Black Down is the highest hill in the

Mendip Hills The Mendip Hills (commonly called the Mendips) is a range of limestone hills to the south of Bristol and Bath in Somerset, England. Running from Weston-super-Mare and the Bristol Channel in the west to the Frome valley in the east, the hills ...

Somerset ( en, All The People of Somerset) , locator_map = , coordinates = , region = South West England , established_date = Ancient , established_by = , preceded_by = , origin = , lord_lieutenant_office =Lord Lieutenant of Somerset , lord_ ...

, in south-western

England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...

. Black Down lies just a few miles eastward of the

Bristol Channel The Bristol Channel ( cy, Môr Hafren, literal translation: "Severn Sea") is a major inlet in the island of Great Britain, separating South Wales from Devon and Somerset in South West England. It extends from the lower estuary of the River Seve ...

Weston-super-Mare Weston-super-Mare, also known simply as Weston, is a seaside town in North Somerset, England. It lies by the Bristol Channel south-west of Bristol between Worlebury Hill and Bleadon Hill. It includes the suburbs of Mead Vale, Milton, Oldmixon ...

, and provides a view over the

Chew Valley The Chew Valley is an affluent area in North Somerset, England, named after the River Chew, which rises at Chewton Mendip, and joins the River Avon at Keynsham. Technically, the area of the valley is bounded by the water catchment area of t ...

. The summit is marked with an

Ordnance Survey , nativename_a = , nativename_r = , logo = Ordnance Survey 2015 Logo.svg , logo_width = 240px , logo_caption = , seal = , seal_width = , seal_caption = , picture = , picture_width = , picture_caption = , formed = , preceding1 = , di ...

trig point A triangulation station, also known as a trigonometrical point, and sometimes informally as a trig, is a fixed surveying station, used in geodetic surveying and other surveying projects in its vicinity. The nomenclature varies regionally: they a ...

, the base of which has been rebuilt by the Mendip Hills AONB authority. The shortest route of ascent goes from the

Burrington Combe Burrington Combe is a Carboniferous Limestone gorge near the village of Burrington, on the north side of the Mendip Hills Area of Outstanding Natural Beauty, in North Somerset, England. "Combe" or "coombe" is a word of Celtic origin found i ...

car park A parking lot (American English) or car park (British English), also known as a car lot, is a cleared area intended for parking vehicles. The term usually refers to an area dedicated only for parking, with a durable or semi-durable surfac ...

and is approximately 1 km long. Black Down is an

open-access Open access (OA) is a set of principles and a range of practices through which research outputs are distributed online, free of access charges or other barriers. With open access strictly defined (according to the 2001 definition), or libre op ...

area mostly consisting of

moors The term Moor, derived from the ancient Mauri, is an exonym first used by Christian Europeans to designate the Muslim inhabitants of the Maghreb, the Iberian Peninsula, Sicily and Malta during the Middle Ages. Moors are not a distinct or ...

, with dense cover of associated vegetation such as heather and

bracken Bracken (''Pteridium'') is a genus of large, coarse ferns in the family Dennstaedtiaceae. Ferns (Pteridophyta) are vascular plants that have alternating generations, large plants that produce spores and small plants that produce sex cells (eggs ...

. According to a local organization's newsletter, the name "Black Down" comes from the

Saxon The Saxons ( la, Saxones, german: Sachsen, ang, Seaxan, osx, Sahson, nds, Sassen, nl, Saksen) were a group of Germanic * * * * peoples whose name was given in the early Middle Ages to a large country (Old Saxony, la, Saxonia) near the Nor ...

word 'Blac' or 'Bloec' meaning bleak, 'Dun' meaning down or fort.

Geology

The rocks form an

anticline In structural geology, an anticline is a type of fold that is an arch-like shape and has its oldest beds at its core, whereas a syncline is the inverse of an anticline. A typical anticline is convex up in which the hinge or crest is the ...

with the oldest being

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 ...

at the summit, which was deposited during the

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, whe ...

period between 400 and 362 million years ago, with younger Portishead Beds of limestone and Black Nore Sandstone on either side. As a result of the Variscan mountain-building, the Mendip area now comprises at least four anticlinal fold structures, with an east-west trend, each with a core of older

sandstone and

Silurian The Silurian ( ) is a geologic period and system spanning 24.6 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the shortest period of the Paleozo ...

volcanic rocks. The Devonian and Silurian rocks are generally more resistant to weathering than the limestone, and form some of the highest points on the hills, including the highest at Black Down, 325 metres (1068 ft) above sea level. Black Down is a

moorland Moorland or moor is a type of habitat found in upland areas in temperate grasslands, savannas, and shrublands and montane grasslands and shrublands biomes, characterised by low-growing vegetation on acidic soils. Moorland, nowadays, generally ...

area, with its steeper slopes covered in

(''Pteridium'') and its flatter

summit A summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. The topography, topographic terms acme, apex, peak (mountain peak), and zenith are synonymous. The term (mountain top) is generally used ...

in heather (''Calluna'') and grasses rather than the pasture which covers much of the plateau.

Beacon Batch round barrow cemetery

The summit area of Black Down is known as Beacon Batch. It is the site of

Bronze Age The Bronze Age is a historic period, lasting approximately from 3300 BC to 1200 BC, characterized by the use of bronze, the presence of writing in some areas, and other early features of urban civilization. The Bronze Age is the second pri ...

round barrow A round barrow is a type of tumulus and is one of the most common types of archaeological monuments. Although concentrated in Europe, they are found in many parts of the world, probably because of their simple construction and universal purpose. ...

s, one of which also anchors the concrete trig point. All of the barrows show signs of being opened in the past, but the only recorded excavation was done by Rev J. Skinner in 1820. The main group of barrows consists of nine

bowl barrow A bowl barrow is a type of burial mound or tumulus. A barrow is a mound of earth used to cover a tomb. The bowl barrow gets its name from its resemblance to an upturned bowl. Related terms include ''cairn circle'', ''cairn ring'', ''howe'', ''ke ...

s, one

bell barrow A bell is a directly struck idiophone percussion instrument. Most bells have the shape of a hollow cup that when struck vibrates in a single strong strike tone, with its sides forming an efficient resonator. The strike may be made by an intern ...

and one

disc barrow A disc barrow is a type of tumulus or round barrow, a variety of fancy barrow identified in English Heritage's Monument Class Descriptions. A disc barrow comprises a circular or oval-shaped flat platform, defined by a continuous earthen bank and ...

. There is also an outlying group of three bowl barrows to the west, and a group of two bowl barrows about to the southeast of the main group.

Bombing decoy town

During

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

a bombing decoy town was constructed on Black Down, which was intended to represent the blazing lights of a town which had omitted to follow black-out regulations. The decoy, known under the code name

Starfish Starfish or sea stars are star-shaped echinoderms belonging to the class Asteroidea (). Common usage frequently finds these names being also applied to ophiuroids, which are correctly referred to as brittle stars or basket stars. Starfish ...

from the original code SF (Special Fire) used fires of creosote and water to simulate incendiary bombs exploding. In addition glow boxes were used to simulate the streets and railways of

Bristol Bristol () is a city, ceremonial county and unitary authority in England. Situated on the River Avon, it is bordered by the ceremonial counties of Gloucestershire to the north and Somerset to the south. Bristol is the most populous city in ...

, the light bulbs were powered by electrical generators, powered by Coventry Climax petrol engines contained in two bunkers. It was laid out by

Shepperton Film Studios Shepperton Studios is a film studio located in Shepperton, Surrey, England, with a history dating back to 1931. It is now part of the Pinewood Studios Group. During its early existence, the studio was branded as Sound City (not to be confused w ...

, based on

aerial photograph Aerial photography (or airborne imagery) is the taking of photographs from an aircraft or other airborne platforms. When taking motion pictures, it is also known as aerial videography. Platforms for aerial photography include fixed-wing ai ...

s of the city's railway

marshalling yard A classification yard (American and Canadian English (Canadian National Railway use)), marshalling yard (British, Hong Kong, Indian, Australian, and Canadian English (Canadian Pacific Railway use)) or shunting yard (Central Europe) is a railway ya ...

s.Brown, Donald (1999). ''Somerset v Hitler: Secret Operations in the Mendips 1939 - 1945''. Newbury: Countryside Books. . pages 165-177 The decoys were fitted with dim red lights, simulating activities like the stoking of

steam locomotive A steam locomotive is a locomotive that provides the force to move itself and other vehicles by means of the expansion of steam. It is fuelled by burning combustible material (usually coal, oil or, rarely, wood) to heat water in the locomot ...

s. Burning bales of straw soaked in creosote were used to simulate the effects of

incendiary bombs Incendiary weapons, incendiary devices, incendiary munitions, or incendiary bombs are weapons designed to start fires or destroy sensitive equipment using fire (and sometimes used as anti-personnel weaponry), that use materials such as napalm, th ...

dropped by the first wave of Pathfinder night bombers; meanwhile, incendiary bombs dropped on the correct location were quickly smothered, wherever possible. Drums of oil were also ignited to simulate the effect of a blazing city or town, with the aim of fooling subsequent waves of bombers into dropping their bombs on the wrong location. The site was home to a

Z battery A Z Battery was a short range anti-aircraft weapon system, launching diameter rockets from ground-based single and multiple launchers, for the air defence of Great Britain in the Second World War. The rocket motors were later adapted with a ...

of anti aircraft rockets. The success of this endeavour is questionable, with no ground indications that the hills were used as targets. Piles of stones (known as

cairn A cairn is a man-made pile (or stack) of stones raised for a purpose, usually as a marker or as a burial mound. The word ''cairn'' comes from the gd, càrn (plural ). Cairns have been and are used for a broad variety of purposes. In prehis ...

s) were also created to prevent enemy aircraft from using the hilltop as a landing site.

Heritage at Risk

Both the World War II bombing decoy complex and round barrow cemetery are included on the

Heritage at Risk Register An annual ''Heritage at Risk Register'' is published by Historic England. The survey is used by national and local government, a wide range of individuals and heritage groups to establish the extent of risk and to help assess priorities for actio ...

maintained by

English Heritage English Heritage (officially the English Heritage Trust) is a charity that manages over 400 historic monuments, buildings and places. These include prehistoric sites, medieval castles, Roman forts and country houses. The charity states that i ...

due to erosion from the visitors to the site. A three-year project from 2013 to 2016 has been funded by the

Heritage Lottery Fund The National Lottery Heritage Fund, formerly the Heritage Lottery Fund (HLF), distributes a share of National Lottery funding, supporting a wide range of heritage projects across the United Kingdom. History The fund's predecessor bodies were ...

, and hosted by the Mendip Hills Area of Outstanding Natural Beauty Unit, has been established to "raise awareness of the importance of Black Down and the Burrington Commons".

References

External links

{{coord, 51.31156, N, 2.74170, W, region:GB_source:enwiki-osgb36(ST484572), display=title Marilyns of England Mendip Hills Hills of Somerset Structures on the Heritage at Risk register in Somerset