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Scottish Islands
This is a list of islands of Scotland, the mainland of which is part of the island of Great Britain. Also included are various other related tables and lists. The definition of an offshore island used in this list is "land that is surrounded by seawater on a daily basis, but not necessarily at all stages of the tide, excluding human devices such as bridges and causeways". Scotland has over 790 offshore islands, most of which are to be found in four main groups: Shetland, Orkney, and the Hebrides, sub-divided into the Inner Hebrides and Outer Hebrides. There are also clusters of islands in the Firth of Clyde, Firth of Forth, and Solway Firth, and numerous small islands within the many bodies of fresh water in Scotland including Loch Lomond and Loch Maree. The largest island is Lewis and Harris which extends to 2,179 square kilometres, and there are a further 200 islands which are greater than 40 hectares in area. Of the remainder, several such as Staffa and the Flannan Isles ...
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Staffa
Staffa ( gd, Stafa, , from the Old Norse for stave or pillar island) is an island of the Inner Hebrides in Argyll and Bute, Scotland. The Vikings gave it this name as its columnar basalt reminded them of their houses, which were built from vertically placed tree-logs. Staffa lies about west of the Isle of Mull; its area is and the highest point is above sea level. The island came to prominence in the late 18th century after a visit by Sir Joseph Banks. He and his fellow-travellers extolled the natural beauty of the basalt columns in general and of the island's main sea cavern, which Banks renamed 'Fingal's Cave'. Their visit was followed by those of many other prominent personalities throughout the next two centuries, including Queen Victoria and Felix Mendelssohn. The latter's ''Hebrides Overture'' brought further fame to the island, which was by then uninhabited. It is now in the care of the National Trust for Scotland. Geology and pre-history In prehistoric times (Plei ...
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Gulf Of Corryvreckan
The Gulf of Corryvreckan (from the Gaelic ''Coire Bhreacain'', meaning 'cauldron of the speckled seas' or 'cauldron of the plaid'), also called the Strait of Corryvreckan, is a narrow strait between the islands of Jura and Scarba, in Argyll and Bute, off the west coast of mainland Scotland. It is possible for tourists to visit the site by way of boat trips from local harbours or sightseeing flights from Oban Airport. Topography Strong Atlantic currents and unusual underwater topography together produce a particularly intense tidal race in the Corryvreckan channel. As the flood tide enters the narrow area between the two islands it speeds up to and meets a variety of seabed features, including a deep hole and a rising pinnacle. These features combine to create whirlpools, standing waves and a variety of other surface effects. The Corryvreckan is the third largest whirlpool in the world, and is on the northern side of the gulf, surrounding a pyramid-shaped basalt pinnacle tha ...
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Volcanoes
A volcano is a rupture in the crust of a planetary-mass object, such as Earth, that allows hot lava, volcanic ash, and gases to escape from a magma chamber below the surface. On Earth, volcanoes are most often found where tectonic plates are diverging or converging, and most are found underwater. For example, a mid-ocean ridge, such as the Mid-Atlantic Ridge, has volcanoes caused by divergent tectonic plates whereas the Pacific Ring of Fire has volcanoes caused by convergent tectonic plates. Volcanoes can also form where there is stretching and thinning of the crust's plates, such as in the East African Rift and the Wells Gray-Clearwater volcanic field and Rio Grande rift in North America. Volcanism away from plate boundaries has been postulated to arise from upwelling diapirs from the core–mantle boundary, deep in the Earth. This results in hotspot volcanism, of which the Hawaiian hotspot is an example. Volcanoes are usually not created where two tectonic plates slide pa ...
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Tertiary
Tertiary ( ) is a widely used but obsolete term for the geologic period from 66 million to 2.6 million years ago. The period began with the demise of the non-avian dinosaurs in the Cretaceous–Paleogene extinction event, at the start of the Cenozoic Era, and extended to the beginning of the Quaternary glaciation at the end of the Pliocene Epoch. The time span covered by the Tertiary has no exact equivalent in the current geologic time system, but it is essentially the merged Paleogene and Neogene periods, which are informally called the Early Tertiary and the Late Tertiary, respectively. The Tertiary established the Antarctic as an icy island continent. Historical use of the term The term Tertiary was first used by Giovanni Arduino during the mid-18th century. He classified geologic time into primitive (or primary), secondary, and tertiary periods based on observations of geology in Northern Italy. Later a fourth period, the Quaternary, was applied. In the early d ...
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Rùm
Rùm (), a Scottish Gaelic name often anglicised to Rum (), is one of the Small Isles of the Inner Hebrides, in the district of Lochaber, Scotland. For much of the 20th century the name became Rhum, a spelling invented by the former owner, Sir George Bullough, because he did not relish the idea of having the title "Laird of Rum". It is the largest of the Small Isles, and the 15th largest Scottish island, but is inhabited by only about thirty or so people, all of whom live in the hamlet of Kinloch on the east coast. The island has been inhabited since the 8th millennium BC and provides some of the earliest known evidence of human occupation in Scotland. The early Celtic and Norse settlers left only a few written accounts and artefacts. From the 12th to 13th centuries on, the island was held by various clans including the MacLeans of Coll. The population grew to over 400 by the late 18th century but was cleared of its indigenous population between 1826 and 1828. The island the ...
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Old Red Sandstone
The Old Red Sandstone is an assemblage of rocks in the North Atlantic region largely of Devonian age. It extends in the east across Great Britain, Ireland and Norway, and in the west along the northeastern seaboard of North America. It also extends northwards into Greenland and Svalbard. These areas were a part of the ancient continent of Euramerica, Euramerica/Laurussia. In Britain it is a lithostratigraphy, lithostratigraphic unit (a sequence of rock strata) to which Stratigraphy, stratigraphers accord Geological unit#Lithostratigraphic units, supergroup status and which is of considerable importance to early paleontology. For convenience the short version of the term, ORS is often used in literature on the subject. The term was coined to distinguish the sequence from the younger New Red Sandstone which also occurs widely throughout Britain. Sedimentology The Old Red Sandstone describes a suite of sedimentary rocks deposited in a variety of environments during the Devonian ...
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Shapinsay
Shapinsay (, sco, Shapinsee) is one of the Orkney Islands off the north coast of mainland Scotland. There is one village on the island, Balfour, from which roll-on/roll-off car ferries sail to Kirkwall on the Orkney Mainland. Balfour Castle, built in the Scottish Baronial style, is one of the island's most prominent features, a reminder of the Balfour family's domination of Shapinsay during the 18th and 19th centuries; the Balfours transformed life on the island by introducing new agricultural techniques. Other landmarks include a standing stone, an Iron Age broch, a souterrain and a salt-water shower. With an area of , Shapinsay is the eighth largest island in the Orkney archipelago. It is low-lying and fertile, consequently most of the area is given over to farming. Shapinsay has two nature reserves and is notable for its bird life. At the 2011 census, Shapinsay had a population of 307. The economy of the island is primarily based on agriculture with the exception of a fe ...
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Lewisian Complex
The Lewisian complex or Lewisian gneiss is a suite of Precambrian metamorphic rocks that outcrop in the northwestern part of Scotland, forming part of the Hebridean Terrane and the North Atlantic Craton. These rocks are of Archaean and Paleoproterozoic age, ranging from 3.0–1.7 billion years ( Ga). They form the basement on which the Torridonian and Moine Supergroup sediments were deposited. The Lewisian consists mainly of granitic gneisses with a minor amount of supracrustal rocks. Rocks of the Lewisian complex were caught up in the Caledonian orogeny, appearing in the hanging walls of many of the thrust faults formed during the late stages of this tectonic event. Distribution The main outcrops of the Lewisian complex are on the islands of the Outer Hebrides, including Lewis, from which the complex takes its name. It is also exposed on several islands of the Inner Hebrides, small islands north of the Scottish mainland and forms a coastal strip on the mainland from near L ...
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Archean
The Archean Eon ( , also spelled Archaean or Archæan) is the second of four geologic eons of Earth's history, representing the time from . The Archean was preceded by the Hadean Eon and followed by the Proterozoic. The Earth Earth is the third planet from the Sun and the only astronomical object known to harbor life. While large volumes of water can be found throughout the Solar System, only Earth sustains liquid surface water. About 71% of Earth's surfa ... during the Archean was mostly a water world: there was continental crust, but much of it was under an ocean deeper than today's ocean. Except for some trace minerals, today's oldest continental crust dates back to the Archean. Much of the geological detail of the Archean has been destroyed by subsequent activity. The Earliest known life forms, earliest known life started in the Archean. Life was simple throughout the Archean, mostly represented by shallow-water microbial mats called stromatolites, and the a ...
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Sanday, Orkney
Sanday (, sco, Sandee) is one of the inhabited islands of Orkney that lies off the north coast of mainland Scotland. With an area of , it is the third largest of the Orkney Islands.Haswell-Smith (2004) p. 334. The main centres of population are Lady Village and Kettletoft. Sanday can be reached by Orkney Ferries or by plane (Sanday Airport) from Kirkwall on the Orkney Mainland. On Sanday, an on-demand public minibus service allows connecting to the ferry. Etymology The Picts were the pre-Norse inhabitants of Sanday but very few placenames remain from this period. The Norse named the island or because of the predominance of sandy beaches and this became "Sanday" during the Scots- and English-speaking periods. The similarly named Sandoy is in the Faroe Islands. Many names of places and natural features derive from Old Norse. According to Dorward (1995), the placename ''Kettletoft'' means ' Kettil's croft' although ''toft'' in this context may mean 'abandoned site of house' fr ...
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Tiree
Tiree (; gd, Tiriodh, ) is the most westerly island in the Inner Hebrides of Scotland. The low-lying island, southwest of Coll, has an area of and a population of around 650. The land is highly fertile, and crofting, alongside tourism, and fishing are the main sources of employment for the islanders. Tiree, along with Colonsay, enjoys a relatively high number of total hours of sunshine during the late spring and early summer compared to the average for the United Kingdom. Tiree is a popular windsurfing venue; it is sometimes referred to as "Hawaii of the north". In most years, the Tiree World Classic surfing event is held here. People native to the island are known as Tirisdich. History Tiree is known for the 1st-century-AD broch, for the prehistoric carved Ringing Stone and for the birds of the headland. , abbot of Iona Abbey 679–704, recorded several stories relating to St Columba and the island of Tiree. In one story, Columba warned a monk called Berach not to ...
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