|
Mynydd Machen
Mynydd Machen or Machen Mountain is a hill lying between the town of Risca and the village of Machen in Caerphilly County Borough in south Wales. Its summit is crowned by a trig point and a mast. Geology The hill lies at the southeastern extremity of the South Wales Coalfield where the varied Carboniferous Period rock strata of the coalfield margin are tilted steeply northwestwards into the coalfield basin. The sequence which outcrops on Mynydd Machen in northeast-southwest aligned bands is this (oldest at base): Warwickshire Group :*Pennant Sandstone Formation ::*Brithdir Member ::*Rhondda member ::*Deri Member South Wales Coal Measures Group :*South Wales Middle Coal Measures Formation :*South Wales Lower Coal Measures Formation Marros Group :*Bishopston Mudstone Formation :*Twrch Sandstone Formation Pembroke Limestone Group The summit of the hill is formed from the sandstone of the ‘Brithdir Member’ of the Pennant Sandstone Formation. A large quarry towards the sou ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Marilyn (hill)
This is a list of Marilyn hills and mountains in the United Kingdom, Isle of Man and Republic of Ireland, Ireland by height. Lists of mountains and hills in the British Isles#Marilyns, Marilyns are defined as peaks with a topographic prominence, prominence of or more, regardless of height or any other merit (e.g. topographic isolation, as used in Lists of mountains and hills in the British Isles#Munros, Munros). Thus, Marilyns can be mountains, with a height above , or relatively small hills. there were 2,011 recorded Marilyns. Definition The Marilyn classification was created by Alan Dawson in his 1992 book ''The Relative Hills of Britain''. The name Marilyn was coined by Dawson as a punning contrast to the ''Munro'' classification of Scottish mountains above , but which has no explicit prominence threshold, being homophonous with (Marilyn) ''Marilyn Monroe, Monroe''. The list of Marilyns was extended to Ireland by Clem Clements. Marilyn was the first of several subsequen ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
South Wales Coal Measures Group
The South Wales Coal Measures Group is a lithostratigraphy, lithostratigraphical group (stratigraphy), term referring to the coal-bearing succession of rock stratum, strata which occur in South Wales within the Westphalian (stage), Westphalian stage (stratigraphy), Stage of the Carboniferous period (geology), Period. The Group name is also applied to rocks of similar age across southern England from the Bristol Coalfield east to the concealed Oxfordshire Coalfield, Oxfordshire, Berkshire Coalfield, Berkshire and Kent Coalfields. In formal use, the term replaces the earlier Coal Measures Group The Group comprises the: :* South Wales Upper Coal Measures Formation :* South Wales Middle Coal Measures Formation :* South Wales Lower Coal Measures Formation The term 'Productive Coal Measures' was formerly used for this succession. Note that, other than a 0-30m thick sequence immediately above the ''Cambriense'' Marine Band, the South Wales rock sequence which had formerly been assigned t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Countryside And Rights Of Way Act 2000
The Countryside and Rights of Way Act 2000 (c. 37), known informally as the CRoW Act or "Right to Roam" Act is a United Kingdom Act of Parliament affecting England and Wales which came into force on 30 November 2000. Right to roam The Act implements the so-called "right to roam" (also known as ''jus spatiandi'') long sought by the Ramblers' Association and its predecessors, on certain upland and uncultivated areas of England and Wales. This element of the act was implemented in stages as conclusive maps of different regions were produced. The act refers to areas of 'mountain, moor, heath and down' in addition to registered common land; not all uncultivated land is covered. Rights of way A staged review of public rights of way, including limited rights to create new public footpaths where needed, is being conducted under the Act. Again, this is being conducted in a staged manner, which can produce anomalies – of the two administrative areas of the County of Gloucestershir ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Freedom To Roam
The freedom to roam, or "everyman's right", is the general public's right to access certain public or privately owned land, lakes, and rivers for recreation and exercise. The right is sometimes called the right of public access to the wilderness or the "right to roam". In Scotland, Finland, Iceland, Norway, Sweden, Estonia, Latvia, Lithuania, Belarus, Austria, Czech Republic and Switzerland, the freedom to roam takes the form of general public rights which are sometimes codified in law. The access is ancient in parts of Northern Europe and has been regarded as sufficiently basic that it was not formalised in law until modern times. However, the right usually does not include any substantial economic exploitation, such as hunting or logging, or disruptive activities, such as making fires and driving offroad vehicles. In countries without such general rights, there may be a network of rights of way, or some nature reserves with footpaths. Europe Nordic countries Ancient traces p ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Raven Walk
A raven is any of several larger-bodied bird species of the genus ''Corvus''. These species do not form a single taxonomic group within the genus. There is no consistent distinction between "crows" and "ravens", common names which are assigned to different species chiefly on the basis of their size. The largest raven species are the common raven and the thick-billed raven. Etymology The term "raven" originally referred to the common raven (''Corvus corax''), the type species of the genus ''Corvus'', which has a larger distribution than any other species of ''Corvus'', ranging over much of the Northern Hemisphere. The modern English word ''raven'' has cognates in all other Germanic languages, including Old Norse (and subsequently modern Icelandic) and Old High German , all of which descend from Proto-Germanic . Collective nouns for a group of ravens (or at least the common raven) include "rave", "treachery", "unkindness" and "conspiracy". In practice, most people use the more ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sirhowy Valley Walk
Sirhowy () is a village in the Sirhowy Valley () and the county of Blaenau Gwent. It is located north east of Tredegar, north west of Ebbw Vale, and north west of Newport. The A4048 runs near the village. Tourism The area is also known as a popular rock climbing site due to the geology of the area offering "one of the best chunks of quarried sandstone in the area". UK Climbing describe this as providing a "brilliant line-up of fingery wall climbs" and "plenty of excellent (slightly) easier climbing on some of the best rock around." History The Gwent Heritage voluntary group have extensively documented the history of the area as far back as its mining establishment. The group's branch meets regularly to contribute to the collection of materials covering the region. The Sirhowy River flows past the west of the village. Ironworks The ironworks established in the village were first established in 1778 operated by William Borrow, Rev. Matthew Monkhouse and Richard Foth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhymney Valley Ridgeway Walk
The Rhymney Valley Ridgeway Walk is a waymarked long distance footpath in the UK forming a circular walk in the Rhymney Valley area of South Wales.Rhymney Valley Ridgeway Walk - Long Distance Walker's Association accessed 1 November 2013 accessed 1 November 2013. Distance The Rhymney Valley Ridgeway Walk is approximately 45 kilometres (~28 miles) long.Route The walk route starts at and heads south down the |
Rights Of Way In England And Wales
In England and Wales, other than in the 12 Inner London London boroughs, boroughs and the City of London, the right of way is a legally protected right of the public to pass and re-pass on specific paths. The law in England and Wales differs from Scots law in that rights of way exist only where they are so designated (or are able to be designated if not already), whereas in Scotland any route that meets certain conditions is rights of way in Scotland, defined as a right of way, and in addition, there is a general presumption of access to the countryside ("right to roam"). Private rights of way or easements also exist (see also Highways in England and Wales). Inner London Definitive maps of public rights of way have been compiled for all of England and Wales, as a result of the National Parks and Access to the Countryside Act 1949, except the 12 Inner London boroughs, which, along with the City of London, were not covered by the Act. Definitive maps exist for the Outer London bo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Limestone
Limestone ( calcium carbonate ) is a type of carbonate sedimentary rock which is the main source of the material lime. It is composed mostly of the minerals calcite and aragonite, which are different crystal forms of . Limestone forms when these minerals precipitate out of water containing dissolved calcium. This can take place through both biological and nonbiological processes, though biological processes, such as the accumulation of corals and shells in the sea, have likely been more important for the last 540 million years. Limestone often contains fossils which provide scientists with information on ancient environments and on the evolution of life. About 20% to 25% of sedimentary rock is carbonate rock, and most of this is limestone. The remaining carbonate rock is mostly dolomite, a closely related rock, which contains a high percentage of the mineral dolomite, . ''Magnesian limestone'' is an obsolete and poorly-defined term used variously for dolomite, for limes ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dolomite (rock)
Dolomite (also known as dolomite rock, dolostone or dolomitic rock) is a sedimentary carbonate rock that contains a high percentage of the mineral dolomite, CaMg(CO3)2. It occurs widely, often in association with limestone and evaporites, though it is less abundant than limestone and rare in Cenozoic rock beds (beds less than about 66 million years in age). The first geologist to distinguish dolomite rock from limestone was Belsazar Hacquet in 1778. Most dolomite was formed as a magnesium replacement of limestone or of lime mud before lithification. The geological process of conversion of calcite to dolomite is known as dolomitization and any intermediate product is known as dolomitic limestone. The "dolomite problem" refers to the vast worldwide depositions of dolomite in the past geologic record in contrast to the limited amounts of dolomite formed in modern times. Recent research has revealed sulfate-reducing bacteria living in anoxic conditions precipitate dolomite which ind ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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) because they are the most resistant minerals to weathering processes at the Earth's surface. Like uncemented sand, sandstone may be any color due to impurities within the minerals, but the most common colors are tan, brown, yellow, red, grey, pink, white, and black. Since sandstone beds often form highly visible cliffs and other topographic features, certain colors of sandstone have been strongly identified with certain regions. Rock formations that are primarily composed of sandstone usually allow the percolation of water and other fluids and are porous enough to store large quantities, making them valuable aquifers and petroleum reservoirs. Quartz-bearing sandstone can be changed into quartzite through metamorphism, usually related to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pembroke Limestone Group
The Pembroke Limestone Group is a stratigraphic unit of Courceyan to Brigantian age (Early Carboniferous) found in southern Wales and northern Somerset. It forms part of the Carboniferous Limestone Supergroup. These carbonate rocks developed in platform and ramp environments and are up to 1025m thick in places. The make-up of the Group varies from one part of the basin to another but in south Pembrokeshire it comprises the following formations: *Oystermouth Formation *Oxwich Head Limestone Formation *Stackpole Limestone Formation *Pen-y-Holt Limestone Formation *Hobbyhorse Bay Limestone Formation *Linney Head Formation *Berry Slade Limestone Formation *Black Rock Limestone Subgroup In the Tenby, Gower and Vale of Glamorgan areas, the Stackpole Formation is replaced by the Hunt's Bay Oolite Subgroup which consists of a lower/earlier Cornelly Oolite Formation and an upper/later Stormy Limestone Formation. Likewise the Linney Head to Pen-y-Holt sequence is replaced by a triparti ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Saunders_Quarry-1.jpg "Click for more on -> Sandstone")