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Springvale Formation
The Springvale Formation is a geologic formation in Trinidad and Tobago. It preserves fossils dating back to the Late Miocene period. Fossil content Among others, the formation has provided fossils of: * ''Hindsiclava consors'' * '' Plagioscion ultimus''Aguilera et al., 2016 See also * List of fossiliferous stratigraphic units in Trinidad and Tobago 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 t ... References Bibliography * {{Cite journal, author1=Orangel A. Aguilera , author2=Werner Schwarzhans , author3=Philippe Béarez , year=2016 , title=Otoliths of the Sciaenidae from the Neogene of tropical America , journal=Palaeo Ichthyologica , volume=14 , pages=7–90 Geologic formations of Trinidad and Tobago Neogene Trinidad and Tobago Paleontology in Trinidad and Toba ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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] |
Hindsiclava Consors
''Hindsiclava consors'' is a species of sea snail, a marine gastropod mollusk in the family Pseudomelatomidae, the turrids, and allies.MolluscaBase (2018). Hindsiclava consors (Sowerby I, 1850). Accessed through: World Register of Marine Species at: http://www.marinespecies.org/aphia.php?p=taxdetails&id=532905 on 2018-09-16 Description The length of the shell attains 40 mm. Distribution This marine species occurs off the coast of Venezuela. Fossils have been found in the Gurabo Formation, Santo Domingo, and in the Bowden Formation, Jamaica; Springvale Formation The Springvale Formation is a geologic formation in Trinidad and Tobago. It preserves fossils dating back to the Late Miocene period Period may refer to: Common uses * Era, a length or span of time * Full stop (or period), a punctuation mark ..., Trinidad; Punta Gavilan Formation, Venezuela; Limon Formation, Costa Rica, and in the Gatun Formation, Costa Rica, and Panama. References External links Pet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Shale Formations
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, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especially quartz and calcite.Blatt, Harvey and Robert J. Tracy (1996) ''Petrology: Igneous, Sedimentary and Metamorphic'', 2nd ed., Freeman, pp. 281–292 Shale is characterized by its tendency to split into thin layers ( laminae) less than one centimeter in thickness. This property is called '' fissility''. Shale is the most common sedimentary rock. The term ''shale'' is sometimes applied more broadly, as essentially a synonym for mudrock, rather than in the more narrow sense of clay-rich fissile mudrock. Texture Shale typically exhibits varying degrees of fissility. Because of the parallel orientation of clay mineral flakes in shale, it breaks into thin layers, often splintery and usually parallel to the otherwise indistinguishable bedding ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleontology In Trinidad And Tobago
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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Neogene Trinidad And Tobago
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 t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geologic Formations Of Trinidad And Tobago
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 of Ear ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Fossiliferous Stratigraphic Units In Trinidad And Tobago
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] |
Plagioscion Ultimus
''Plagioscion'' is a genus of hardheads, ray-finned fish in the family Sciaenidae. They are found in tropical and subtropical South America where they inhabit fresh and brackish waters. Some species (notably ''P. squamosissimus'' and ''P. surinamensis'') are important food fish and support major fisheries. Depending on the exact species, they reach up to about in length. In general, the various species are similar and are not easily separated by meristics or colour. ''Plagioscion'' sometimes occur in schools. They are predators and the adults are essentially piscivorous. The largest in the genus, ''P. squamosissimus'', mainly feeds on fish smaller than , but may take ones up to about 60% of the length of the ''Plagioscion'' itself. Although the family Sciaenidae primarily is marine, there are four genera with freshwater species in South America. In addition to ''Plagioscion'', this is '' Pachypops'', '' Pachyurus'' and '' Petilipinnis''. Species FishBase currently recognizes ... [...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, 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] |
Late Miocene
The Late Miocene (also known as Upper Miocene) is a sub-epoch of the Miocene Epoch made up of two stages. The Tortonian and Messinian stages comprise the Late Miocene sub-epoch, which lasted from 11.63 Ma (million years ago) to 5.333 Ma. The evolution of life The gibbons (family Hylobatidae) and orangutans (genus ''Pongo'') are the first groups to split from the line leading to the hominins, including humans, then gorillas (genus ''Gorilla''), and finally, chimpanzees and bonobo The bonobo (; ''Pan paniscus''), also historically called the pygmy chimpanzee and less often the dwarf chimpanzee or gracile chimpanzee, is an endangered great ape and one of the two species making up the genus '' Pan,'' the other being the co ...s (genus '' Pan''). The splitting date between hominin and chimpanzee lineages is placed by some between 4 to 8 million years ago, that is, during the Late Miocene. References External links GeoWhen Database - Late Miocene .03 03 * * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Period (geology)
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 precisely ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fossils
A fossil (from Classical Latin , ) is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants. The totality of fossils is known as the ''fossil record''. Paleontology is the study of fossils: their age, method of formation, and evolutionary significance. Specimens are usually considered to be fossils if they are over 10,000 years old. The oldest fossils are around 3.48 billion years old to 4.1 billion years old. Early edition, published online before print. The observation in the 19th century that certain fossils were associated with certain rock strata led to the recognition of a geological timescale and the relative ages of different fossils. The development of radiometric dating techniques in the early 20th century allowed scientists to quantitatively measure the ab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
