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Argyll Group
The Argyll Group is a thick sequence of metamorphosed Neoproterozoic sedimentary rocks that outcrop across the Central Highlands of Scotland, east of the Great Glen, as well as appearing in the north of Ireland. It is a subdivision of the Dalradian Supergroup and is itself divided into four units; from oldest to youngest these are the Islay, Easdale, Crinan and Tayvallich subgroups. Islay Subgroup The lower boundary of the Islay Subgroup and hence the Argyll Group as a whole is defined at the base of the Port Askaig Tillite Formation, a diamictite which displays limestone clasts overlain by quartzite and granite clasts. The tillite is thickest in its type area and on the Garvellachs. The Schiehallion Boulder Bed of the eastern Grampians correlates with this tillite. The tillite is overlain by the Bonahaven Dolomite and then the Jura Quartzite which can reach up to 5 km thick but which is more typically between 500 and 1000m thick. Psammites and pelites occur within the se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Group (stratigraphy)
In geology, a group is a lithostratigraphy, lithostratigraphic Stratigraphic unit, unit consisting of a series of related Geological formation, formations that have been classified together to form a group. Formations are the fundamental unit of stratigraphy. Groups may sometimes be combined into Supergroup (geology), supergroups. Groups are useful for showing relationships between formations, and they are also useful for small-scale mapping or for studying the stratigraphy of large regions. Geologists exploring a new area have sometimes defined groups when they believe the strata within the groups can be divided into formations during subsequent investigations of the area. It is possible for only some of the strata making up a group to be divided into formations. An example of a group is the Glen Canyon Group, which includes (in ascending order) the Wingate Sandstone, the Moenave Formation, the Kayenta Formation, and the Navajo Sandstone. Each of the formations can be distingui ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Garvellachs
The Garvellachs (Scottish Gaelic: ''Na Garbh Eileacha'') or Isles of the Sea form a small archipelago in the Inner Hebrides of Scotland. The islands include Garbh Eileach, Dùn Chonnuill and Eileach an Naoimh. Part of the Argyll and Bute council area, they lie in Firth of Lorne west of Lunga and northwest of Scarba and have been uninhabited since the 19th century. The islands are known for their early Christian connections to Brendan the Navigator and Columba and for their bedrock containing rare formations in relation to the global Sturtian glaciation. Overview The waters surrounding the islands are extensively used for leisure sailing. Due to the array of separate tidal races produced by the underwater topography there are some treacherous stretches of water. These include the Grey Dog between Scarba and Lunga and the Gulf of Corryvreckan, between Scarba and Jura, in which is located the infamous Corryvreckan whirlpool, which is the third-largest whirlpool in the wor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinan, Argyll And Bute
Crinan () is a small village located on the west coast of Scotland in the region known as Knapdale, which is part of Argyll and Bute. Before the Crinan Canal was built, Crinan was named Port Righ which meant the king's port. The canal was named from the small settlement of Crinan Ferry on the edge of Loch Crinan where a small ferry landed. The name Crinan probably derives from the Creones tribe who lived in the area in 140 AD. The canal starts at Ardrishaig sea loch on Loch Gilp, and ends away at Crinan sea loch on the Sound of Jura. The canal was designed to provide a short cut between the west coast and islands at one end and the Clyde estuary at the other, and so avoid the long voyage around the south end of the Kintyre Peninsula. By the canal basin is a coffee shop and the nearby hotel and looks out across Loch Crinan to Duntrune Castle. Crinan Post Office is in the old Harbour House. Crinan Boatyard provides services and facilities for commercial and leisure boate ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Moray Firth
The Moray Firth (; , or ) is a roughly triangular inlet (or firth) of the North Sea, north and east of Inverness, which is in the Highland council area of the north of Scotland. It is the largest firth in Scotland, stretching from Duncansby Head (near John o' Groats) in the north, in the Highland council area, and Fraserburgh in the east, in the Aberdeenshire council area, to Inverness and the Beauly Firth in the west. Therefore, three council areas have Moray Firth coastline: Highland to the west and north of the Moray Firth and Highland, Moray and Aberdeenshire to the south. The firth has more than of coastline, much of which is cliff. Etymology The firth is named after the 10th-century Province of Moray, whose name in turn is believed to derive from the sea of the firth itself. The local names ''Murar'' or ''Morar'' are suggested to derive from , the Gaelic for sea, whilst ''Murav'' and ''Morav'' are believed to be rooted in Celtic words (sea) and (side), co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Knapdale
Knapdale (, ) forms a rural district of Argyll and Bute in the Scottish Highlands, adjoining Kintyre to the south, and divided from the rest of Argyll to the north by the Crinan Canal. It includes two parishes, North Knapdale and South Knapdale. The area is bounded by sea to the east and west (Loch Fyne and the Sound of Jura respectively), whilst the sea loch of West Loch Tarbert almost completely cuts off the area from Kintyre to the south.Ordnance Survey. Landranger 1:50000 Map Sheet 55 (Lochgilphead & Loch Awe)Ordnance Survey. Landranger 1:50000 Map Sheet 62 (North Kintyre & Tarbert) The name is derived from two Gaelic elements: ''Cnap'' meaning hill and ''Dall'' meaning field. Knapdale gives its name to the Knapdale National Scenic Area, one of the forty national scenic areas in Scotland, which are defined so as to identify areas of exceptional scenery and to ensure their protection from inappropriate development. The designated area covers in total, of which is on land ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Jura, Scotland
Jura ( ; ) is an island in the Inner Hebrides of Scotland, adjacent to and northeast of Islay. With an area of , and 196 inhabitants recorded in the 2011 census, Jura is more sparsely populated than Islay, and is one of the least densely populated islands of Scotland: in a list of the islands of Scotland ranked by size, Jura comes eighth, whereas by population it comes 31st. The island is mountainous, bare and largely infertile, covered by extensive areas of blanket bog. The main settlement is the east coast village of Craighouse, on the Sound of Jura. The Jura distillery, producing Isle of Jura single malt whisky, is in the village, as is the island's rum distillery which opened in 2021. Craighouse also houses the island's shop, church, primary school, the Jura hotel and bar, a gallery, craft shop, tearoom and the community run petrol pumps. North of Craighouse are a number of other small settlements on or near the east coast: Keils, Knockrome, Ardfernal, Lagg, Jura, Lagg, Tarb ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Volcaniclastic
Volcaniclastics are geologic materials composed of broken fragments (clasts) of volcanic rock. These encompass all clastic volcanic materials, regardless of what process fragmented the rock, how it was subsequently transported, what environment it was deposited in, or whether nonvolcanic material is mingled with the volcanic clasts. The United States Geological Survey defines volcaniclastics somewhat more narrowly, to include only rock composed of volcanic rock fragments that have been transported some distance from their place of origin. In the broad sense of the term, volcaniclastics includes pyroclastic rocks such as the Bandelier Tuff; cinder cones and other tephra deposits; the basal and capping breccia that characterize ʻaʻā lava flows; and lahars and debris flows of volcanic origin.Vincent 2000, pp.27-28 Volcaniclastics make up more of the volume of many volcanoes than do lava flows. Volcaniclastics may have contributed as much as a third of all sedimentation in the geolo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Phyllite
Phyllite ( ) is a type of foliation (geology), foliated metamorphic rock formed from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation.Stephen Marshak ''Essentials of Geology'', 3rd ed. It is primarily composed of quartz, sericite mica, and chlorite group, chlorite. Phyllite has fine-grained mica flakes, whereas slate has extremely fine mica flakes, and schist has large mica flakes, all mica flakes of which have achieved a preferred orientation. Among foliated metamorphic rocks, it represents a gradation in the degree of metamorphism between slate and schist. The minute crystals of graphite, sericite, or chlorite, or the translucent fine-grained white mica, impart a silky, sometimes golden sheen to the surfaces of cleavage (geology), cleavage, called "phyllitic luster". The word comes from the Greek ''phyllon'', meaning "leaf". The protolith (or parent rock) for phyllite is shale or pelite; or slate, which in turn came ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Craignish
Craignish (Scottish Gaelic, ''Creiginis'') is a peninsula in Argyll and Bute, on the west coast of Scotland. It lies around south of Oban, and north-west of Lochgilphead. The peninsula is around long, and is aligned along a north-east to south-west orientation, in common with much of the landform of coastal Argyll. To the south is Loch Craignish, which contains several small islands. To the north are the Slate Islands, with the island of Shuna closest. Jura is only west of Craignish Point, the southern tip of Craignish. There are two main settlements on Craignish, Ardfern on the south coast, and the modern village of Craobh Haven, established in 1983 as a holiday resort and marina, on the north. A single-track road, the B8002, runs along the south shore of the peninsula. In October 2023 a landslip blocked the A816, which feeds the B8002, cutting-off the village from the south. Heavy rain caused 6,000 tonnes of earth to fall, blocking the road. The road was still b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Conglomerate (geology)
Conglomerate () is a sedimentary rock made up of rounded gravel-sized pieces of rock surrounded by finer-grained sediments (such as sand, silt, or clay). The larger fragments within conglomerate are called clasts, while the finer sediment surrounding the clasts is called the matrix. The clasts and matrix are typically cemented by calcium carbonate, iron oxide, silica, or hardened clay. Conglomerates form when rounded gravels deposited by water or glaciers become solidified and cemented by pressure over time. They can be found in sedimentary rock sequences of all ages but probably make up less than 1 percent by weight of all sedimentary rocks. They are closely related to sandstones in origin, and exhibit many of the same types of sedimentary structures, such as tabular and trough cross-bedding and graded bedding.Boggs, S. (2006) ''Principles of Sedimentology and Stratigraphy.'', 2nd ed. Prentice Hall, New York. 662 pp. Friedman, G.M. (2003) ''Classification of sediments and s ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scarba
Scarba () is an island, in Argyll and Bute, Scotland, just north of the much larger island of Jura. The island has not been permanently inhabited since the 1960s. Until his death in 2013 it was owned by Richard Hill, 7th Baron Sandys; its owner now is Shane Cadzow who farms Luing cattle on the nearby island of Luing and grazes some of the cattle on Scarba. Kilmory Lodge is used seasonally as a shooting lodge, the island having a flourishing herd of red deer. The island's name is from the Norse and may mean "sharp, stony, hilly terrain" or "cormorant island".Mac an Tàilleir (2003) p. 104 Description Scarba is not served by any public ferries, but access from Craobh Haven or Crinan Harbour is possible by arrangement with local boatmen. The rough summit ridge can be accessed from the harbour at the north end, from where a vehicle track leads up past Kilmory Lodge to a height of about 200 metres. After that, there are no paths or well defined routes, and the terrain b ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ladder Hills
The Ladder Hills () are a range of hills in northeast Scotland which straddle the border between Aberdeenshire and Moray and form a part of the Grampian Mountains. The highest point of the range is Càrn Mòr at , which is classed as a Corbett; other named tops include Monadh an t-Sluich Leith (800m), Carn Liath (792m), Dun Muir (754m) and Little Geal Charn (742m). The hills are formed for the most part from late Precambrian age metamorphosed sandstones and mudstones; quartzites, psammites, pelites and semipelites which together form the Ladder Hills and Kymah Quartzite formations. These are placed within the Islay Subgroup of the Argyll Group, itself a division of the late Dalradian Supergroup. Parts of the range are formed from carbonate rich rocks. Metadolerite dykes intrude this sequence in places. The rock strata are intensely folded and typically dip steeply to the southeast or northwest. The range takes its name from the Ladder Road, a high pass which runs between Gl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
