Scarba ( gd, Sgarba) is an island, in

Argyll and Bute Argyll and Bute ( sco, Argyll an Buit; gd, Earra-Ghàidheal agus Bòd, ) is one of 32 unitary authority council areas in Scotland and a lieutenancy area. The current lord-lieutenant for Argyll and Bute is Jane Margaret MacLeod (14 July 2020) ...

, Scotland, just north of the much larger island of Jura. The island was owned by Richard Hill, 7th Baron Sandys, and has not been permanently inhabited since the 1960s. It is now covered in heather and used for

grazing In agriculture, grazing is a method of animal husbandry whereby domestic livestock are allowed outdoors to roam around and consume wild vegetations in order to convert the otherwise indigestible (by human gut) cellulose within grass and othe ...

animals. Kilmory Lodge is used seasonally as a shooting lodge, the island having a flourishing herd of

red deer The red deer (''Cervus elaphus'') is one of the largest deer species. A male red deer is called a stag or hart, and a female is called a hind. The red deer inhabits most of Europe, the Caucasus Mountains region, Anatolia, Iran, and parts of we ...

. 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 becomes rough and boggy. The island rises steeply to a peak (Cruach Scarba) of . A cylindrical triangulation point marks the highest of several summits, which are surrounded by several small lochs.

Geology

The western two-thirds of Scarba is formed from the

Neoproterozoic The Neoproterozoic Era is the unit of geologic time from 1 billion to 538.8 million years ago. It is the last era of the Precambrian Supereon and the Proterozoic Eon; it is subdivided into the Tonian, Cryogenian, and Ediacaran periods. It is pre ...

aged coarse-grained

quartzite Quartzite is a hard, non- foliated metamorphic rock which was originally pure quartz sandstone.Essentials of Geology, 3rd Edition, Stephen Marshak, p 182 Sandstone is converted into quartzite through heating and pressure usually related to ...

s of the Jura Quartzite Formation ascribed to the Islay 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 assembla ...

Argyll Group. Separated from these rocks by a north–south aligned

geological fault In geology, a fault is a planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements. Large faults within Earth's crust result from the action of plate tectoni ...

, the bedrock of the eastern third is the Neoproterozoic Scarba Conglomerate Formation, and the subordinate Jura Slate Member belonging to the Easdale Subgroup of the Argyll Group. North-south aligned dykes of

amphibolite Amphibolite () is a metamorphic rock that contains amphibole, especially hornblende and actinolite, as well as plagioclase feldspar, but with little or no quartz. It is typically dark-colored and dense, with a weakly foliated or schistose ( ...

are found throughout the Jura Quartzite whilst

lamprophyre Lamprophyres () are uncommon, small-volume ultrapotassic igneous rocks primarily occurring as dikes, lopoliths, laccoliths, stocks, and small intrusions. They are alkaline silica- undersaturated mafic or ultramafic rocks with high magnesium ox ...

dykes of Siluro-

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, w ...

age 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 tha ...

and micro-

gabbro Gabbro () is a phaneritic (coarse-grained), mafic intrusive igneous rock formed from the slow cooling of magnesium-rich and iron-rich magma into a holocrystalline mass deep beneath the Earth's surface. Slow-cooling, coarse-grained gabbro is ch ...

dykes forming part of the

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 o ...

age ‘Mull Dyke Swarm’ cut through both the Quartzite in the west and the conglomerate in the east. Raised marine deposits of sand and gravel occur on the northeast coast, a legacy of late

Quaternary The Quaternary ( ) is the current and most recent of the three periods of the Cenozoic Era in the geologic time scale of the International Commission on Stratigraphy (ICS). It follows the Neogene Period and spans from 2.58 million yea ...

changes in relative sea-level.

Peat Peat (), also known as turf (), is an accumulation of partially decayed vegetation or organic matter. It is unique to natural areas called peatlands, bogs, mires, moors, or muskegs. The peatland ecosystem covers and is the most efficie ...

deposits are common within the island's interior.

Corryvreckan

Between Scarba and Jura lies the

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 ...

, known for its

whirlpool A whirlpool is a body of rotating water produced by opposing currents or a current running into an obstacle. Small whirlpools form when a bath or a sink is draining. More powerful ones formed in seas or oceans may be called maelstroms ( ). ''Vo ...

. Writing in 1549, Dean Monro wrote of "Skarbay" that between it and "Duray":

Ther runnes ane streame, above the power of all sailing and rowing, with infinite dangers, callit Corybrekan. This stream is aught myle lang, quhilk may not be hantit bot be certain tyds. This Skarbay is four myles lange from the west to the eist, and an myle breadth, ane high rough yle, inhabit and manurit, with some woods in it.

Scarba and a few nearby islets ( Lunga and the Garvellachs) are collectively the Scarba, Lunga and the Garvellachs National Scenic Area, one of 40 such areas in Scotland, which are defined so as to identify areas of exceptional scenery and to ensure its protection by restricting certain forms of development.

Gallery

File:Corryvreckan.jpg, The Corryvreckan whirlpool File:Scarba1.JPG, The view from

Luing Luing ( ; Gaelic: ''Luinn'') is one of the Slate Islands, Firth of Lorn, in the west of Argyll in Scotland, about south of Oban. The island has an area of and is bounded by several small skerries and islets. It has a population of around 200 p ...

looking towards Scarba File:Scarba.jpg, Na h-Urrachann, Isle of Scarba, looking north towards the

Slate Islands The Slate Islands are an island group in the Inner Hebrides, lying immediately off the west coast of Scotland, north of Jura and southwest of Oban. The main islands are Seil, Easdale, Luing, Shuna, Torsa and Belnahua. Scarba and Kerrera, ...

File:Scarba-ridge.jpg, A view northwards along the summit ridge from a short distance north of the highest point

Footnotes

References

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External links

{{coord, 56.17607, -5.72324, type:landmark_region:GB_source:enwiki-osgb36(NM690044), display=title Islands of the Inner Hebrides Uninhabited islands of Argyll and Bute National scenic areas of Scotland