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Locharbriggs Sandstone Formation
The Locharbriggs Sandstone Formation is a formation of Cisuralian age ( Early Permian). It consists of a 1000 m thick sequence of very well-sorted aeolian sandstone Sandstone is a clastic sedimentary rock composed mainly of sand-sized (0.0625 to 2 mm) silicate grains. Sandstones comprise about 20–25% of all sedimentary rocks. Most sandstone is composed of quartz or feldspar (both silicates ...s, with well developed dune cross-bedding. The sandstone was used as a building stone in Dumfries, Edinburgh, Glasgow and New York (including the steps of the Statue of Liberty). References {{Reflist Permian Scotland ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cisuralian
The Cisuralian is the first Series (stratigraphy), series/Epoch (geology), epoch of the Permian. The Cisuralian was preceded by the Pennsylvanian (geology), Pennsylvanian and followed by the Guadalupian. The Cisuralian Epoch is named after the western slopes of the Ural Mountains in Russia and Kazakhstan and dates between 298.9 ± 0.15 – 272.3 ± 0.5 Mya. The Cisuralian is often synonymous with the informal terms early Permian or lower Permian. It corresponds approximately with the Wolfcampian in southwestern North America. The series saw the appearance of beetles and Fly, flies and was a relatively stable warming period of about 21 million years. Name and background The Cisuralian is the first series or epoch of the Permian. The Cisuralian was preceded by the last Pennsylvanian epoch (Gzhelian) and is followed by the Permian Guadalupian Epoch. The name "Cisuralian" was proposed in 1982, and approved by the International Subcommission on Permian Stratigraphy in 1996. The Ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Locharbriggs
Locharbriggs is a village in Dumfries and Galloway, Scotland. It is located near the Lochar Water, north-northeast of the town of Dumfries. It was one of several villages that stood on the edge of the Lochar Moss which was largely reclaimed in the 19th Century. The Locharbriggs locality (which also includes neighbouring Heathhall) had an estimated population of in 2016. Locharbriggs is known for the quarrying of distinctive red sandstone of the Locharbriggs Sandstone Formation. This has been used for buildings in towns and cities including Dumfries, Glasgow and Edinburgh. The stone has also been exported further afield, including for the construction of the steps of the Statue of Liberty The Statue of Liberty (''Liberty Enlightening the World''; French: ''La Liberté éclairant le monde'') is a List of colossal sculpture in situ, colossal neoclassical sculpture on Liberty Island in New York Harbor in New York City, in the U ... in New York. Only one quarry now remains ac ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Stewartry Group
The Stewartry Group is a geological group, a stratigraphic unit of mainly breccias and sandstones of Permian age that are found in Southern Scotland. The sequence sits unconformably either on rocks of lower Paleozoic age or Carboniferous strata. The upper boundary of this unit is everywhere erosional. Rocks of the Stewartry Group form the fill of a series of extensional basins trending NW-SE to N-S across the Southern Uplands. Stratigraphy Each of the basins has its own stratigraphy, although the main basinal fill in most cases is a thick sequence of sandstone, that passes either laterally or vertically into breccia. Thornhill Basin At its base the Thornhill Basin has a sequence of olivine basalt lavas with some interbedded breccia and sandstone, known as the Carron Basalt Formation. The lavas are overlain by either the Durisdeer Breccia Formation or the Locherben Breccia Formation. Both of these breccia formations pass laterally and upwards into aeolian sandstones of the T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Unconformity
An unconformity is a buried erosional or non-depositional surface separating two rock masses or strata of different ages, indicating that sediment deposition was not continuous. In general, the older layer was exposed to erosion for an interval of time before deposition of the younger layer, but the term is used to describe any break in the sedimentary geologic record. The significance of angular unconformity (see below) was shown by James Hutton, who found examples of Hutton's Unconformity at Jedburgh in 1787 and at Siccar Point in 1788. The rocks above an unconformity are younger than the rocks beneath (unless the sequence has been overturned). An unconformity represents time during which no sediments were preserved in a region or were subsequently eroded before the next deposition. The local record for that time interval is missing and geologists must use other clues to discover that part of the geologic history of that area. The interval of geologic time not represented is ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Paleozoic
The Paleozoic (or Palaeozoic) Era is the earliest of three geologic eras of the Phanerozoic Eon. The name ''Paleozoic'' ( ;) was coined by the British geologist Adam Sedgwick in 1838 by combining the Greek words ''palaiós'' (, "old") and ''zōḗ'' (), "life", meaning "ancient life" ). It is the longest of the Phanerozoic eras, lasting from , and is subdivided into six geologic periods (from oldest to youngest): # Cambrian # Ordovician # Silurian # Devonian # Carboniferous # Permian The Paleozoic comes after the Neoproterozoic Era of the Proterozoic Eon and is followed by the Mesozoic Era. The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared. Arthropods, molluscs, fish, amphibians, reptiles, and synapsids all evolved during the Paleozoic. Life began in the ocean ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dumfries Basin
Dumfries ( ; sco, Dumfries; from gd, Dùn Phris ) is a market town and former royal burgh within the Dumfries and Galloway council area of Scotland. It is located near the mouth of the River Nith into the Solway Firth about by road from the Anglo-Scottish border and just away from Cumbria by air. Dumfries is the county town of the historic county of Dumfriesshire. Before becoming King of Scots, Robert the Bruce killed his rival the Red Comyn at Greyfriars Kirk in the town on 10 February 1306. The Young Pretender had his headquarters here during a 3-day sojourn in Dumfries towards the end of 1745. During the Second World War, the bulk of the Norwegian Army during their years in exile in Britain consisted of a brigade in Dumfries. Dumfries is nicknamed ''Queen of the South''. This is also the name of the town's professional football club. People from Dumfries are known colloquially in Scots language as ''Doonhamers''. Toponymy There are a number of theories on the ety ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Solway Basin
North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating direction or geography. Etymology The word ''north'' is related to the Old High German ''nord'', both descending from the Proto-Indo-European unit *''ner-'', meaning "left; below" as north is to left when facing the rising sun. Similarly, the other cardinal directions are also related to the sun's position. The Latin word ''borealis'' comes from the Greek '' boreas'' "north wind, north", which, according to Ovid, was personified as the wind-god Boreas, the father of Calais and Zetes. ''Septentrionalis'' is from ''septentriones'', "the seven plow oxen", a name of '' Ursa Major''. The Greek ἀρκτικός (''arktikós'') is named for the same constellation, and is the source of the English word '' Arctic''. Other languages have other derivations. For example, in Lezgian, ''kefe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Early Permian
01 or '01 may refer to: * The year 2001, or any year ending with 01 * The month of January * 1 (number) Music * '01 (Richard Müller album), 01'' (Richard Müller album), 2001 * 01 (Son of Dave album), ''01'' (Son of Dave album), 2000 * 01 (Urban Zakapa album), ''01'' (Urban Zakapa album), 2011 * O1 (Hiroyuki Sawano album), ''O1'' (Hiroyuki Sawano album), 2015 * 01011001, the seventh studio album from Arjen Anthony Lucassen's Ayreon project Other uses * 01 (telephone number), United Kingdom internal dialing code for London between the late 1950s and 1990 * Lynk & Co 01, a compact SUV built since 2017 * Zero One also known as ''Machine City'', a city-state from the ''The Matrix (series), Matrix'' series * Kolmogorov's zero-one law, a law of probability theory * Pro Wrestling ZERO1-MAX, a wrestling promotion formerly known as Pro Wrestling ZERO-ONE * BAR 01, a Formula One chassis * The number of the French department Ain * The codename given to the Wing Gundam by Oz in the anime ''G ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sorting (geology)
Sorting describes the distribution of grain size of sediments, either in unconsolidated deposits or in sedimentary rocks. This should not be confused with crystallite size, which refers to the individual size of a crystal in a solid. Crystallite is the building block of a grain. ''Very poorly sorted'' indicates that the sediment sizes are mixed (large variance); whereas ''well sorted'' indicates that the sediment sizes are similar (low variance). The terms describing sorting in sediments – very poorly sorted, poorly sorted, moderately sorted, well sorted, very well sorted – have technical definitions and semi-quantitatively describe the amount of variance seen in particle sizes. See for details. In the field, sedimentologists use graphical charts to accurately describe the sorting of a sediment using one of these terms. The degree of sorting may also indicate the energy, rate, and/or duration of deposition, as well as the transport process (river, debris flow, wind, glacier ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
