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Dinantian
Dinantian is the name of a series or epoch from the Lower Carboniferous system in Europe. It can stand for a series of rocks in Europe or the time span in which they were deposited. The Dinantian is equal to the lower part of the Mississippian series in the international geologic timescale of the ICS. The Dinantian is named for the Belgian city of Dinant where strata of this age occur. The name is still used among European geologists. Earlier terms for the Dinantian were Bernician from the Anglo-Scottish borderland, and Avonian (divided into upper (Kidwellian) and lower (Clevedonian) substages) from Kidwelly on the Welsh and Clevedon on the English sides of the Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve .... References {{Geological history, p, p, stat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous United Kingdom
The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' ("coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian lineag ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bernician Series
In geology, Bernician Series was a term proposed by Samuel Pickworth Woodward in 1856 (''Manual of Mollusca'', p. 409) for the lower portion of the Carboniferous System, below the Millstone Grit. The name was suggested by that of the ancient province of Bernicia on the Anglo-Scottish borderland. It is practically equivalent to the "Dinantian" of Albert Auguste de Lapparent and Ernest Munier-Chalmas (1893). In 1875 George Tate's "Calcareous and Carbonaceous" groups of the Carboniferous Limestone series of Northumberland Northumberland () is a ceremonial counties of England, county in Northern England, one of two counties in England which border with Scotland. Notable landmarks in the county include Alnwick Castle, Bamburgh Castle, Hadrian's Wall and Hexham Ab ... were united by George Lebour into a single series, to which he applied the name "Bernician"; but later he spoke of the whole of the Carboniferous rocks of Northumberland and its borders as of the "Bernician t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mississippian Age
The Mississippian ( , also known as Lower Carboniferous or Early Carboniferous) is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous period lasting from roughly 358.9 to 323.2 million years ago. As with most other geochronologic units, the rock beds that define the Mississippian are well identified, but the exact start and end dates are uncertain by a few million years. The Mississippian is so named because rocks with this age are exposed in the Mississippi Valley. The Mississippian was a period of marine transgression in the Northern Hemisphere: the sea level was so high that only the Fennoscandian Shield and the Laurentian Shield were dry land. The cratons were surrounded by extensive delta systems and lagoons, and carbonate sedimentation on the surrounding continental platforms, covered by shallow seas. In North America, where the interval consists primarily of marine limestones, it i ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Timescale
The geologic time scale, or geological time scale, (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (scientific branch of geology that aims to determine the age of rocks). It is used primarily by Earth scientists (including geologists, paleontologists, geophysicists, geochemists, and paleoclimatologists) to describe the timing and relationships of events in geologic history. The time scale has been developed through the study of rock layers and the observation of their relationships and identifying features such as lithologies, paleomagnetic properties, and fossils. The definition of standardized international units of geologic time is the responsibility of the International Commission on Stratigraphy (ICS), a constituent body of the International Union of Geological Sciences (IUGS), whose primary objective is to precisel ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Commission On Stratigraphy
The International Commission on Stratigraphy (ICS), sometimes referred to unofficially as the "International Stratigraphic Commission", is a daughter or major subcommittee grade scientific daughter organization that concerns itself with stratigraphical, geological, and geochronological matters on a global scale. It is the largest subordinate body of the International Union of Geological Sciences (IUGS). The ICS is essentially a permanent working subcommittee, which meets far more regularly than the quadrennial meetings scheduled by the IUGS, when it meets as a congress or membership of the whole. Aims One of its main aims, a project begun in 1974, is to establish a multidisciplinary standard and global geologic time scale that will ease paleontological and geobiological comparisons region to region by benchmarks with stringent and rigorous strata criteria called Global Boundary Stratotype Section and Points (GSSPs) within the fossil record. (i.e. section of the rock rec ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dinant
Dinant () is a city and municipality of Wallonia located in the province of Namur, Belgium. On the shores of river Meuse, in the Ardennes, it lies south-east of Brussels, south-east of Charleroi and south of the city of Namur. Dinant is situated north of the border with France. The municipality consists of the following districts: Anseremme, Bouvignes-sur-Meuse, Dinant, Dréhance, Falmagne, Falmignoul, Foy-Notre-Dame, Furfooz, Lisogne, Sorinnes and Thynes. Geography Dinant is positioned in the Upper Meuse valley, at a point where the river cuts deeply into the western Condroz plateau. Sited in a steep sided valley, between the rock face and the river. The original settlement had little space in which to grow away from the river, and it therefore expanded into a long, thin town, on a north-south axis, along the river shore. During the 19th century, the former ''Île des Batteurs'' (Drummers' Island) to the south was attached directly to the town when a branch of the Meuse w ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Epoch (reference Date)
In chronology and periodization, an epoch or reference epoch is an instant in time chosen as the origin of a particular calendar era. The "epoch" serves as a reference point from which time is measured. The moment of epoch is usually decided by congruity, or by following conventions understood from the epoch in question. The epoch moment or date is usually defined from a specific, clear event of change, an ''epoch event''. In a more gradual change, a deciding moment is chosen when the ''epoch criterion'' was reached. Calendar eras Pre-modern eras * The Yoruba calendar (''Kọ́jọ́dá'') uses 8042 BC as the epoch, regarded as the year of the creation of Ile-Ife by the god Obatala, also regarded as the creation of the earth. * '' Anno Mundi'' (years since the creation of the world) is used in the Byzantine calendar (5509 BC). * '' Anno Mundi'' (years since the creation of the world) as used in the Hebrew calendar (3761 BC). * Olympiads, the ancient Greek era of f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kidwelly
Kidwelly ( cy, Cydweli) is a town and community (Wales), community in Carmarthenshire, southwest Wales, approximately northwest of the most populous town in the county, Llanelli. In the 2001 census the community of Kidwelly returned a population of 3,289, increasing to 3,523 at the 2011 Census. It lies on the River Gwendraeth above Carmarthen Bay. The community includes Mynyddgarreg, Carmarthenshire, Mynyddgarreg and Llangadog. History The earliest written form of the name, 'Cetgueli', is recorded by the monk, Nennius, writing in the 9th century. One theory is that the name means the land, territory, or kingdom of Cadwal. Another theory is that the name is the combination of the two words ''Cyd'' (joint) and ''Gweli'' (bed), i.e., the joining of the two river beds Gwendraeth Fawr and Gwendraeth Fach, wherein Cydweli lies. The town itself is ancient and is shrouded in mystery of its founding, but the most popular theory is that it was founded by local warlords since the area ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Clevedon
Clevedon (, ) is an English seaside town and civil parish in the unitary authority of North Somerset, part of the ceremonial county of Somerset. It recorded a parish population of 21,281 in the United Kingdom Census 2011, estimated at 21,442 in 2019. It lies along the Severn Estuary, among small hills that include Church Hill, Wain's Hill (topped by the remains of an Iron Age hill fort), Dial Hill, Strawberry Hill, Castle Hill, Hangstone Hill and Court Hill, a Site of Special Scientific Interest with overlaid Pleistocene deposits. It features in the ''Domesday Book'' of 1086. Clevedon grew in the Victorian period as a seaside resort and in the 20th century as a dormitory town for Bristol. Facilities and functions The seafront has ornamental gardens, a Victorian bandstand and other attractions. Salthouse Field has a light railway running round the perimeter and is used for donkey rides in the summer. The shore consists of pebbled beaches and low rocky cliffs, with an old har ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
