deepest of Earth's five oceanic divisions.
See Ryukyu Arc and Pacific Ocean
Paleomagnetism
Paleomagnetism (occasionally palaeomagnetism) is the study of prehistoric Earth's magnetic fields recorded in rocks, sediment, or archeological materials.
See Ryukyu Arc and Paleomagnetism
Paleontology
Paleontology, also spelled palaeontology or palæontology, is the scientific study of life that existed prior to the start of the Holocene epoch (roughly 11,700 years before present).
See Ryukyu Arc and Paleontology
Paleozoic
The Paleozoic (or Palaeozoic) Era is the first of three geological eras of the Phanerozoic Eon.
Pangaea
Pangaea or Pangea was a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
Panthalassa
Panthalassa, also known as the Panthalassic Ocean or Panthalassan Ocean (from Greek πᾶν "all" and θάλασσα "sea"), was the vast superocean that encompassed planet Earth and surrounded the supercontinent Pangaea, the latest in a series of supercontinents in the history of Earth.
See Ryukyu Arc and Panthalassa
Permian
The Permian is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.902 Mya.
Philippine Sea Plate
The Philippine Sea Plate or the Philippine Plate is a tectonic plate comprising oceanic lithosphere that lies beneath the Philippine Sea, to the east of the Philippines.
See Ryukyu Arc and Philippine Sea Plate
Phyllite
Phyllite is a type of foliated metamorphic rock formed from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation.
Pleistocene
The Pleistocene (often referred to colloquially as the Ice Age) is the geological epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations.
See Ryukyu Arc and Pleistocene
Pliocene
The Pliocene (also Pleiocene) is the epoch in the geologic time scale that extends from 5.333 million to 2.58 million years ago.
Radiolaria
The Radiolaria, also called Radiozoa, are protozoa of diameter 0.1–0.2 mm that produce intricate mineral skeletons, typically with a central capsule dividing the cell into the inner and outer portions of endoplasm and ectoplasm.
Radiometric dating
Radiometric dating, radioactive dating or radioisotope dating is a technique which is used to date materials such as rocks or carbon, in which trace radioactive impurities were selectively incorporated when they were formed.
See Ryukyu Arc and Radiometric dating
Reflection seismology
Reflection seismology (or seismic reflection) is a method of exploration geophysics that uses the principles of seismology to estimate the properties of the Earth's subsurface from reflected seismic waves.
See Ryukyu Arc and Reflection seismology
Rift
In geology, a rift is a linear zone where the lithosphere is being pulled apart and is an example of extensional tectonics.
Ryukyu Islands
The, also known as the or the, are a chain of Japanese islands that stretch southwest from Kyushu to Taiwan: the Ōsumi, Tokara, Amami, Okinawa, and Sakishima Islands (further divided into the Miyako and Yaeyama Islands), with Yonaguni the westernmost.
See Ryukyu Arc and Ryukyu Islands
Ryukyu Trench
The, also called Nansei-Shotō Trench, is a 1398 km (868 mi) long oceanic trench located along the southeastern edge of Japan's Ryukyu Islands in the Philippine Sea in the Pacific Ocean, between northeastern Taiwan and southern Japan. Ryukyu Arc and Ryukyu Trench are Natural history of the Ryukyu Islands.
See Ryukyu Arc and Ryukyu Trench
Sandstone
Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains, cemented together by another mineral.
Schist
Schist is a medium-grained metamorphic rock showing pronounced schistosity.
Sedimentary rock
Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation.
See Ryukyu Arc and Sedimentary rock
Sedimentation
Sedimentation is the deposition of sediments.
See Ryukyu Arc and Sedimentation
Seismicity
Seismicity is a measure encompassing earthquake occurrences, mechanisms, and magnitude at a given geographical location.
Sesoko Island
Sesoko Island (瀬底島, Japanese: Sesoko-jima, Okinawan: Shisuku-jima) is a small island in Okinawa Prefecture, Japan.
See Ryukyu Arc and Sesoko Island
Shale
Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2Si2O5(OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.
Shikoku
, is the smallest of the four main islands of Japan.
Siliceous rock
Siliceous rocks are sedimentary rocks that have silica (SiO2) as the principal constituent.
See Ryukyu Arc and Siliceous rock
Sill (geology)
In geology, a sill is a tabular sheet intrusion that has intruded between older layers of sedimentary rock, beds of volcanic lava or tuff, or along the direction of foliation in metamorphic rock.
See Ryukyu Arc and Sill (geology)
Siltstone
Siltstone, also known as aleurolite, is a clastic sedimentary rock that is composed mostly of silt.
Slate
Slate is a fine-grained, foliated, homogeneous, metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade, regional metamorphism.
Taiwan
Taiwan, officially the Republic of China (ROC), is a country in East Asia.
Taketomi Island
is an island in the town of Taketomi, within Yaeyama District of Okinawa Prefecture, Japan.
See Ryukyu Arc and Taketomi Island
Tectonic subsidence
Tectonic subsidence is the sinking of the Earth's crust on a large scale, relative to crustal-scale features or the geoid.
See Ryukyu Arc and Tectonic subsidence
Tectonic uplift
Tectonic uplift is the geologic uplift of Earth's surface that is attributed to plate tectonics.
See Ryukyu Arc and Tectonic uplift
Terrigenous sediment
In oceanography, terrigenous sediments are those derived from the erosion of rocks on land; that is, they are derived from terrestrial (as opposed to marine) environments.
See Ryukyu Arc and Terrigenous sediment
Thrust fault
A thrust fault is a break in the Earth's crust, across which older rocks are pushed above younger rocks.
See Ryukyu Arc and Thrust fault
Toarcian
The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic.
Trace fossil
A trace fossil, also known as an ichnofossil (from ἴχνος ikhnos "trace, track"), is a fossil record of biological activity by lifeforms but not the preserved remains of the organism itself.
See Ryukyu Arc and Trace fossil
Triassic
The Triassic (sometimes symbolized 🝈) is a geologic period and system which spans 50.5 million years from the end of the Permian Period 251.902 million years ago (Mya), to the beginning of the Jurassic Period 201.4 Mya.
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption.
Ultramafic rock
Ultramafic rocks (also referred to as ultrabasic rocks, although the terms are not wholly equivalent) are igneous and meta-igneous rocks with a very low silica content (less than 45%), generally >18% MgO, high FeO, low potassium, and are composed of usually greater than 90% mafic minerals (dark colored, high magnesium and iron content).
See Ryukyu Arc and Ultramafic rock
Unconformity
An unconformity is a buried erosional or non-depositional surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous.
See Ryukyu Arc and Unconformity
Wadati–Benioff zone
A Wadati–Benioff zone (also Benioff–Wadati zone or Benioff zone or Benioff seismic zone) is a planar zone of seismicity corresponding with the down-going slab in a subduction zone.
See Ryukyu Arc and Wadati–Benioff zone
Yaeyama Islands
The Yaeyama Islands (八重山列島 Yaeyama-rettō, also 八重山諸島 Yaeyama-shotō, Yaeyama: Yaima, Yonaguni: Daama, Okinawan: Yeema, Northern Ryukyuan: やへま Yapema) are an archipelago in the southwest of Okinawa Prefecture, Japan, and cover.
See Ryukyu Arc and Yaeyama Islands
Year
A year is the time taken for astronomical objects to complete one orbit.
See also
Island arcs
- Banda Arc
- Cayman Ridge
- Chaitenia
- Halmahera Arc
- Inner Banda Arc
- Island arc
- Outer Banda Arc
- Ryukyu Arc
- Sakhalin Island Arc
- Scotia Arc
Natural history of the Ryukyu Islands
Volcanism of Japan
- 1741 eruption of Oshima–Ōshima and the Kampo tsunami
- 1888 eruption of Mount Bandai
- Daisetsuzan Volcanic Group
- Mount Raiden Volcanic Group
- Nipesotsu-Maruyama Volcanic Group
- Niseko Volcanic Group
- Ryukyu Arc
- Shikaribetsu Volcanic Group
- Tatami-ishi
- Tokachi Volcanic Group
- Tomuraushi Volcanic Group
- Tōjinbō
- Volcanoes of Japan
References
[1] https://en.wikipedia.org/wiki/Ryukyu_Arc
Also known as Ryukyu arc-trench system.
, Nummulite, Okinawa Island, Okinawa Islands, Okinawa Trough, Oligocene, Olistostrome, Pacific Ocean, Paleomagnetism, Paleontology, Paleozoic, Pangaea, Panthalassa, Permian, Philippine Sea Plate, Phyllite, Pleistocene, Pliocene, Radiolaria, Radiometric dating, Reflection seismology, Rift, Ryukyu Islands, Ryukyu Trench, Sandstone, Schist, Sedimentary rock, Sedimentation, Seismicity, Sesoko Island, Shale, Shikoku, Siliceous rock, Sill (geology), Siltstone, Slate, Taiwan, Taketomi Island, Tectonic subsidence, Tectonic uplift, Terrigenous sediment, Thrust fault, Toarcian, Trace fossil, Triassic, Tuff, Ultramafic rock, Unconformity, Wadati–Benioff zone, Yaeyama Islands, Year.