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Timeline Of Prehistoric Scotland
This timeline of prehistoric Scotland is a chronologically ordered list of important archaeological sites in Scotland and of major events affecting Scotland's human inhabitants and culture during the List of time periods#Prehistoric periods, prehistoric period. The period of prehistory prior to occupation by the genus ''Homo'' is part of the geology of Scotland. Prehistoric Scotland, Prehistory in Scotland ends with the Scotland during the Roman Empire, arrival of the Romans in southern Scotland in the 1st century AD and the beginning of Protohistory, written records. The archaeological sites and events listed are the earliest examples or among the most notable of their type. No traces have yet been found of either a Neanderthal presence or of ''Homo sapiens'' during the Pleistocene interglacials, the first indications of humans in Scotland occurring only after the Last glacial period, ice retreated in the 11th millennium BC. Since that time, the landscape of Scotland has been al ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dun Carloway
Dun Carloway () is a broch situated in the district of Carloway, on the west coast of the Isle of Lewis, Scotland (). It is a remarkably well preserved broch – on the east side parts of the old wall still reach to 9 metres tall. History Most brochs were built in the period from 100 BC to 100 AD. Dun Carloway was probably built in the 1st century AD.I. Armit & N. Fojut, ''Dun Charlabhaigh and the Hebridean Iron Age'' (1998). P. 10 It probably got its current name from the Norse ''Karlavagr'' ("Karl's bay"), a relic of its time as part of the Kingdom of the Isles. Through the centuries Dun Carloway remained in use until the floor level was too high due to build-up of the occupation layers.C. Tabraham''Excavations at Dun Carloway broch, Isle of Lewis'', Proc Soc Antiq Scot, 108 ( 1976-7) 156-167. The broch was occasionally used in later times as a stronghold. The Morrisons of Ness put Dun Carloway into use in 1601. The story goes that they had stolen cattle from the MacAuleys ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Orkney
Orkney (), also known as the Orkney Islands, is an archipelago off the north coast of mainland Scotland. The plural name the Orkneys is also sometimes used, but locals now consider it outdated. Part of the Northern Isles along with Shetland, Orkney is 10 miles (16 km) north of Caithness and has about 70 islands, of which 20 are inhabited.Haswell-Smith (2004) pp. 336–403. The largest island, the Mainland, Orkney, Mainland, has an area of , making it the List of islands of Scotland, sixth-largest Scottish island and the List of islands of the British Isles, tenth-largest island in the British Isles. Orkney's largest settlement, and also its administrative centre, is Kirkwall. Orkney is one of the 32 Subdivisions of Scotland, council areas of Scotland, as well as a Orkney (Scottish Parliament constituency), constituency of the Scottish Parliament, a Lieutenancy areas of Scotland, lieutenancy area, and an counties of Scotland, historic county. The local council is Orkney I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hypoxia (environmental)
Hypoxia (''hypo'': 'below', ''oxia'': 'oxygenated') refers to low oxygen conditions. Hypoxia is problematic for air-breathing organisms, yet it is essential for many anaerobic organisms. Hypoxia applies to many situations, but usually refers to the atmosphere and natural waters. Atmospheric hypoxia Atmospheric hypoxia occurs naturally at high altitudes. Total atmospheric pressure decreases as altitude increases, causing a lower partial pressure of oxygen, which is defined as hypobaric hypoxia. Oxygen remains at 20.9% of the total gas mixture, differing from hypoxic hypoxia, where the percentage of oxygen in the air (or blood) is decreased. This is common in the sealed burrows of some subterranean animals, such as blesmols. Atmospheric hypoxia is also the basis of altitude training, which is a standard part of training for elite athletes. Several companies mimic hypoxia using normobaric artificial atmosphere. Aquatic hypoxia An aquatic system lacking dissolved oxygen (0% ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acid
An acid is a molecule or ion capable of either donating a proton (i.e. Hydron, hydrogen cation, H+), known as a Brønsted–Lowry acid–base theory, Brønsted–Lowry acid, or forming a covalent bond with an electron pair, known as a Lewis acid. The first category of acids are the proton donors, or Brønsted–Lowry acid–base theory, Brønsted–Lowry acids. In the special case of aqueous solutions, proton donors form the hydronium ion H3O+ and are known as Acid–base reaction#Arrhenius theory, Arrhenius acids. Johannes Nicolaus Brønsted, Brønsted and Martin Lowry, Lowry generalized the Arrhenius theory to include non-aqueous solvents. A Brønsted–Lowry or Arrhenius acid usually contains a hydrogen atom bonded to a chemical structure that is still energetically favorable after loss of H+. Aqueous Arrhenius acids have characteristic properties that provide a practical description of an acid. Acids form aqueous solutions with a sour taste, can turn blue litmus red, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Peat
Peat is an accumulation of partially Decomposition, decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, Moorland, moors, or muskegs. ''Sphagnum'' moss, also called peat moss, is one of the most common components in peat, although many other plants can contribute. The biological features of sphagnum mosses act to create a habitat aiding peat formation, a phenomenon termed 'habitat manipulation'. Soils consisting primarily of peat are known as histosols. Peat forms in wetland conditions, where flooding or stagnant water obstructs the flow of oxygen from the atmosphere, slowing the rate of decomposition. Peat properties such as organic matter content and saturated hydraulic conductivity can exhibit high spatial heterogeneity. Peatlands, particularly bogs, are the primary source of peat; although less common, other wetlands, including fens, pocosins and peat swamp forests, also deposit peat. Landscapes covered in peat are home to sp ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Disturbance (archaeology)
A disturbance is any change to an archaeological site due to events which occurred after the site was laid down. Disturbances may be caused by natural events or human activity, and may result in loss of archaeological value. In some cases, it can be difficult to distinguish between features caused by human activity in the period of interest, and features caused by later human activity or natural processes. Causes Natural causes The soil science, soil scientist Francis D. Hole identified nine natural processes resulting in soil disturbance, including the movements of animals and plants (known as bioturbation, and including burrowing, root growth and tree uprooting, treefalls); freezing and thawing; movement under gravity (including earthflow and rockslides); swelling and shrinking of clays; the actions of wind and water; the growth and dissolution of salt crystals; and movement caused by earthquakes. Different sites are subject to different degrees, combinations, and interactio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Highlands And Islands
The Highlands and Islands is an area of Scotland broadly covering the Scottish Highlands, plus Orkney, Shetland, and the Outer Hebrides (Western Isles). The Highlands and Islands are sometimes defined as the area to which the Crofters' Act of 1886 applied. This area consisted of eight counties of Scotland: * Argyll * Caithness * Inverness * Nairn * Orkney * Ross and Cromarty * Shetland * Sutherland Highlands and Islands Enterprise (HIE) uses a broader definition also used at Eurostat's NUTS level 2, and there has been a Highlands and Islands electoral region of the Scottish Parliament since 1999. In '' Highlands and Islands Fire and Rescue Service'' the name refers to the local government areas ( council areas) of Highland, Orkney, Shetland and the Western Isles. ''Northern'', as in '' Northern Constabulary'', is also used to refer to this area. As of early 2021, Police Scotland operated six Command Areas in Highlands and Islands: North Highland, Inverness, South High ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raised Beach
A raised beach, coastal terrace,Pinter, N (2010): 'Coastal Terraces, Sealevel, and Active Tectonics' (educational exercise), from 2/04/2011/ref> or perched coastline is a relatively flat, horizontal or gently inclined surface of marine origin,Pirazzoli, PA (2005a): 'Marine Terraces', in Schwartz, ML (ed) ''Encyclopedia of Coastal Science.'' Springer, Dordrecht, pp. 632–633 mostly an old abrasion platform which has been lifted out of the sphere of wave activity (sometimes called "tread"). Thus, it lies above or under the current sea level, depending on the time of its formation.Strahler AH; Strahler AN (2005): ''Physische Geographie.'' Ulmer, Stuttgart, 686 p.Leser, H (ed)(2005): ‚''Wörterbuch Allgemeine Geographie.'' Westermann&Deutscher Taschenbuch Verlag, Braunschweig, 1119 p. It is bounded by a steeper ascending slope on the landward side and a steeper descending slope on the seaward side (sometimes called "riser"). Due to its generally flat shape, it is often used for ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Isostasy
Isostasy (Greek wikt:ἴσος, ''ísos'' 'equal', wikt:στάσις, ''stásis'' 'standstill') or isostatic equilibrium is the state of gravity, gravitational mechanical equilibrium, equilibrium between Earth's crust (geology), crust (or lithosphere) and mantle (geology), mantle such that the crust (geology), crust "floats" at an elevation that depends on its thickness and density. This concept is invoked to explain how different topographic heights can exist at Earth's surface. Although originally defined in terms of continental crust and mantle, it has subsequently been interpreted in terms of lithosphere and asthenosphere, particularly with respect to oceanic island volcanoes, such as the Hawaiian Islands. Although Earth is a dynamic system that responds to loads in many different ways, isostasy describes the important limiting case in which crust and mantle are in static equilibrium. Certain areas (such as the Himalayas and other convergent margins) are not in isostatic equili ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dogger Bank
Dogger Bank ( Dutch: ''Doggersbank'', German: ''Doggerbank'', Danish: ''Doggerbanke'') is a large sandbank in a shallow area of the North Sea about off the east coast of England. During the last ice age, the bank was part of a large landmass connecting mainland Europe and the British Isles, now known as Doggerland. It has long been known by fishermen to be a productive fishing bank; it was named after the '' doggers'', medieval Dutch fishing boats especially used for catching cod. At the beginning of the 21st century, the area was identified as a potential site for a UK round 3 wind farm, being developed as Dogger Bank Wind Farm. Name The name Dogger Bank was first recorded in the mid-17th century. It is probably derived from the word "'' dogger''" used for a two-masted boat of the type that trawled for fish in the area in medieval times. The area has similar names in Dutch, German, Swedish, and Danish. Geography The bank extends over about , and is about in exte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Anno Domini
The terms (AD) and before Christ (BC) are used when designating years in the Gregorian calendar, Gregorian and Julian calendar, Julian calendars. The term is Medieval Latin and means "in the year of the Lord" but is often presented using "our Lord" instead of "the Lord", taken from the full original phrase "", which translates to "in the year of our Lord Jesus Christ". The form "BC" is specific to English language, English, and equivalent abbreviations are used in other languages: the Latin (language), Latin form, rarely used in English, is (ACN) or (AC). This calendar era takes as its epoch (date reference), epoch the traditionally reckoned year of the annunciation, conception or Nativity of Jesus, birth of Jesus. Years ''AD'' are counted forward since that epoch and years ''BC'' are counted backward from the epoch. There is no year zero in this scheme; thus the year AD 1 immediately follows the year 1 BC. This dating system was devised in 525 by Dionysius Exiguus but was ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
North Sea
The North Sea lies between Great Britain, Denmark, Norway, Germany, the Netherlands, Belgium, and France. A sea on the European continental shelf, it connects to the Atlantic Ocean through the English Channel in the south and the Norwegian Sea in the north. It is more than long and wide, covering . It hosts key north European shipping lanes and is a major fishery. The coast is a popular destination for recreation and tourism in bordering countries, and a rich source of energy resources, including wind energy, wind and wave power. The North Sea has featured prominently in geopolitical and military affairs, particularly in Northern Europe, from the Middle Ages to the modern era. It was also important globally through the power northern Europeans projected worldwide during much of the Middle Ages and into the modern era. The North Sea was the centre of the Viking Age, Vikings' rise. The Hanseatic League, the Dutch Golden Age, Dutch Republic, and Kingdom of Great Britain, Brita ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
