|
Cremnoceramus
''Cremnoceramus'' ("cremno-" = ''kremnos'' reek precipice or over hanging wall or bank; "ceramus" = ''keramos'' reek clay pot) is an extinct genus of fossil marine pteriomorphian bivalves that superficially resembled the related winged pearly oysters of the extant genus '' Pteria''. They lived from the Turonian to the Maastrichtian of the Late Cretaceous. Description ''Cremnoceramus'' were facultatively mobile, blind, suspension feeding bivalves with low-magnesium calcite shells. ''Inoceramids'', like the ''Cremnoceramus'' in particular, had thick shells composed of particular "prisms" of calcite deposited perpendicular to the surface, and unweathered fossils commonly preserve the mother-of-pearl luster the shells had in life. Compared to the many examples of broad and flattened ''Inoceramidae'', ''Cremnoceramus'' shells are rather "high-walled", deep bowl-shaped. The top shell is commonly encrusted with oysters. Species The following species are recognized: * ''C. c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cremnoceramus Rotundatus
''Cremnoceramus'' ("cremno-" = ''kremnos'' reek precipice or over hanging wall or bank; "ceramus" = ''keramos'' reek clay pot) is an extinct genus of fossil marine pteriomorphian bivalves that superficially resembled the related winged pearly oysters of the extant genus '' Pteria''. They lived from the Turonian to the Maastrichtian of the Late Cretaceous. Description ''Cremnoceramus'' were facultatively mobile, blind, suspension feeding bivalves with low-magnesium calcite shells. ''Inoceramids'', like the ''Cremnoceramus'' in particular, had thick shells composed of particular "prisms" of calcite deposited perpendicular to the surface, and unweathered fossils commonly preserve the mother-of-pearl luster the shells had in life. Compared to the many examples of broad and flattened ''Inoceramidae'', ''Cremnoceramus'' shells are rather "high-walled", deep bowl-shaped. The top shell is commonly encrusted with oysters. Species The following species are recognized: * ''C. crassus ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coniacian
The Coniacian is an age or stage in the geologic timescale. It is a subdivision of the Late Cretaceous Epoch or Upper Cretaceous Series and spans the time between 89.8 ± 1 Ma and 86.3 ± 0.7 Ma (million years ago). The Coniacian is preceded by the Turonian and followed by the Santonian. Stratigraphic definitions The Coniacian is named after the city of Cognac in the French region of Saintonge. It was first defined by French geologist Henri Coquand in 1857. The base of the Coniacian Stage is at the first appearance of the inoceramid bivalve species '' Cremnoceramus deformis erectus''. The official reference profile for the base (a GSSP) is located in Salzgitter-Salder, Lower Saxony, Germany. The top of the Coniacian (the base of the Santonian Stage) is defined by the appearance of the inoceramid bivalve ''Cladoceramus undulatoplicatus''. The Coniacian overlaps the regional Emscherian Stage of Germany, which is roughly coeval with the Coniacian and Santonian Stages. In magne ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Turonian
The Turonian is, in the ICS' geologic timescale, the second age in the Late Cretaceous Epoch, or a stage in the Upper Cretaceous Series. It spans the time between 93.9 ± 0.8 Ma and 89.8 ± 1 Ma (million years ago). The Turonian is preceded by the Cenomanian Stage and underlies the Coniacian Stage. At the beginning of the Turonian an oceanic anoxic event (OAE 2) took place, also referred to as the Cenomanian-Turonian boundary event or the "Bonarelli Event". Stratigraphic definition The Turonian (French: ''Turonien'') was defined by the French paleontologist Alcide d'Orbigny (1802–1857) in 1842. Orbigny named it after the French city of Tours in the region of Touraine (department Indre-et-Loire), which is the original type locality. The base of the Turonian Stage is defined as the place where the ammonite species '' Watinoceras devonense'' first appears in the stratigraphic column. The official reference profile (the GSSP) for the base of the Turonian is located in the Roc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Filter Feeder
Filter feeders are a sub-group of suspension feeding animals that feed by straining suspended matter and food particles from water, typically by passing the water over a specialized filtering structure. Some animals that use this method of feeding are clams, krill, sponges, baleen whales, and many fish (including some sharks). Some birds, such as flamingos and certain species of duck, are also filter feeders. Filter feeders can play an important role in clarifying water, and are therefore considered ecosystem engineers. They are also important in bioaccumulation and, as a result, as indicator organisms. Fish Most forage fish are filter feeders. For example, the Atlantic menhaden, a type of herring, lives on plankton caught in midwater. Adult menhaden can filter up to four gallons of water a minute and play an important role in clarifying ocean water. They are also a natural check to the deadly red tide. Extensive article on the role of menhaden in the ecosystem and possible resul ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Arnager Limestone Formation
Arnager is a small fishing village in Rønne parish, Bornholm island, Denmark. It is approximately southwest of Nylars, about southeast of Rønne, and approximately southeast of Bornholm Airport. Its population in 2010 was 151 residents. Arnager Bay is east of Arnager. According to ''Bornholm Place Names'', Arnager was first mentioned in 1552 as "Arenack" in one of the Chancery letter books. The harbor was built in 1883 by H. Zahrtmann. For some time, the village was one of the main resting places for the island's missionaries. The city is notable for having Scandinavia's longest wooden bridge. The structure links the port with the city. In the mid 1990s, |
Pointe-Noire
Pointe-Noire (; kg, Njinji, french: Ndjindji with the letter d following French spelling standards) is the second largest city in the Republic of the Congo, following the capital of Brazzaville, and an autonomous department since 2004. Before this date it was the capital of the Kouilou region (now a separate department). It is situated on a headland between Pointe-Noire Bay and the Atlantic Ocean. Pointe-Noire is the main commercial centre of the country and has a population of 715,334 (2007), expanding to well over 1 million when the entire metropolitan area is taken into account. Climate Pointe-Noire has a tropical savanna climate under the Köppen climate classification. The city has a wet season that spans from October through April, while the remaining 5 months form the dry season. Pointe-Noire receives roughly of precipitation annually. Temperatures are somewhat cooler during the dry season with average temperatures roughly at 24 degrees Celsius. During the wet season, a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gosau Formation
The Gosau Group (German: ''Gosau-Gruppe'') is a geological stratigraphic group in Austria, Germany and western Slovakia whose strata date back to the Late Cretaceous to Eocene.Höfling, 1985McCann, 2008 It is exposed in numerous sporadic isolated basins within the Northern Calcareous Alps. It is divided into two subgroups, the Lower Gosau Subgroup which dates from the Turonian to Campanian, approximately 90 to 75 Ma and the Upper Gosau Subgroup which dates to the Santonian to Eocene, about 83.5 to 50 Ma. The formations within each subunit vary significantly between basins. The sequence is largely marine, but the Grünbach Formation represents a terrestrial deposit. Many of the units of the group are fossiliferous, typically providing marine fossils such as ammonites, though terrestrial remains including those of dinosaurs are known from the Grünbach Formation and Schönleiten Formation. Fossil content Among others, the following fossils have been described from the Gosau Group: ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossilworks
Fossilworks is a portal which provides query, download, and analysis tools to facilitate access to the Paleobiology Database The Paleobiology Database is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms. History The Paleobiology Database (PBDB) originated in the NCEAS-funded Phanerozoic Marine Pale ..., a large relational database assembled by hundreds of paleontologists from around the world. History Fossilworks was created in 1998 by John Alroy and is housed at Macquarie University. It includes many analysis and data visualization tools formerly included in the Paleobiology Database.{{cite web, title=Frequently asked questions, url=http://www.fossilworks.org/cgi-bin/bridge.pl?page=FAQ, publisher=Fossilworks, access-date=17 December 2021 References {{Reflist External links {{Wikidata property, P842 * [Baidu] |
