|
Yanigua Formation
The Yanigua Formation is a geologic formation in Dominican Republic. The lagoonal claystones and marls preserve fossils dating back to the Miocene period. at .org The formation hosts . Fossil content * '' Aureofungus yaniguaensis'', named after the formation * '' |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cephalotes Hispaniolicus
''Cephalotes hispaniolicus'' is an extinct species of ant in the subfamily Myrmicinae known from a single Middle Miocene fossil found in amber on Hispaniola. At the time of description ''C. hispaniolicus'' was one of six ant species placed in the ''Cephalotes'' ''multispinosus'' clade. History and classification ''C. hispaniolicus'' was described from a solitary fossil worker caste ant which was preserved as an Inclusion (mineral), inclusion in a transparent chunk of Dominican amber. The amber was produced by the extinct tree ''Hymenaea protera'', which formerly grew on Hispaniola, across northern South America and up to southern Mexico. The specimen was collected from an unidentified amber mine in the Dominican Republic. The amber dates from the Burdigalian age of the Miocene, being recovered from sections of the La Toca Formation in the Cordillera Septentrional and the Yanigua Formation in the Cordillera Oriental (Hispaniola), Cordillera Oriental. At the time of description, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marl Formations
Marl is an earthy material rich in carbonate minerals, clays, and silt. When hardened into rock, this becomes marlstone. It is formed in marine or freshwater environments, often through the activities of algae. Marl makes up the lower part of the cliffs of Dover, and the Channel Tunnel follows these marl layers between France and the United Kingdom. Marl is also a common sediment in post-glacial lakes, such as the marl ponds of the northeastern United States. Marl has been used as a soil conditioner and neutralizing agent for acid soil and in the manufacture of cement. Description Marl or marlstone is a carbonate-rich mud or mudstone which contains variable amounts of clays and silt. The term was originally loosely applied to a variety of materials, most of which occur as loose, earthy deposits consisting chiefly of an intimate mixture of clay and calcium carbonate, formed under freshwater conditions. These typically contain 35–65% clay and 65–35% carbonate. Th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology In The Dominican Republic
Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossils to classify organisms and study their interactions with each other and their environments (their paleoecology). Paleontological observations have been documented as far back as the 5th century BC. The science became established in the 18th century as a result of Georges Cuvier's work on comparative anatomy, and developed rapidly in the 19th century. The term itself originates from Greek (, "old, ancient"), (, (gen. ), "being, creature"), and (, "speech, thought, study"). Paleontology lies on the border between biology and geology, but differs from archaeology in that it excludes the study of anatomically modern humans. It now uses techniques drawn from a wide range of sciences, including biochemistry, mathematics, and engineering. Us ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neogene Dominican Republic
The Neogene ( ), informally Upper Tertiary or Late Tertiary, is a geologic period and system that spans 20.45 million years from the end of the Paleogene Period million years ago (Mya) to the beginning of the present Quaternary Period Mya. The Neogene is sub-divided into two epochs, the earlier Miocene and the later Pliocene. Some geologists assert that the Neogene cannot be clearly delineated from the modern geological period, the Quaternary. The term "Neogene" was coined in 1853 by the Austrian palaeontologist Moritz Hörnes (1815–1868). During this period, mammals and birds continued to evolve into modern forms, while other groups of life remained relatively unchanged. The first humans (''Homo habilis'') appeared in Africa near the end of the period. Some continental movements took place, the most significant event being the connection of North and South America at the Isthmus of Panama, late in the Pliocene. This cut off the warm ocean currents from the Pacific to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Formations Of The Dominican Republic
Geology () is a branch of natural science concerned with Earth and other astronomical objects, the features or rocks of which it is composed, and the processes by which they change over time. Modern geology significantly overlaps all other Earth sciences, including hydrology, and so is treated as one major aspect of integrated Earth system science and planetary science. Geology describes the structure of the Earth on and beneath its surface, and the processes that have shaped that structure. It also provides tools to determine the relative and absolute ages of rocks found in a given location, and also to describe the histories of those rocks. By combining these tools, geologists are able to chronicle the geological history of the Earth as a whole, and also to demonstrate the age of the Earth. Geology provides the primary evidence for plate tectonics, the evolutionary history of life, and the Earth's past climates. Geologists broadly study the properties and processes o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lagunitas Formation, Cuba
The Lagunitas Formation is a geologic formation in Cuba. The open marine, fluvio- deltaic and lagoonal claystones, limestones and conglomerates preserve fossils dating back to the Early Miocene period. Among others, the fossil primate '' Paralouatta marianae'', the largest primate of the Miocene New World, was found in the formation. Based on microfossils, the age has been determined as Burdigalian. Description The type locality designated by Popov is a small outcrop located east of Trinidad, on the highway linking Trinidad and Banao. The youngest lithostratigraphic unit overlain by Lagunitas is the Oligocene Las Cuevas Formation in the type section. Lagunitas is in turn overlain by the Middle Miocene Güines Formation and younger sediments.MacPhee et al., 2003, p.6 Regional correlation Partial temporal and lithological equivalents of the Lagunitas Formation situated elsewhere in Cuba include the Arabos, Paso Real, Rosario and Magantilla Formations. In Hispaniola, t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
El Mamey Formation
The El Mamey Formation is a geologic formation in the Dominican Republic. The formation consists of shales and sandstones interspersed with a conglomerate of well-rounded pebbles, deposited in a fluvio- deltaic environment. El Mamey Formation is one of the formations containing Dominican amber and preserves fossils dating back to the Burdigalian to Langhian period. at .org Fossil content * '''' * ''[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
La Toca Formation
The La Toca Formation is a geologic formation in the northern and eastern part of the Dominican Republic. The formation, predominantly an alternating sequence of marls and turbiditic sandstones, breccias and conglomerates, is renowned for the preservation of insects and other arthropods in amber, known as Dominican amber. The formation is dated to the Burdigalian to Langhian stages of the Miocene period ( Hemingfordian in the NALMA classification). at .org Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In The Dominican Republic
The Paleobiology Database lists no known fossiliferous stratigraphic units in Dominica, Saint Kitts and Nevis, Saint Lucia, Saint Vincent and the Grenadines. The database also records no fossiliferous stratigraphic units within several regions of the Caribbean like the Archipelago of San Andrés, Providencia and Santa Catalina, Guadeloupe, Martinique, Bonaire, Saba, Sint Eustatius, and Nueva Esparta. Antigua and Barbuda The Bahamas Barbados Cuba Dominican Republic Grenada Haiti Jamaica Trinidad and Tobago Dependencies of France The Paleobiology Database lists no known fossiliferous stratigraphic units in the French dependencies of St. Barthélemy or St. Martin. Dependencies of the Netherlands The Paleobiology Database lists no known fossiliferous stratigraphic units in the Dutch dependencies of Aruba, Bonaire, Saba, Sint Eustatius and Sint Maarten. Curaçao Dependencies of the United Kingdom The Paleobiology Dat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Portunus
''Portunus'' is a genus of crab which includes several important species for fisheries, such as the blue swimming crab, ''Portunus pelagicus'' and the Gazami crab, '' P. trituberculatus''. Other species, such as the three-spotted crab ('' P. sanguinolentus'') are caught as bycatch. The genus ''Portunus'' contains more than 90 extant species and over 40 further species known only from fossils. Fossils of crabs within this genus can be found in sediment of Europe, the United States, Mexico, Venezuela, Brazil and Australia from Paleogene The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago (Mya) to the beginning of ... to recent (age range: 48.6 to 0.0 million years ago). The extant species are as follows: References {{Taxonbar, from=Q3399586 Portunoidea Paleogene genus first appearances E ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
