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Rhinogydd
The Rhinogydd (a Welsh plural form, often anglicised as Rhinogs and also known by the alternative Welsh plural Rhinogau) are a range of mountains located east of Harlech in North Wales. The name ''Rhinogydd'' derives from the names of two of the more famous peaks, Rhinog Fawr and Rhinog Fach, although the greatest elevation in the range is reached by Y Llethr, 756 m (2,480 feet). Foel Penolau, the northernmost summit of the range, was promoted to a Hewitt in 2018 due to a new survey. The Rhinogydd are notably rocky and heather-clad towards the northern end of the range, especially around Rhinog Fawr, Rhinog Fach and towards Moel Ysgyfarnogod. The southern end, around Y Llethr, Diffwys and the Ysgethin Valley has a softer, grassy character. A population of feral goats are in the range. Over 30 km² are protected as a Special Area of Conservation and a National Nature Reserve. Geology The Rhinogydd are formed of hard sedimentary rocks of Cambrian age which occur as a major a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinog Fach And Y Llethr
The Rhinogydd (a Welsh plural form, often anglicised as Rhinogs and also known by the alternative Welsh plural Rhinogau) are a range of mountains located east of Harlech in North Wales. The name ''Rhinogydd'' derives from the names of two of the more famous peaks, Rhinog Fawr and Rhinog Fach, although the greatest elevation in the range is reached by Y Llethr, 756 m (2,480 feet). Foel Penolau, the northernmost summit of the range, was promoted to a Hewitt in 2018 due to a new survey. The Rhinogydd are notably rocky and heather-clad towards the northern end of the range, especially around Rhinog Fawr, Rhinog Fach and towards Moel Ysgyfarnogod. The southern end, around Y Llethr, Diffwys and the Ysgethin Valley has a softer, grassy character. A population of feral goats are in the range. Over 30 km² are protected as a Special Area of Conservation and a National Nature Reserve. Geology The Rhinogydd are formed of hard sedimentary rocks of Cambrian age which occur as a major a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Y Llethr
Y Llethr is the highest mountain in the Rhinogydd range of Snowdonia, in north Wales. The summit consists of a flat grassy top marked only by a small cairn. The summit is more in keeping with its southern flanks than its rugged northern approach. The shortest route to the summit goes from the valley of Cwm Nantcol in the west, either directly or via Bwlch Drws Ardudwy and over the mountain of Rhinog Fach. To the south lies the mountain of Diffwys Diffwys is a mountain in Snowdonia, Wales, near Barmouth and forms part of the Rhinogydd. On the north side is an exposure of the Caerdion Syncline. It is technically a subsidiary summit of Y Llethr, missing Marilyn status by 2m. It is ther ..., to the south-east lies the mountain of Y Garn, to the north lies Rhinog Fach and to the west lies the hill of Moelfre.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. . References Dyffryn Ardu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinog Fawr
''Rhinog Fawr'' is a mountain in Snowdonia, North Wales and forms part of the Rhinogydd range. It is the third highest summit of the Rhinogydd, losing out to Y Llethr and Diffwys respectively. Its smaller cousin Rhinog Fach lies to the south, separated by the pass of Bwlch Drws Ardudwy, while its other neighbour, Moel Ysgyfarnogod lies to the north. In common with most of the range, the terrain is characterised by hard sedimentary rock Sedimentary rocks are types of rock that are formed by the accumulation or deposition of mineral or organic particles at Earth's surface, followed by cementation. Sedimentation is the collective name for processes that cause these particles ... covered with heather, making progress on foot difficult. At 510m, nestled in crags, lies ''Llyn Du'', a small tarn beneath the summit. The ascent is most easily made from the north-east or north-west, via the ''Roman Steps'' pass.Nuttall, John & Anne (1999). ''The Mountains of England & Wales'' - ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Diffwys
Diffwys is a mountain in Snowdonia, Wales, near Barmouth and forms part of the Rhinogydd. On the north side is an exposure of the Caerdion Syncline. It is technically a subsidiary summit of Y Llethr, missing Marilyn status by 2m. It is therefore a sub Marilyn (hill), Marilyn. The summit has a trig point. To the north is Y Llethr and Crib-y-rhiw, to the east is Y Garn (Rhinogydd), Y Garn, to the south is Cadair Idris, and to the west is its top Diffwys West Top.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. . References External links www.geograph.co.uk : photos of Diffwys and surrounding area Dyffryn Ardudwy Llanelltyd Mountains and hills of Gwynedd Mountains and hills of Snowdonia Hewitts of Wales Nuttalls {{Gwynedd-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harlech Dome
The Harlech Dome is a geological dome in southern Snowdonia in north Wales. It extends approximately from Blaenau Ffestiniog in the north to Tywyn in the south, and includes Harlech, The Rhinogydd, Barmouth and Cadair Idris. The geological layer structure comprises Cambrian sedimentary, volcanic and intrusive rocks from the lower Paleozoic age approximately 4.5 km thick. The geology contains the Harlech Grits Group, Mawddach Group, Rhobell Volcanic Group and Aran Volcanic Group. The area contains a wide range of metallic minerals and has been mined for (copper, silver, zinc, manganese, gold Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile met ...) in the past. References Rock formations of Gwynedd {{UK-geology-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhinog Fach
Rhinog Fach is a mountain in Snowdonia, North Wales and forms part of the Rhinogydd. Technically, Rhinog Fach is a subsidiary summit of Y Llethr, but is a Marilyn. To the north lies its higher cousin Rhinog Fawr, separated by the shapely pass of Bwlch Drws Ardudwy. Although shorter than the highest mountain in the Rhinog range, Y Llethr Y Llethr is the highest mountain in the Rhinogydd range of Snowdonia, in north Wales. The summit consists of a flat grassy top marked only by a small cairn. The summit is more in keeping with its southern flanks than its rugged northern ..., it is often regarded as the true 'king of the Rhinogydd' due to its spectacular rocky peak. Unlike Fach, Y Llethr's peak is grassy and unremarkable.Nuttall, John & Anne (1999). The Mountains of England & Wales - Volume 1: Wales (2nd edition ed.). Milnthorpe, Cumbria: Cicerone. . References External links www.geograph.co.uk : photos of Rhinog Fach and surrounding area Ganllwyd Llanbedr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Foel Penolau
Foel Penolau is a mountain close to Moel Ysgyfarnogod in Snowdonia, North Wales and is the northernmost summit of the Rhinogydd, and overlooks Llyn Trawsfynydd. From the summit it is possible to see the towns of Porthmadog and Blaenau Ffestiniog. As a result of a revised survey of its topographical prominence, Foel Penolau gained Hewitt and Simms Simms may refer to: First or middle name * Anna Simms Banks (1862–1923), American educator and politician * E. Simms Campbell (1906–1971), American cartoonist * Mary Simms Oliphant (1891–1988), American historian * Simms Taback (1932–2011 ... status in December 2018 when its prominence was measured to be above . The top of Foel Penolau is reputed to be one of the rockiest summits in Snowdonia, where hands must be used to attain the summit. The summit is on a large smooth slab of rock which is the surface of the outcrop from which the top was formed. References External linkswww.geograph.co.uk : photos of Moel Ysgyfarnogod ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moel Ysgyfarnogod
Moel Ysgyfarnogod (''Bare hill of the hares'' in Welsh) is a mountain in Snowdonia, North Wales and is the northernmost of the Rhinogydd. Rhinog Fawr lies directly south. It overlooks Llyn Trawsfynydd, and from the summit it is possible to see the towns of Porthmadog and Blaenau Ffestiniog. It may be climbed from Trawsfynydd in the east, or from Talsarnau in the west. To the north-west of the summit, on an area of moorland and rocky outcrops, lies Bryn Cader Faner, an ancient stone circle. It is one of the finest examples of a Bronze Age cairn in Britain, and has rocky standing stones A menhir (from Brittonic languages: ''maen'' or ''men'', "stone" and ''hir'' or ''hîr'', "long"), standing stone, orthostat, or lith is a large human-made upright stone, typically dating from the European middle Bronze Age. They can be foun ... along its circumference. References {{reflist External links www.geograph.co.uk : photos of Moel Ysgyfarnogod and surrounding area Talsarnau ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harlech
Harlech () is a seaside resort and community in Gwynedd, north Wales and formerly in the historic county of Merionethshire. It lies on Tremadog Bay in the Snowdonia National Park. Before 1966, it belonged to the Meirionydd District of the 1974 County of Gwynedd. Its landmark Harlech Castle was begun in 1283 by Edward I of England, captured by Owain Glyndŵr, and in the 1480s, a stronghold of Henry Tudor. Once on a seaside cliff face, it is now half a mile (800 m) inland. New housing has appeared in the low town and in the high town around the shopping street, church and castle. The two are linked by a steep road called "Twtil". Of its 1,447 inhabitants, 51 per cent habitually speak Welsh. The built-up area with Llanfair had a population of 1,762 in the 2001 census, over half of whom lacked Welsh identity, and the electoral ward which includes Talsarnau 1,997 in the 2011 census. The estimate in 2019 was 1,881. Etymology The exact derivation of the name "Harlech" is unclear. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Afon Ysgethin
The Afon Ysgethin is a short river in Gwynedd, Wales. Flowing entirely within Snowdonia National Park it rises beneath the peaks of Y Llethr and Diffwys within the Rhinogs mountain range and runs in a generally ESE direction towards Cardigan Bay. Headwater streams flow into a small upper lake, Llyn Dulyn, and Llyn Bodlyn reservoir. Originally a natural lake, Llyn Bodlyn was enlarged in 1894 to provide Barmouth with water. The river emerging from the reservoir is crossed by a historic track at Pont Scethin. This old stone arch bridge ("probably 18th century") was once used by packhorses and drovers moving between Harlech and London. A further 3 km downstream the river enters a narrower wooded valley and is crossed by Pont Fadog. An inscription on the bridge states that it was improved in 1762 by a mason called H. Edward, who was commissioned by William Vaughan, a member of the powerful owner family of nearby Cors-y-gedol hall (see Dyffryn Ardudwy Dyffryn Ardudwy () i ... [...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] |
Mudstone
Mudstone, a type of mudrock, is a fine-grained sedimentary rock whose original constituents were clays or muds. Mudstone is distinguished from '' shale'' by its lack of fissility (parallel layering).Blatt, H., and R.J. Tracy, 1996, ''Petrology.'' New York, New York, W. H. Freeman, 2nd ed, 529 pp. The term ''mudstone'' is also used to describe carbonate rocks (limestone or dolomite) that are composed predominantly of carbonate mud. However, in most contexts, the term refers to siliciclastic mudstone, composed mostly of silicate minerals. The NASA Curiosity rover has found deposits of mudstone on Mars that contain organic substances such as propane, benzene and toluene. Definition There is not a single definition of mudstone that has gained general acceptance,Boggs 2006, p.143 though there is wide agreement that mudstones are fine-grained sedimentary rocks, composed mostly of silicate grains with a grain size less than . Individual grains this size are too small to be disting ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
