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Blackbrook Reservoir Formation
The Blackbrook Reservoir Formation is a geologic formation in Leicestershire, and lies within the wider Blackbrook Reservoir Blackbrook Reservoir is a biological Site of Special Scientific Interest between Shepshed and Whitwick in Leicestershire. The reservoir was constructed in 1796 in order to feed the Charnwood Forest Canal, which has long since vanished. The firs ... area. References * {{cite web, title= Fossilworks: Gateway to the Paleobiology Database, author= ((Various Contributors to the Paleobiology Database)), url= https://www.fossilworks.org, access-date= 17 December 2021 Ediacaran Europe Geologic formations of the United Kingdom ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (geology)
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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ediacaran
The Ediacaran ( ) is a geological period of the Neoproterozoic geologic era, Era that spans 96 million years from the end of the Cryogenian Period at 635 Million years ago, Mya to the beginning of the Cambrian Period at 538.8 Mya. It is the last period of the Proterozoic geologic eon, Eon as well as the last of the so-called "Precambrian supereon", before the beginning of the subsequent Cambrian Period marks the start of the Phanerozoic Eon, where recognizable fossil evidence of life becomes common. The Ediacaran Period is named after the Ediacara Hills of South Australia, where trace fossils of a diverse community of previously unrecognized lifeforms (later named the Ediacaran biota) were first discovered by geologist Reg Sprigg in 1946. Its status as an official geological period was ratified in 2004 by the International Union of Geological Sciences (IUGS), making it the first new geological period declared in 120 years. Although the period took namesake from the Ediacara Hills ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tuff
Tuff is a type of rock made of volcanic ash ejected from a vent during a volcanic eruption. Following ejection and deposition, the ash is lithified into a solid rock. Rock that contains greater than 75% ash is considered tuff, while rock containing 25% to 75% ash is described as ''tuffaceous'' (for example, ''tuffaceous sandstone''). A pyroclastic rock containing 25–75% volcanic bombs or volcanic blocks is called tuff breccia. Tuff composed of sandy volcanic material can be referred to as volcanic sandstone. Tuff is a relatively soft rock, so it has been used for construction since ancient times. Because it is common in Italy, the Romans used it often for construction. The Rapa Nui people used it to make most of the ''moai'' statues on Easter Island. Tuff can be classified as either igneous or sedimentary rock. It is usually studied in the context of igneous petrology, although it is sometimes described using sedimentological terms. Tuff is often erroneously called t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pelite
A pelite () or metapelite is a metamorphism, metamorphosed fine-grained sedimentary rock, i.e. mudstone or siltstone. The term was earlier used by geologists to describe a clay-rich, fine-grained clastic sediment or sedimentary rock, i.e. mud or a mudstone, the metamorphosed version of which would technically have been a ''metapelite''. It was equivalent to the now little-used Latin-derived term lutite.Potter, P.E., J.B. Maynard, and P.J. Depetris (2005) ''Muds and Mudstones.'' New York, New York, Springer. 279 pp. Neuendorf, K.K.E., J.P. Mehl, Jr., and J.A. Jackson, eds. (2005) ''Glossary of Geology'' (5th ed.). Alexandria, Virginia, American Geological Institute. 779 pp. A semipelite is defined in part as having similar chemical composition but being of a crystalloblastic nature. Francis J. Pettijohn, Pettijohn (1975) gives the following descriptive terms based on grain size, avoiding the use of terms such as clay or Argillite, argillaceous which carry an implication of chemic ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackbrook Reservoir
Blackbrook Reservoir is a biological Site of Special Scientific Interest between Shepshed and Whitwick in Leicestershire. The reservoir was constructed in 1796 in order to feed the Charnwood Forest Canal, which has long since vanished. The first dam constructed was an earthworks one, and this failed on 20 February 1799. In eleven minutes the reservoir was empty and as a result local farmland was ruined, sheep were drowned, and much of Shepshed and nearby Loughborough were affected by flood waters. The dam was repaired in 1801, but the canal was no longer commercially viable. The present gravity dam was constructed in 1906 and was officially opened by the first Mayor of Loughborough Joseph Griggs. In 1957 the dam felt the effects of a magnitude 5.3 earthquake. The tremors caused heavy coping stones to shift and cracks appeared in the faces of the dam. The reservoir has a plant community on its margins which is unique in the Midlands and only found in a few northern sites. Its u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Leicestershire
Leicestershire ( ) is a Ceremonial counties of England, ceremonial county in the East Midlands of England. It is bordered by Derbyshire, Nottinghamshire and Lincolnshire to the north, Rutland to the east, Northamptonshire to the south-east, Warwickshire to the south-west, and Staffordshire to the west. The city of Leicester is the largest settlement and the county town. The county has an area of and a population of one million according to 2022 estimates. Leicester is in the centre of the county and is by far the largest settlement, with a Leicester urban area, built-up area population of approximately half a million. The remainder of the county is largely rural, and the next-largest settlements are Loughborough in the north, Hinckley in the south-west, and Wigston south-east of Leicester. For Local government in England, local government purposes Leicestershire comprises a non-metropolitan county, with seven districts, and the Unitary authorities of England, unitary authority a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
United Kingdom
The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotland, Wales and Northern Ireland. The UK includes the island of Great Britain, the north-eastern part of the island of Ireland, and most of List of islands of the United Kingdom, the smaller islands within the British Isles, covering . Northern Ireland shares Republic of Ireland–United Kingdom border, a land border with the Republic of Ireland; otherwise, the UK is surrounded by the Atlantic Ocean, the North Sea, the English Channel, the Celtic Sea and the Irish Sea. It maintains sovereignty over the British Overseas Territories, which are located across various oceans and seas globally. The UK had an estimated population of over 68.2 million people in 2023. The capital and largest city of both England and the UK is London. The cities o ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Blackbrook Group
The Blackbrook Group is a geologic group in Leicestershire, and is the oldest group of the Charnian Supergroup. It preserves fossils dating back to the Ediacaran period. It mainly contains pelite, tuff and greywacke. Formation units It is made up of two formations, and is the basal-most unit of the Charnian Supergroup. Uppermost formation within the group is the Blackbrook Reservoir Formation, tuffeceous pelite, tuffs and coarse-grained tuffs. This is underlain by the basal-most formation of the group and supergroup, the Ives Head Formation, which consists of slump breccia, coarse-grained tuffs and dust tuffs, with fine-grained and tuffeceous greywackes in the middle part of the formation, and nearer to its base are sandstones and dacite lavas. Dating Whilst no proper full zircon dating has been performed in the Blackbrook Group, some dating has returned a lower age of 611 Ma, with the top age of 569 Ma based on the base of the overlying Maplewell Group. As the group contain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Beacon Hill Formation
The Beacon Hill Formation is a geologic formation in Leicestershire, and lies within the wider Beacon Hill area. It preserves fossils dating back to the Lower Ediacaran period. Paleobiota The Beacon Hill Formation contains the oldest best preserved fossils within the Charnian Supergroup, most of which can be found in the Outwoods Member, with some found in the overlying and underlying members. Petalonamae ''incertae sedis'' Ivesheadiomorph See also * List of fossiliferous stratigraphic units in the United Kingdom *List of fossiliferous stratigraphic units in England See also * Lists of fossiliferous stratigraphic units in Europe * Lists of fossiliferous stratigraphic units in the United Kingdom References * {{DEFAULTSORT:Fossiliferous stratigraphi ... References * {{cite web, title= Fossilworks: Gateway to the Paleobiology Database, author= ((Various Contributors to the Paleobiology Database)), url= https://www.fossilworks.org, access-date= 17 De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ives Head Formation
The Ives Head Formation is a geologic formation in Leicestershire, and lies within the wider Ives Head area. It preserves fossils dating back to the Lower Ediacaran period. Paleobiota The Ives Head Formation contains the oldest fossils within the Charnian Supergroup, which can be found in the Lubcloud surface. If preliminary zircon dating is correct, then these organisms could be pre-Gaskiers in age, with the base of the formation just below them coming in at around 611 Ma, which would not only be older than current known pre-Gaskiers biota at the 580 Ma Rocky Harbour Formation in Newfoundland and Labrador, but also the 602 Ma biota at the Lantian Formation in China, which would greatly change the way we understand the evolution of the Ediacaran biota, although it has been noted that the dates require further refinement. Ivesheadiomorph See also * List of fossiliferous stratigraphic units in the United Kingdom *List of fossiliferous stratigraphic units in England ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ediacaran Europe
The Ediacaran ( ) is a geological period of the Neoproterozoic Era that spans 96 million years from the end of the Cryogenian Period at 635 Mya to the beginning of the Cambrian Period at 538.8 Mya. It is the last period of the Proterozoic Eon as well as the last of the so-called "Precambrian supereon", before the beginning of the subsequent Cambrian Period marks the start of the Phanerozoic Eon, where recognizable fossil evidence of life becomes common. The Ediacaran Period is named after the Ediacara Hills of South Australia, where trace fossils of a diverse community of previously unrecognized lifeforms (later named the Ediacaran biota) were first discovered by geologist Reg Sprigg in 1946. Its status as an official geological period was ratified in 2004 by the International Union of Geological Sciences (IUGS), making it the first new geological period declared in 120 years. Although the period took namesake from the Ediacara Hills in the Nilpena Ediacara National Park, the t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
