Kynance Cove

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Kynance Cove
National Trust Property
Kynance 087.jpg
Kynance Cove, Lizard peninsula, Cornwall
Country England
State Cornwall
Region South West England
District The Lizard
Municipality The Lizard
Location two miles north of Lizard Point on the western side of the Lizard peninsula
Owner Owned by the National Trust
Map Ref: SW6813

Kynance Cove (Cornish: Porth Keynans, meaning ravine cove) is a cove on the eastern side of Mount's Bay, Cornwall within the United Kingdom. It is situated on the Lizard peninsula approximately two miles (3 km) north of Lizard Point.[1] The cove became popular in the early Victorian era, with many distinguished visitors including poet Alfred Tennyson.[2] The BBC has described Kynance Cove as "one of the most beautiful stretches of coastline in the South West." [3]

Kynance Cove and the surrounding coast are owned and managed by the National Trust. It is part of the West Lizard Site of Special Scientific Interest (SSSI) and is in the Cornwall Area of Outstanding Natural Beauty. The Kynance Café (which first opened for business in 1929) relied until recently on spring water, and on a generator for power. When the café became the property of the National Trust in 1999, the Trust renovated it and provided mains water and electricity. Access is via the South-west coastal footpath from the nearby National Trust car park.[4]

Geography and geology[edit]

Much of the Lizard peninsula is known for its botany and geology, and about 375 million years ago the molten rock, which eventually became the Lizard, was about 10 km below the surface of the earth and under immense heat and pressure. One of the rocks (peridotite), is rich in magnesium and iron, and changed through heat and pressure to serpentinite as it pushed upwards from the Moho; the boundary of the earth's crust and mantle. It finally reached the crust's surface, about 30° south of the equator as part of an ocean ridge, in the Rheic Ocean. Over the next 80 million years the Rheic Ocean disappears and the mass of rock heads north crossing the equator about 250 million years ago. The Tropic of Cancer is passed less than 100 million years ago and the rock, which becomes the Lizard, finally reaches 50° north at about the start of the last Ice Age.[5] There are two types of serpentine at Kynance; bastite and tremolite. The rocks at the car park, cliffs to the south and the path to the cove are bastite serpentine, which is the primary serpentine on the Lizard. The rock is coarse grained with large shiny crystals of bastite which give a flecked appearance. The islands and stacks within the cove and the valley are of tremolite serpentine which is fine grained and banded. Tremolite is different to the bastite serpentine because it was subject to higher pressure within the crust.[5]

Kynance Cove is an important site for geologists because of the exposures of the two types of ophiolitic serpentinite, together with granite and gneiss pods within the serpentine. The area has been desiginated as a Geological Conservation Review site.[6][7]

There are a number of small tidal islands and stacks within Kynance Cove which were formed because the tremolite serpentine was broken into blocks and invaded by other types of rock; including granite and basalt. These softer rocks were eroded by the sea and the four largest stacks from left to right are Gull Rock, Asparagus Island and Steeple Rock.[5][8] Asparagus Island is connected to the mainland by a sand tombolo; which is cut off on almost every high tide.[9] At about half-tide a snorting can be heard – the sound of the Devil's bellows a blowhole on Asparagus Island which was caused by the sea tunnelling along a fault.[5] A second blowhole, the Post Office is so named because there is enough suction to post a letter in it![10]

References[edit]

  1. ^ Ordnance Survey,Explorer Map 103, The Lizard, Falmouth and Helston. ISBN 978-0-319-23704-5
  2. ^ Objective One webpage: Kynance visits by Alfred Tennyson.
  3. ^ BBC sevenwonders south-west-cornwall
  4. ^ "Lizard Point and Knynance Cove: Facilities and access". http://www.nationaltrust.org.uk/lizard-point-and-kynance-cove/facilities-and-access/. National Trust. Retrieved 3 July 2014. 
  5. ^ a b c d Bates, Robin; Scolding, Bill (2000). Beneath the Skin of The Lizard. Truro: Cornwall County Council. ISBN 1-898166-09-9. 
  6. ^ "West Lizard". Natural England. Retrieved 30 November 2014. 
  7. ^ "Kynance Cove (Igneous Rocks of South-west England)". JNCC. Retrieved 30 November 2014. 
  8. ^ "Kynance Cove". cornwallbeaches.org.uk. Cornwall's Beaches. Retrieved 3 July 2014. 
  9. ^ Matthews, Graham G. "Kynance Cove". helstonhistory.co.uk. Helston History. Retrieved 3 July 2014. 
  10. ^ Lawman, Jean (1994). A Natural History of the Lizard Peninsula. Redruth and Truro: Institute of Cornish Studies and Dyllansow Truran. ISBN 1-85022-071-9. 

Coordinates: 49°58′26″N 5°13′48″W / 49.974°N 5.230°W / 49.974; -5.230