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Kerrera (; gd, Cearara or ''Cearrara'') is an island in the Scottish
Inner Hebrides The Inner Hebrides (; Scottish Gaelic: ''Na h-Eileanan a-staigh'', "the inner isles") is an archipelago off the west coast of mainland Scotland, to the south east of the Outer Hebrides. Together these two island chains form the Hebrides, whi ...
, close to the town of
Oban Oban ( ; ' in Scottish Gaelic meaning ''The Little Bay'') is a resort town within the Argyll and Bute council area of Scotland. Despite its small size, it is the largest town between Helensburgh and Fort William. During the tourist season, ...
. In 2016 it had a population of 45, divided into two communities in the north and south of the island.


Geology

The oldest bedrock of Kerrera is black
slate Slate is a fine-grained, foliated, homogeneous metamorphic rock derived from an original shale-type sedimentary rock composed of clay or volcanic ash through low-grade regional metamorphism. It is the finest grained foliated metamorphic rock. ...
ascribed to the Easdale Subgroup of the
Dalradian The Dalradian Supergroup (informally and traditionally the Dalradian) is a stratigraphic unit (a sequence of rock strata) in the lithostratigraphy of the Grampian Highlands of Scotland and in the north and west of Ireland. The diverse assembl ...
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 Dalra ...
. Overlying this across half of the island are conglomeratic
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 silicat ...
s and
basalt Basalt (; ) is an aphanitic (fine-grained) extrusive igneous rock formed from the rapid cooling of low-viscosity lava rich in magnesium and iron (mafic lava) exposed at or very near the surface of a rocky planet or moon. More than 90 ...
and
augite Augite is a common rock-forming pyroxene mineral with formula . The crystals are monoclinic and prismatic. Augite has two prominent cleavages, meeting at angles near 90 degrees. Characteristics Augite is a solid solution in the pyroxene group ...
-
andesite Andesite () is a volcanic rock of intermediate composition. In a general sense, it is the intermediate type between silica-poor basalt and silica-rich rhyolite. It is fine-grained (aphanitic) to porphyritic in texture, and is composed predo ...
lava Lava is molten or partially molten rock (magma) that has been expelled from the interior of a terrestrial planet (such as Earth) or a moon onto its surface. Lava may be erupted at a volcano or through a fracture in the crust, on land or ...
s of early
Devonian The Devonian ( ) is a geologic period and system of the Paleozoic era, spanning 60.3 million years from the end of the Silurian, million years ago (Mya), to the beginning of the Carboniferous, Mya. It is named after Devon, England, wh ...
age, the former being the local representative of the
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 exte ...
and the latter constituting part of the
Lorne Plateau Lavas The Lorne plateau lavas are basaltic lava flows extruded in the late Silurian, 424 to 415 million years ago, which are found today in the Oban - Kerrera area of Scotland. Peperite occurs where they flowed into Old Red Sandstone The Old Red Sa ...
.
Ripple mark In geology, ripple marks are sedimentary structures (i.e., bedforms of the lower flow regime) and indicate agitation by water (current or waves) or wind. Defining ripple cross-laminae and asymmetric ripples * ''Current ripple marks'', ''unidi ...
s and sun cracks are preserved in
shale Shale is a fine-grained, clastic sedimentary rock formed from mud that is a mix of flakes of clay minerals (hydrous aluminium phyllosilicates, e.g. kaolin, Al2 Si2 O5( OH)4) and tiny fragments (silt-sized particles) of other minerals, especiall ...
strata on the south coast, belying the subaerial environment in which deposition of these sediments took place. There are thin
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 w ...
s within both the Easdale Slate Formation and the younger sandstones. All of these strata are cut by NW-SE aligned
igneous Igneous rock (derived from the Latin word ''ignis'' meaning fire), or magmatic rock, is one of the three main rock types, the others being sedimentary and metamorphic. Igneous rock is formed through the cooling and solidification of magma or ...
dykes forming part of the North Britain Palaeogene Dyke Suite associated with early
Palaeogene The Paleogene ( ; also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period and system that spans 43 million years from the end of the Cretaceous Period million years ago ( Mya) to the beginning ...
volcanism Volcanism, vulcanism or volcanicity is the phenomenon of eruption of molten rock (magma) onto the surface of the Earth or a solid-surface planet or moon, where lava, pyroclastics, and volcanic gases erupt through a break in the surface called a ...
. A number of geological faults cut across Kerrera, the majority are aligned NE-SW. Modern beach deposits and raised marine deposits of
Holocene The Holocene ( ) is the current geological epoch. It began approximately 11,650 cal years Before Present (), after the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene togeth ...
age are found around the island particularly on the north coast and along the Sound of Kerrera.


Geography

The island is around long and around wide, and is separated from the mainland by the Sound of Kerrera, about wide. The highest point on Kerrera is Carn Breugach at . The island is linked to the mainland by two ferry services. In the middle of the island, the
Caledonian MacBrayne Caledonian MacBrayne ( gd, Caledonian Mac a' Bhriuthainn), usually shortened to CalMac, is the major operator of passenger and vehicle ferries, and ferry services, between the mainland of Scotland and 22 of the major islands on Scotland's west ...
passenger ferry MV ''Carvoria'' operates from the Gallanach Road (about southwest of Oban). From the landing place, tracks lead to the scattered settlements in the centre and south of the island. The south end circular walking loop takes around 3 hours to walk. The northern tip of the island can be accessed by a separate marina ferry service operating from North Pier in the centre of
Oban Oban ( ; ' in Scottish Gaelic meaning ''The Little Bay'') is a resort town within the Argyll and Bute council area of Scotland. Despite its small size, it is the largest town between Helensburgh and Fort William. During the tourist season, ...
. The service runs to Oban Marina near Ardentrive Farm, which is linked by a track to the rest of the island.


History

The island is known for the ruined
Gylen Castle Gylen Castle is a ruined castle, or tower house, at the south end of the island of Kerrera in Argyll and Bute, Scotland, on a promontory overlooking the Firth of Lorne. It was made a scheduled monument in 1931. History Built in 1582 by the Clan ...
, a small tower house built in 1582. It was also the place where
Alexander II of Scotland Alexander II ( Medieval Gaelic: '; Modern Gaelic: '; 24 August 1198 – 6 July 1249) was King of Scotland from 1214 until his death. He concluded the Treaty of York (1237) which defined the boundary between England and Scotland, virtually un ...
died in 1249. The artist
J. M. W. Turner Joseph Mallord William Turner (23 April 177519 December 1851), known in his time as William Turner, was an English Romantic painter, printmaker and watercolourist. He is known for his expressive colouring, imaginative landscapes and turbul ...
visited Kerrera in 1831 and made 25 sketches of the castle which are in the
Tate Gallery Tate is an institution that houses, in a network of four art galleries, the United Kingdom's national collection of British art, and international modern and contemporary art. It is not a government institution, but its main sponsor is the U ...
, London.


Community

Most of the island is owned by the McDougalls of Dunollie, who are descended from the Norse-Gael
Somerled Somerled (died 1164), known in Middle Irish as Somairle, Somhairle, and Somhairlidh, and in Old Norse as Sumarliði , was a mid-12th-century Norse-Gaelic lord who, through marital alliance and military conquest, rose in prominence to create the ...
. The tidal island at the north-east tip of Kerrera, Rubh a' Chruidh, was sold for £426,000 in 2010 to Lanarkshire businessman David Hamilton. In the 2011 census, Kerrera had a population of 34. However in 2019, residents say that the population has doubled to 68 people, including 18 children. There are no public buildings or facilities (apart from two
compost Compost is a mixture of ingredients used as plant fertilizer and to improve soil's physical, chemical and biological properties. It is commonly prepared by decomposing plant, food waste, recycling organic materials and manure. The resulting ...
loos provided by the community) on the island. In July 2019, the Isle of Kerrera Development Trust community organisation purchased the old primary school building, close to the public ferry slip near the centre of the island; the building had been empty and deteriorating since closing in 1997. The community plan to restore the building into a multi-functional centre. The main industries on the island are farming (sheep and Highland cattle) and tourism. There was an exotic bird sanctuary, closed . There is a tea room/café (Kerrera Tea Garden & Bunkhouse) at the south end near Gylen Castle but no shop and no pub. The castle itself was restored to some extent in 2006 and is open to the public. In August 2021 work began to connect the small communities in the north and south of the island by road. A forestry track was initially constructed, and in October 2022 a metalled single track road was opened.


Gallery

File:Kerrera Outline Map.svg, Outline map of Kerrera. File:Kerrera from Oban.jpg, Sunset over Kerrera, viewed from Oban. File:KerreraChurch2014.jpg, Disused school on Kerrera


References


External links

{{DEFAULTSORT:Kerrera Islands of Argyll and Bute Islands of the Inner Hebrides