Laxford

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Laxford Bridge
Location of Laxford Bridge in Sutherland

Laxford is a remote area in the far Northwest Highlands of Scotland around the River Laxford which runs northwest from Loch Stack to Laxford Bay. This bay is an inlet of Loch Laxford, a sea loch and Special Area of Conservation. The river is well known for its salmon fly fishing, indeed the name "Laxford" derives from the Norse for "salmon fjord". [1] The area is important geologically, being a region of shear in the Moine Thrust. A road bridge, Laxford Bridge, crosses the river adjacent to the A838 and A894 roads, the road junction making the spot well known to tourists. Laxford is in Sutherland, in the Highland council area of Scotland; Scourie, 12 kilometres (7.5 miles) away, is the nearest village. The area forms part of the North West Sutherland National Scenic Area, [2] 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. [3]

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River Laxford

Laxford Bridge crossing the River Laxford Bridge - geograph.org.uk - 820724.jpg
Laxford Bridge crossing the River

The River Laxford runs some 7 kilometres (4.3 mi) in a generally northwesterly direction from Loch Stack (by Ben Stack) to Laxford Bay. [4] It has a catchment area of about 170 square kilometres (67 sq mi). [5] The River Laxford is considered one of the more productive salmon rivers in northern Scotland with a catch of over 200 salmon in most seasons. Catches of sea trout, however, have declined in recent years. [6]

Loch Laxford

Islands in Loch Laxford - the main one shown is Eilean a' Mhadaidh Loch Laxford Islands from Cnoc Druim na Coille - geograph.org.uk - 820566 (cropped).jpg
Islands in Loch Laxford the main one shown is Eilean a' Mhadaidh

Laxford Bay is an inlet of Loch Laxford, a fjard sea loch. [7] The loch is a Special Area of Conservation, classified as a large shallow inlet and bay it has a wide variety of marine habitats and species. Water conditions are mostly sheltered because of the reefs and islands but the outer region of the loch is very exposed. It has the most extensive shoreline of sheltered sediment in the far northwest of Scotland. [7] There are many small islands in the loch.

Geology

New A838 road cutting showing grey felsic gneiss, intruded with black gneiss, then intruded with pink granite and later deformed in the Laxfordian event Road Cutting - geograph.org.uk - 820828.jpg
New A838 road cutting showing grey felsic gneiss, intruded with black gneiss, then intruded with pink granite and later deformed in the Laxfordian event

Laxford is in the region of the Lewisian gneiss complex, deformed by the Moine Thrust, which occurred during the Caledonian Orogeny. To the south are Scourian high-grade metamorphic rocks, some 3,000 million years old, intruded with undeformed Scourie dykes 2,400 million years ago whereas to the north are lower-grade metamorphic rocks, which were later deformed and metamorphosed during the Laxfordian orogeny. At Laxford, layers of pink granite and pegmatite intruded into hot gneiss about 1,750 million years ago. Alternating layers of black mafic gneiss and grey felsic gneiss are to be seen, cut across by steeply dipping sheets of granite and pegmatite. [8] [9]

This area has been studied for over 100 years. First recognised by Peach et al. (1907), the area is made up of predominantly gneiss. F. Davies released a series of articles about the area in the 1970s, particularly in relation to the Scouie dyke swarms that cross cut the lewisian gneiss in the region. Further work in the area has investigated the nature of the Laxford shear zone (for example, the current geologist Katherine Goodenough).

The Laxford area lies on the Laxfordian Shear Zone, which defines the boundary between the central region and the northern region of the lewisian gneiss. This is one of the few areas what has experienced all three metamorphic events of the lewisian gneiss: the Badcallian (2.8-2.7Ga), the Inverian (2.6-2.5Ga) and the Laxfordian (1.8-1.3Ga) however some academics argue that the Laxfordian spans as recent as 1.0Ga. Each metamorphism event has, to an extent, overprinted the next. Thermobarometry has been used to attempt to identify the peak temperatures and pressures of each metamorphic event.

Laxford Bridge

At Laxford Bridge the A838 road, coming northwest from Lairg on Scotland's northeast coast, joins the A894 coming from Loch Assynt, which is to the south. The A838 then crosses the river at the bridge and runs northeast to Durness on Scotland's north coast.

Related Research Articles

<span class="mw-page-title-main">Sutherland</span> Historic county in Scotland

Sutherland is a historic county, registration county and lieutenancy area in the Highlands of Scotland. Its county town is Dornoch. Sutherland borders Caithness and Moray Firth to the east, Ross-shire and Cromartyshire to the south and the Atlantic to the north and west. Like its southern neighbour Ross-shire, Sutherland has some of the most dramatic scenery in Europe, especially on its western fringe where the mountains meet the sea. These include high sea cliffs, and very old mountains composed of Precambrian and Cambrian rocks.

<span class="mw-page-title-main">Moine Thrust Belt</span> Fault in Highland, Scotland, UK

The Moine Thrust Belt or Moine Thrust Zone is a linear tectonic feature in the Scottish Highlands which runs from Loch Eriboll on the north coast 190 kilometres (120 mi) south-west to the Sleat peninsula on the Isle of Skye. The thrust belt consists of a series of thrust faults that branch off the Moine Thrust itself. Topographically, the belt marks a change from rugged, terraced mountains with steep sides sculptured from weathered igneous, sedimentary and metamorphic rocks in the west to an extensive landscape of rolling hills over a metamorphic rock base to the east. Mountains within the belt display complexly folded and faulted layers and the width of the main part of the zone varies up to 10 kilometres (6.2 mi), although it is significantly wider on Skye.

<span class="mw-page-title-main">Ben Stack</span>

Ben Stack is a mountain in Sutherland, in the northwest of Scotland. It is 721 m (2,365 ft) high. It lies southeast of Laxford Bridge and northwest of Loch More along the A838 road, and just west of Loch Stack.

<span class="mw-page-title-main">Torridon Group</span>

In geology, the term Torridonian is the informal name for the Torridonian Group, a series of Mesoproterozoic to Neoproterozoic arenaceous and argillaceous sedimentary rocks, which occur extensively in the Northwest Highlands of Scotland. The strata of the Torridonian Group are particularly well exposed in the district of upper Loch Torridon, a circumstance which suggested the name Torridon Sandstone, first applied to these rocks by James Nicol. Stratigraphically, they lie unconformably on gneisses of the Lewisian complex and their outcrop extent is restricted to the Hebridean Terrane.

The Northwest Highlands are located in the northern third of Scotland that is separated from the Grampian Mountains by the Great Glen. The region comprises Wester Ross, Assynt, Sutherland and part of Caithness. The Caledonian Canal, which extends from Loch Linnhe in the south-west, via Loch Ness to the Moray Firth in the north-east splits this area from the rest of the country. The city of Inverness and the town of Fort William serve as gateways to the region from the south.

<span class="mw-page-title-main">Ben More Assynt</span>

Ben More Assynt is a mountain in Assynt in the far north-west of Scotland, 30 kilometres north-northeast of Ullapool. The name translates as "big mountain of Assynt", and with a height of 998 metres it is the highest point in Sutherland.

<span class="mw-page-title-main">Eriboll</span> Human settlement in Scotland

Eriboll is a village in Sutherland, Scotland. The village is situated on the south eastern shore of Loch Eriboll, in the northern part of the former county of Sutherland.

<span class="mw-page-title-main">Fanagmore</span> Human settlement in Scotland

Fanagmore is a hamlet in Sutherland, Highland, in far northwestern Scotland. It lies on the south shore of Loch Laxford, an inlet of the Atlantic Ocean. Fanagmore consists of three properties, a few farm buildings, a boat launch and a small harbour. There are tourist cruises from the nearby hamlet of Tarbet to Handa Island.

<span class="mw-page-title-main">North West Highlands Geopark</span>

The North West Highlands Geopark is a geopark in the Scottish Highlands. Awarded UNESCO geopark status in 2004, it was Scotland's first geopark, featuring some of the oldest rocks in Europe, around 3,000 million years old. The park contains many notable geological features, such as the Moine Thrust Belt and Smoo Cave and covers an area of around 2,000 square kilometres (770 sq mi).

<span class="mw-page-title-main">Loch Alsh</span> Sea inlet of Scotland, UK

Loch Alsh is a sea inlet between the isle of Skye in the Inner Hebrides and the Northwest Highlands of Scotland. The name is also used to describe the surrounding country and the feudal holdings around the loch. The area is rich in history, and is increasingly popular with tourists.

<span class="mw-page-title-main">Loch Veyatie</span> Freshwater loch

Loch Veyatie is a large freshwater loch in north-west Scotland. It stretches for 6 km north-westwards from the settlement of Elphin, and lies between Suilven and Cùl Mòr. The loch is located in an area known as the Assynt-Coigach National Scenic Area, one of 40 such areas in Scotland.

<span class="mw-page-title-main">Moine Supergroup</span>

The Moine Supergroup is a sequence of Neoproterozoic metamorphic rocks that form the dominant outcrop of the Scottish Highlands between the Moine Thrust Belt to the northwest and the Great Glen Fault to the southeast. The sequence is metasedimentary in nature and was metamorphosed and deformed in a series of tectonic events during the Late Proterozoic and Early Paleozoic. It takes its name from A' Mhòine, a peat bog in northern Sutherland.

Rhiconich is a remote hamlet, located at the head of Loch Inchard, in Sutherland, Scottish Highlands in the Scottish council area of Highland. Rhiconich is situated 3 miles (4.8 km) north-east of Laxford Bridge and 11 miles (18 km) south-west of Durness on the A838 road. The B801 at Richonich links the village of Kinlochbervie and associated crofting townships such as Oldshoremore to the A838.

Badcall comprises two remote hamlets, called Lower Badcall and Upper Badcall. Upper Badcall, a crofting township, is the larger of the two and is situated on the western shore of Badcall Bay. Lower Badcall is located less than 1 mile to the east on the eastern shore of Badcall Bay. Badcall is on the west coast of Sutherland, Scottish Highlands and is in the Scottish council area of Highland.

<span class="mw-page-title-main">Lewisian complex</span> Suite of Precambrian metamorphic rocks that outcrop in the northwestern part of Scotland

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.

<span class="mw-page-title-main">Hebridean Terrane</span> Part of the Caledonian orogenic belt in northwest Scotland

The Hebridean Terrane is one of the terranes that form part of the Caledonian orogenic belt in northwest Scotland. Its boundary with the neighbouring Northern Highland Terrane is formed by the Moine Thrust Belt. The basement is formed by Archaean and Paleoproterozoic gneisses of the Lewisian complex, unconformably overlain by the Neoproterozoic Torridonian sediments, which in turn are unconformably overlain by a sequence of Cambro–Ordovician sediments. It formed part of the Laurentian foreland during the Caledonian continental collision.

<span class="mw-page-title-main">Laxford Bridge</span> Stone arch bridge in northwest Scotland

The Laxford Bridge is a stone arch bridge in Sutherland, Scotland which carries the A838 across the River Laxford north to Rhiconich and Durness.

<span class="mw-page-title-main">North West Sutherland National Scenic Area</span>

North West Sutherland is a national scenic area (NSA) covering the mountains and coastal scenery of the northwestern part of the county of Sutherland in the highlands of Scotland. The designated area covers the mountains of Foinaven, Arkle and Ben Stack as well as the coastal scenery surrounding Loch Laxford and Handa Island. It is 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. The North West Sutherland NSA covers 26,565 ha in total, consisting of 23,415 ha of land with a further 3,151 ha being marine.

<span class="mw-page-title-main">Loch Merkland</span>

Loch Merkland is a large long inland loch in Sutherland, Northern Scotland. It is located adjacent to the A838 main road which provides almost all access to the Loch and the Merkland Lodge to the south of it. There are many trails and hiking paths in the area, as per usual in the highlands of Scotland. On the Banks just above the Lodge there's also Merkland Cottage meaning there are residents around the Loch.

References

  1. "Laxford Bridge". Mackay Country. Mackay Country Community Trust. Archived from the original on 2 February 2014. Retrieved 1 February 2014.
  2. "Map: North West Sutherland National Scenic Area" (PDF). Scottish Natural Heritage. December 2010. Retrieved 16 May 2018.
  3. "National Scenic Areas". Scottish Natural Heritage. Retrieved 17 January 2018.
  4. "Laxford, River". Gazetteer for Scotland. Gazetteer for Scotland. Archived from the original on 19 February 2014. Retrieved 1 February 2014.
  5. "Laxford, Loch Stack & Loch More". FishPal Limited. Archived from the original on 19 February 2014. Retrieved 2 February 2014.
  6. "River Laxford Salmon Fishing". Trout and Salmon Fishing in Scotland. Archived from the original on 9 December 2013. Retrieved 1 February 2014.
  7. 1 2 "Loch Laxford". Special Areas of Conservation. Joint Nature Conservation Committee. Archived from the original on 3 December 2013. Retrieved 2 February 2014.
  8. Walters, D.J. "Loch Laxford: the Lewisian Gneiss Complex (3)". Rocks of NW Scotland - Geological History. Oxford University, Department of Earth Sciences. Archived from the original on 26 February 2017. Retrieved 2 February 2014.
  9. "Assynt's Geoplogy, The Rock Sequence, The Lewisian". Geology of NW Scotland. School of Earth Sciences, Leeds University & British Geological Surve. Archived from the original on 19 February 2014. Retrieved 2 February 2014.

58°22′29″N5°01′01″W / 58.37472°N 5.01694°W / 58.37472; -5.01694