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Blue Stone (Australia)
Bluestone is a cultural or commercial name for a number of dimension or building stone varieties, including: * basalt in Victoria, Australia, and in New Zealand * dolerites in Tasmania, Australia; and in Britain (including Stonehenge) * feldspathic sandstone in the US and Canada * limestone in the Shenandoah Valley in the US, from the Hainaut quarries in Soignies, Belgium, and from quarries in County Carlow, County Galway and County Kilkenny in Ireland * slate in South Australia Stonehenge The term "bluestone" in Britain is used in a loose sense to cover all of the "foreign," not intrinsic, stones and rock debris at Stonehenge. It is a "convenience" label rather than a geological term, since at least 46 different rock types are represented. One of the most common rocks in the assemblage is known as Preseli Spotted Dolerite—a chemically altered igneous rock containing spots or clusters of secondary minerals replacing plagioclase feldspar. It is a medium grained dark and h ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carn Menyn Bluestones - Geograph
''Carn'' is the official magazine of the Celtic League. The name, a Celtic word which has been borrowed into English as 'cairn', was chosen for its symbolic value and because it can be found in each of the living Celtic languages. The subtitle is: 'A Link Between the Celtic Nations'. Overview Founded in 1973, ''Carn'' is dedicated to highlighting and furthering the aims of the Celtic League, including language preservation and self-determination for the Six Celtic Nations. The articles are published in English, with articles also in the six Celtic languages: Breton, Cornish, Irish, Manx, Scottish Gaelic, and Welsh, with translations and summaries in English. In the past, articles have also appeared in French. Notable contributors have included the Scottish Gaelic poet Sorley MacLean. The cover of the magazine for a number of years has been a map showing the various Celtic countries, notated with their names in their respective native languages. Editors The editors ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Australia
South Australia (commonly abbreviated as SA) is a state in the southern central part of Australia. It covers some of the most arid parts of the country. With a total land area of , it is the fourth-largest of Australia's states and territories by area, and second smallest state by population. It has a total of 1.8 million people. Its population is the second most highly centralised in Australia, after Western Australia, with more than 77 percent of South Australians living in the capital Adelaide, or its environs. Other population centres in the state are relatively small; Mount Gambier, the second-largest centre, has a population of 33,233. South Australia shares borders with all of the other mainland states, as well as the Northern Territory; it is bordered to the west by Western Australia, to the north by the Northern Territory, to the north-east by Queensland, to the east by New South Wales, to the south-east by Victoria, and to the south by the Great Australian Bight.M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pentridge
Pentridge is a village and former civil parish, now in the parish of Sixpenny Handley and Pentridge, in the English county of Dorset, lying in the north-east of the county within the East Dorset administrative district. It is situated on the edge of Cranborne Chase down a dead-end minor lane just south of the A354 road between the towns of Blandford Forum (ten miles to the south-west) and Salisbury (twelve miles to the northeast). In 2001 it had a population of 215. The civil parish was abolished on 1 April 2015 and merged with Sixpenny Handley to form Sixpenny Handley and Pentridge. The village name derives from the Celtic ''pen'' ("hill") and ''twrch'' ("boar"), and thus means "hill of the wild boar"; its existence was first recorded (as "Pentric") in the eighth century, eighty years before the birth of Alfred the Great. The village is located amongst many Neolithic, Roman and Saxon earthworks, notably Bokerley Dyke, a long defensive ditch which was dug by the Romano-British ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craig Rhos-y-felin
Craig Rhos-y-felin is a rocky outcrop on the north side of the Preseli Mountains in Wales, which is designated as a RIGS site on the basis of its geological and geomorphological interest. It is accepted by some in the archaeological community that it is the site of a quarry, used together with one at Carn Goedog, for gathering stones used at Stonehenge, most notably as the source of some of the foliated rhyolite found in the Stonehenge "debitage". This is disputed by others, who believe that all of the features at the site, apart from evidence of intermittent occupation over a long period, are of natural origin. Some believe that the site was used as a quarry in both the Neolithic and Bronze Age The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second pri ...s, around 4000 to 5000 years ago, and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Boscombe Bowmen
The Boscombe Bowmen is the name given by archaeologists to a group of early Bronze Age people found in a shared burial at Boscombe Down in Amesbury () near Stonehenge in Wiltshire, England. Discovery The burials were found in 2003 during roadworks being carried out on behalf of Qinetiq, the contractor that operates the Boscombe Down military airfield. The site is near a group of houses (known as Lower Camp) in Amesbury which are associated with the airfield (which lies to the east). The burials The grave contained seven burials: three children, a teenager and three men. Analysis of the skulls suggests that the men and the teenager were related to each other. The eldest man was buried in a crouched position with the bones of the others scattered around him, and their skulls resting at his feet. They became known as the Bowmen because several flint arrowheads were placed in the grave. Other grave goods included a boar's tusk, a bone toggle, flint tools, and eight Beaker vessels; a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Irish Sea Glacier
The Irish Sea Glacier was a huge glacier during the Pleistocene Ice Age that, probably on more than one occasion, flowed southwards from its source areas in Scotland and Ireland and across the Isle of Man, Anglesey and Pembrokeshire. It probably reached its maximum extent during the Anglian Glaciation, and it was also extensive during the Late Devensian Glaciation (or Last Glacial Maximum). It was the only clearly defined major glacier in the Irish Sea and flowed about 700 km from its source areas to its southernmost margin. It is sometimes referred to as an “ice stream” since it appears to have been constrained not by ice-free land areas but by highlands which were themselves buried beneath ice. At the time of its maximum extent the glacier extended all the way to the coasts of Somerset and Cornwall, along the south coast of Ireland, and even reached the Isles of Scilly. It was forced through a relatively narrow constriction in St George's Channel by ice flowing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glacial Erratic
A glacial erratic is glacially deposited rock differing from the type of rock native to the area in which it rests. Erratics, which take their name from the Latin word ' ("to wander"), are carried by glacial ice, often over distances of hundreds of kilometres. Erratics can range in size from pebbles to large boulders such as Big Rock () in Alberta. Geologists identify erratics by studying the rocks surrounding the position of the erratic and the composition of the erratic itself. Erratics are significant because: *They can be transported by glaciers, and they are thereby one of a series of indicators which mark the path of prehistoric glacier movement. Their lithographic origin can be traced to the parent bedrock, allowing for confirmation of the ice flow route. *They can be transported by ice rafting. This allows quantification of the extent of glacial flooding resulting from ice dam failure which release the waters stored in proglacial lakes such as Lake Missoula. Erratics ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Glaciation
A glacial period (alternatively glacial or glaciation) is an interval of time (thousands of years) within an ice age that is marked by colder temperatures and glacier advances. Interglacials, on the other hand, are periods of warmer climate between glacial periods. The Last Glacial Period ended about 15,000 years ago. The Holocene is the current interglacial. A time with no glaciers on Earth is considered a greenhouse climate state. Quaternary Period Within the Quaternary, which started about 2.6 million years before present, there have been a number of glacials and interglacials. At least eight glacial cycles have occurred in the last 740,000 years alone. Penultimate Glacial Period The Penultimate Glacial Period (PGP) is the glacial period that occurred before the Last Glacial Period. It began about 194,000 years ago and ended 135,000 years ago, with the beginning of the Eemian interglacial. Last Glacial Period The last glacial period was the most recent glacial period ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wales
Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the Bristol Channel to the south. It had a population in 2021 of 3,107,500 and has a total area of . Wales has over of coastline and is largely mountainous with its higher peaks in the north and central areas, including Snowdon (), its highest summit. The country lies within the Temperateness, north temperate zone and has a changeable, maritime climate. The capital and largest city is Cardiff. Welsh national identity emerged among the Celtic Britons after the Roman withdrawal from Britain in the 5th century, and Wales was formed as a Kingdom of Wales, kingdom under Gruffydd ap Llywelyn in 1055. Wales is regarded as one of the Celtic nations. The Conquest of Wales by Edward I, conquest of Wales by Edward I of England was completed by 1283, th ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Preseli Hills
The Preseli Hills or, as they are known locally and historically, Preseli Mountains, (Welsh: ''Mynyddoedd y Preseli / Y Preselau'' , ) is a range of hills in western Wales, mostly within the Pembrokeshire Coast National Park. The range stretches from the proximity of Newport in the west to Crymych in the east, some in extent. The highest point at above sea level is Foel Cwmcerwyn. The ancient of track along the top of the range is known as the Golden Road. The Preselis have a diverse ecosystem, many prehistoric sites, and are a popular tourist destination. There are scattered settlements and small villages; the uplands provide extensive unenclosed grazing, and the lower slopes are mainly enclosed pasture. Slate quarrying was once an important industry. More recently, igneous rock is being extracted. The Preselis have Special Area of Conservation status, and there are three sites of special scientific interest (SSSIs). Name variations A peak is spelt ''Percelye'' on a 15 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
The Daily Telegraph
''The Daily Telegraph'', known online and elsewhere as ''The Telegraph'', is a national British daily broadsheet newspaper published in London by Telegraph Media Group and distributed across the United Kingdom and internationally. It was founded by Arthur B. Sleigh in 1855 as ''The Daily Telegraph & Courier''. Considered a newspaper of record over ''The Times'' in the UK in the years up to 1997, ''The Telegraph'' generally has a reputation for high-quality journalism, and has been described as being "one of the world's great titles". The paper's motto, "Was, is, and will be", appears in the editorial pages and has featured in every edition of the newspaper since 19 April 1858. The paper had a circulation of 363,183 in December 2018, descending further until it withdrew from newspaper circulation audits in 2019, having declined almost 80%, from 1.4 million in 1980.United Newspapers PLC and Fleet Holdings PLC', Monopolies and Mergers Commission (1985), pp. 5–16. Its si ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolerite
Diabase (), also called dolerite () or microgabbro, is a mafic, holocrystalline, subvolcanic rock equivalent to volcanic basalt or plutonic gabbro. Diabase dikes and sills are typically shallow intrusive bodies and often exhibit fine-grained to aphanitic chilled margins which may contain tachylite (dark mafic glass). ''Diabase'' is the preferred name in North America, while ''dolerite'' is the preferred name in the rest of the English-speaking world, where sometimes the name ''diabase'' refers to altered dolerites and basalts. Some geologists prefer to avoid confusion by using the name ''microgabbro''. The name ''diabase'' comes from the French ', and ultimately from the Greek - meaning "act of crossing over, transition". Petrography Diabase normally has a fine but visible texture of euhedral lath-shaped plagioclase crystals (62%) set in a finer matrix of clinopyroxene, typically augite (20–29%), with minor olivine (3% up to 12% in olivine diabase), magnetite (2%), and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
