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Late Campanian
The Campanian is the fifth of six ages of the Late Cretaceous epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 (± 0.2) to 72.1 (± 0.2) million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian. The Campanian was an age when a worldwide sea level rise covered many coastal areas. The morphology of some of these areas has been preserved: it is an unconformity beneath a cover of marine sedimentary rocks. Etymology The Campanian was introduced in scientific literature by Henri Coquand in 1857. It is named after the French village of Champagne in the department of Charente-Maritime. The original type locality was a series of outcrops near the village of Aubeterre-sur-Dronne in the same region. Definition The base of the Campanian Stage is defined as a place in the stratigraphic column whe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
International Commission On Stratigraphy
The International Commission on Stratigraphy (ICS), sometimes unofficially referred to as the International Stratigraphic Commission, is a daughter or major subcommittee grade scientific organization that concerns itself with stratigraphy, stratigraphical, geology, geological, and chronology, geochronological matters, worldwide. It is the largest subordinate body of the International Union of Geological Sciences (IUGS). The ICS is essentially a permanent working committee, working subcommittee, which meets far more regularly than the quadrennial meetings scheduled by the IUGS, when it meets as a congress or committee, 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 paleontology, paleontological and geobiology, geobiological comparisons region to region by benchmarks with stringent and rigorous strata criteria called Global Boundary Stratotype Section and Points ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marine Transgression
A marine transgression is a geologic event where sea level rises relative to the land and the shoreline moves toward higher ground, resulting in flooding. Transgressions can be caused by the land sinking or by the ocean basins filling with water or decreasing in capacity. Transgressions and regressions may be caused by tectonic events like orogenies, severe climate change such as ice ages or isostatic adjustments following removal of ice or sediment load. During the Cretaceous, seafloor spreading created a relatively shallow Atlantic basin at the expense of a deeper Pacific basin. That reduced the world's ocean basin capacity and caused a rise in sea level worldwide. As a result of the sea level rise, the oceans transgressed completely across the central portion of North America and created the Western Interior Seaway from the Gulf of Mexico to the Arctic Ocean. The opposite of transgression is regression where the sea level falls relative to the land and exposes the form ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marsupites
''Marsupites'' is an extinct genus of crinoids from the Santonian stage of the Late Cretaceous.''Marsupites'' at Fossilworks.org Biostratigraphic significance The International Commission on Stratigraphy (ICS) had provisionally assigned the extinction of ''Marsupites testudinarius'' as the List of Global Boundary Stratotype Sections and Points#List, defining biological marker for the start of the Campanian stage of the Late Cretaceous, 83.6 ± 0.2 million years ago, until a new final definition was eventually ratified in 2022, based instead primarily on magnetostratigraphy.Distribution Fossils of the genus have been found in: * Lipnik, Pińczów County, Lipnik, PolandLach & Salamon, 2016 * Haslam Formation, British Columbia, Canada[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoid
Crinoids are marine invertebrates that make up the class Crinoidea. Crinoids that remain attached to the sea floor by a stalk in their adult form are commonly called sea lilies, while the unstalked forms, called feather stars or comatulids, are members of the largest crinoid order, Comatulida. Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths of over . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a sho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinction
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aubeterre-sur-Dronne
Aubeterre-sur-Dronne (, literally ''Aubeterre on Dronne''; or ''Aubaterra de Drona'', before 1962: ''Aubeterre'') is a Communes of France, commune in the Charente Departments of France, department in the Nouvelle-Aquitaine Regions of France, region of Southwestern France. Located on the river Dronne, on the departmental border with Dordogne, Aubeterre-sur-Dronne has been a member of Les Plus Beaux Villages de France (The Most Beautiful Villages of France) Association since 1993. It is well known for its Church of Saint Jean, an underground, Monolithic church. Geography Aubeterre-sur-Dronne is located in the extreme southeast of the Charente department some 42 km (26 mi) south of Angoulême, 14 km (8.6 mi) east of Chalais, Charente, Chalais and 16 km (9.9 mi) west by northwest of Ribérac. The entire eastern border is the Dronne river which is the boundary between the Charente and Dordogne departments. Access to the commune is by the departmental r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Outcrop
An outcrop or rocky outcrop is a visible exposure of bedrock or ancient superficial deposits on the surface of the Earth and other terrestrial planets. Features Outcrops do not cover the majority of the Earth's land surface because in most places the bedrock or superficial deposits are covered by soil and vegetation and cannot be seen or examined closely. However, in places where the overlying cover is removed through erosion or tectonic uplift, the rock may be exposed, or ''crop out''. Such exposure will happen most frequently in areas where erosion is rapid and exceeds the weathering rate such as on steep hillsides, mountain ridges and tops, river banks, and tectonically active areas. In Finland, glacial erosion during the last glacial maximum (ca. 11000 BC), followed by scouring by sea waves, followed by isostatic uplift has produced many smooth coastal and littoral outcrops. Bedrock and superficial deposits may also be exposed at the Earth's surface due to human exca ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Type Locality (geology)
Type locality, also called type area, is the locality where a particular rock type, stratigraphic unit or mineral species is first identified. If the stratigraphic unit in a locality is layered, it is called a stratotype, whereas the standard of reference for unlayered rocks is the type locality. The concept is similar to type site in archaeology. Examples of geological type localities Rocks and minerals * Aragonite: Molina de Aragón, Guadalajara, Spain * Autunite: Autun, France * Benmoreite: Ben More (Mull), Scotland * Blairmorite: Blairmore, Alberta, Canada * Boninite: Bonin Islands, Japan * Comendite: Comende, San Pietro Island, Sardinia * Cummingtonite: Cummington, Massachusetts * Dunite: Dun Mountain, New Zealand * Essexite: Essex County, Massachusetts, US * Fayalite: Horta, Fayal Island, Azores, Portugal * Harzburgite: Bad Harzburg, Germany * Icelandite: Thingmuli (Þingmúli), Iceland * Ijolite: Iivaara, Kuusamo, Finland * Kimberlite: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Charente-Maritime
Charente-Maritime (; Poitevin-Saintongeais: ''Chérente-Marine''; ) is a Departments of France, department in the French Regions of France, region of Nouvelle-Aquitaine, on the country's west coast. Named after the river Charente (river), Charente, its Prefectures in France, prefecture is La Rochelle. As of 2019, it had a population of 651,358 with an area of 6,864 square kilometres (2,650 sq mi). History The history of the department begins with a decree from the National Constituent Assembly (France), Constituent Assembly on December 22, 1789, which took effect on March 4, 1790, creating it as one of the 83 original departments during the French Revolution. Named “Charente-Inférieure” after the lower course of the Charente (river), Charente, it was renamed Charente-Maritime on September 4, 1941, during World War II, reflecting its Atlantic Ocean, Atlantic coast identity. The department encompasses most of the former province of County of Saintonge, Saintonge (excluding Co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Champagne, Charente-Maritime
Champagne () is a commune in the Charente-Maritime department in southwestern France. Population See also * The Campanian Age of the Cretaceous Period of geological time is named for the commune of Champagne * Communes of the Charente-Maritime department The following is a list of the 462 communes of the Charente-Maritime department of France. The communes cooperate in the following intercommunalities (as of 2025): References External links * Communes of Charente-Maritime {{CharenteMaritime-geo-stub ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henri Coquand
Henri Coquand (1813, in Aix-en-Provence – 1881, in Marseille) was a French geologist and paleontologist. In 1841 he obtained his doctorate in sciences in Paris, and later served as a professor of geology at the University of Besançon, Poitiers and Marseille.Prosopo Sociétés savantes From his geological studies of southwestern France, he introduced the stages: Coniacian, and |
Global And Planetary Change
''Global and Planetary Change'' is a monthly peer-reviewed scientific journal covering research into the earth sciences, particularly pertaining to changes in aspects thereof such as sea level and the chemical composition of the atmosphere. It has been published by Elsevier since it was established in 1989. The editors-in-chief are Alan Haywood, Jed Kaplan, Trude Storelvmo, Liviu Matenco, Zhengtang Guo, Maoyan Zhu, Fabienne Marret-Davies, Howard Falcon-Lang. According to the ''Journal Citation Reports'', the journal has a 2021 impact factor The impact factor (IF) or journal impact factor (JIF) of an academic journal is a type of journal ranking. Journals with higher impact factor values are considered more prestigious or important within their field. The Impact Factor of a journa ... of 5.114. References External links * Earth and atmospheric sciences journals Planetary science journals Academic journals established in 1989 Elsevier academic journals Monthly jour ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
