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Afon Pyrddin
The Afon Pyrddin is a river forming a short section of the boundary between Powys and Neath Port Talbot in Wales, United Kingdom. It also forms a part of the boundary of the Brecon Beacons National Park. The river and its waterfalls are one of the key attractions of the Fforest Fawr Geopark designated in 2005. The name could mean 'river by the striking fortress' or 'sweet-flowing river'. The streams of Nant y Bryn, Nant y Fedwen and Nant Hir come together to form the Pyrddin which flows south-eastwards for 3 miles (5 km) to its confluence with the Nedd Fechan (sometimes also known historically in an Englished form "Neath Vaughan"; at one time this would have been a fair indication of the Welsh pronunciation in English spelling, but with changes in English pronunciation it has now diverged considerably)). Waterfalls The Pyrddin is best known for two spectacular waterfalls, Sgwd Gwladus (sometimes 'Gwladys') and Sgwd Einion Gam, meaning the 'fall of Gwladus' and the 'fal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
River
A river is a natural stream of fresh water that flows on land or inside Subterranean river, caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the water cycle, the processes by which water moves around the Earth. Water first enters rivers through precipitation, whether from rainfall, the Runoff (hydrology), runoff of water down a slope, the melting of glaciers or snow, or seepage from aquifers beneath the surface of the Earth. Rivers flow in channeled watercourses and merge in confluences to form drainage basins, or catchments, areas where surface water eventually flows to a common outlet. Rivers have a great effect on the landscape around them. They may regularly overflow their Bank (geography), banks and flood the surrounding area, spreading nutrients to the surrounding area. Sedime ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fault (geology)
In geology, a fault is a Fracture (geology), planar fracture or discontinuity in a volume of Rock (geology), rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust (geology), crust result from the action of Plate tectonics, plate tectonic forces, with the largest forming the boundaries between the plates, such as the megathrust faults of subduction, subduction zones or transform faults. Energy release associated with rapid movement on active faults is the cause of most earthquakes. Faults may also displace slowly, by aseismic creep. A ''fault plane'' is the Plane (geometry), plane that represents the fracture surface of a fault. A ''fault trace'' or ''fault line'' is a place where the fault can be seen or mapped on the surface. A fault trace is also the line commonly plotted on geological maps to represent a fault. A ''fault zone'' is a cluster of parallel faults. However, the term is also used for the zone ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rivers Of The Brecon Beacons National Park
A river is a natural stream of fresh water that flows on land or inside caves towards another body of water at a lower elevation, such as an ocean, lake, or another river. A river may run dry before reaching the end of its course if it runs out of water, or only flow during certain seasons. Rivers are regulated by the water cycle, the processes by which water moves around the Earth. Water first enters rivers through precipitation, whether from rainfall, the runoff of water down a slope, the melting of glaciers or snow, or seepage from aquifers beneath the surface of the Earth. Rivers flow in channeled watercourses and merge in confluences to form drainage basins, or catchments, areas where surface water eventually flows to a common outlet. Rivers have a great effect on the landscape around them. They may regularly overflow their banks and flood the surrounding area, spreading nutrients to the surrounding area. Sediment or alluvium carried by rivers shapes the landscape aro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fforest Fawr
Fforest Fawr (, ) is an extensive upland area in the county of Powys, Wales. Formerly known as the Great Forest of Brecknock in English, it was a royal hunting area for several centuries but is now used primarily for sheep grazing, forestry, water catchment and recreation. It lies within the Brecon Beacons National Park. Extent The area extends from the edge of the Black Mountain (range), Black Mountain in the west eastwards to the A470 road, A470 Brecon to Merthyr Tydfil road, just west of the Brecon Beacons themselves. It includes the peaks of Fan Fawr (734 m), Fan Frynych (629 m), Craig Cerrig-gleisiad (629 m), Fan Llia (632 m), Fan Nedd (663 m), Fan Gyhirych (725 m), Fan Bwlch Chwyth (603 m) and Cefn Cul (562 m). Traditionally Fforest Fawr also included the peaks of Fan Hir and Fan Brycheiniog, although the modern recreational use of the name tends to be restricted to the area east of the Black Mountain of which they form a part. Geology The area is largely underlain b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waterfall Country (Wales)
Waterfall Country (or sometimes Waterfalls Country) (Welsh: ''Bro'r Sgydau'') is a name often given to the upper reaches of the Vale of Neath in South Wales. The tourist area around the head of the valley has an unusually large number of publicly accessible waterfalls. The area is not officially defined but generally includes the group of falls on the Nedd Fechan, Afon Pyrddin, Pyrddin, Afon Hepste, Hepste and Afon Mellte, Mellte rivers, all of which lie between the villages of Pontneddfechan and Ystradfellte in the Brecon Beacons National Park. Each of these falls lies within or on the boundary of the county of Powys. A few miles further west are Henrhyd Falls on the Nant Llech, a tributary of the Tawe and to the south-west are Melin Court Falls on the Melin Court Brook, a tributary of the River Neath. These, along with Aberdulais Falls on the River Dulais, Dulais, a further tributary of the Neath are also encompassed by the term 'Waterfall/s Country' by some writers. Collectiv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Special Area Of Conservation
A special area of conservation (SAC) is defined in the European Union's Habitats Directive (92/43/EEC), also known as the ''Directive on the Conservation of Natural Habitats and of Wild Fauna and Flora''. They are to protect the 220 habitats and approximately 1,000 species listed in annex I and II of the directive which are considered to be of European interest following criteria given in the directive. They must be chosen from the Site of Community Importance, sites of Community importance by the member states and designated SAC by an act assuring the conservation measures of the natural habitat. SACs complement special protection areas and together form a network of protected sites across the European Union called Natura 2000. This, in turn, is part of the Emerald network of Area of Special Conservation Interest, Areas of Special Conservation Interest (ASCIs) under the Convention on the conservation of European wildlife and natural habitats, Berne Convention. Assessment methodol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Site Of Special Scientific Interest
A Site of Special Scientific Interest (SSSI) in Great Britain, or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland, is a conservation designation denoting a protected area in the United Kingdom and Isle of Man. SSSI/ASSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in the United Kingdom are based upon them, including national nature reserve (United Kingdom), national nature reserves, Ramsar Convention, Ramsar sites, Special Protection Areas, and Special Area of Conservation, Special Areas of Conservation. The acronym "SSSI" is often pronounced "triple-S I". Selection and conservation Sites notified for their Biology, biological interest are known as Biological SSSIs (or ASSIs), and those notified for geological or Physical geography, physiographic interest are Geological SSSIs (or ASSIs). Sites may be divided into management units, with some a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bryophytes
Bryophytes () are a group of land plants ( embryophytes), sometimes treated as a taxonomic division referred to as Bryophyta '' sensu lato'', that contains three groups of non-vascular land plants: the liverworts, hornworts, and mosses. In the strict sense, the division Bryophyta consists of the mosses only. Bryophytes are characteristically limited in size and prefer moist habitats although some species can survive in drier environments. The bryophytes consist of about 20,000 plant species. Bryophytes produce enclosed reproductive structures ( gametangia and sporangia), but they do not produce flowers or seeds. They reproduce sexually by spores and asexually by fragmentation or the production of gemmae. Though bryophytes were considered a paraphyletic group in recent years, almost all of the most recent phylogenetic evidence supports the monophyly of this group, as originally classified by Wilhelm Schimper in 1879. The term ''bryophyte'' comes . Features The defining ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afon Hepste
Afon Hepste () is a river in Powys, Wales, though partly forming the county's border with Rhondda Cynon Taf. It runs wholly within the Brecon Beacons National Park. Its headwaters, the Afon y Waun, Nant y Cwrier and Nant Hepste Fechan, rise on the Old Red Sandstone dip-slopes of Fforest Fawr and combine to form the Afon Hepste near the farmstead of Hepste Fechan. It enters onto the Carboniferous Limestone outcrop near this point and sections of its course downstream remain dry in all but flood conditions as the flow disappears underground. The river flows over the Millstone Grit outcrop from some way beyond Hepste Bridge.British Geological Survey 1:50,000 map no 231 'Merthyr Tydfil' & accompanying memoir The Hepste plunges over a band of resistant gritstone to form Sgwd yr Eira (translated from Welsh as 'fall of snow'). A public footpath runs behind this fall, making it one of the most popular destinations in an area that has become known as Waterfall Country. One mile d ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afon Mellte
The River Mellte (; ) is a river in south Wales. It is formed by the confluence of the Afon Llia and the Afon Dringarth. It then flows south through the village of Ystradfellte to Pontneddfechan where it joins with the Nedd Fechan to become the River Neath (). The river derives its name from 'mellt' - the Welsh word for 'lightning' - after its tendency to rise and fall rapidly in response to heavy rainfall. Underground section The entire river runs underground for 1/2 km at Porth yr Ogof as it crosses the Carboniferous Limestone outcrop. It resurges at Pwll Glas. There are fifteen known entrances to the cave system. It is a complex maze of passageways, large and small, mostly developed along one or two major bedding planes. In extreme flood conditions the entire cave can flood to the roof. It is used heavily by school and adventure groups though sections of the cave can be hazardous for the unwary. There have been a number of fatalities over the years. Wate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Farewell Rock
The Farewell Rock is the name given to a series of sandstones at the boundary of the Coal Measures with the underlying Marros Group in South Wales. Once thought to be a single sandstone, it is now accepted that the same name has been applied to several different sandstones of similar age across the South Wales Coalfield. The sandstone unit known as the Farewell Rock in the Pembrokeshire Coalfield is continuous with the Cumbriense Quartzite of the main South Wales Coalfield. These are assigned to the uppermost part of the Marros Group (the former Millstone Grit Series) which is of Namurian age. In the South Wales Coalfield, the name is given to a thicker, overlying (and hence younger) sandstone unit which, though formerly assigned to the Millstone Grit Series, is now assigned to the Lower Coal Measures which are of Westphalian age. The name is said to have been coined by ironstone miners who once worked the siderite deposits which stratigraphically overlie this rock unit. Diggi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pontneddfechan
; ; also known as Pontneathvaughan) is a village in Powys, Wales. It is the southernmost village in the historic county of Brecknockshire, within the Vale of Neath and in the community of Ystradfellte. It stands at the confluence of the rivers Mellte and Nedd Fechan ("Neath Vaughan") and gives access to a series of waterfalls that adorn the upper Neath valley. Dinas Rock is a quarried limestone promontory east of the village, popular with visitors. History District industrial activities started with a 21-year lease of an area from the Marquess of Bute by the Quaker entrepreneur William Weston Young, for mining silica rock round Craig-y-Ddinas from 1822 onwards. The silica was extracted for firebricks at the ''Dinas Firebrick Co.'' in Pont Walby. In 1843, Young's lease ran out and the then ''Riddles, Young & Co.'' firebrick makers moved to new premises on The Green, Neath. The stone sleepers for the silica mine tramway can still be seen in the path of the waterfall walk. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
