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A view of Sandwood sea stack, named "Am Buachaille", meaning "The Shepherd". As wikipedia explains, "a stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast. Stacks are formed when part of a headland is eroded by hydraulic action, which is the force of the sea or water crashing against the rock. The force of the water weakens cracks in the headland, causing them to later collapse, forming free-standing stacks and even a small island. Stacks typically form in horizontally bedded sedimentary rocks particularly on limestone cliffs, because of the medium resistance to erosion. a more resistant layer may form a capstone. Cliffs with weaker rock such as clay tend to slump and erode too quickly to form stacks, while harder rocks such as granite erode in different ways. The sea attacks small cracks and opens them. The cracks then gradually get larger and turn into a small cave. When the cave wears right through the headland, an arch forms. Further erosion causes the arch to collapse, leaving the pillar of hard rock standing away from the coast called a stack. Stacks are often important sites for nesting seabirds".

Une vue de l'aiguille de roche qui émerge près de la plage de Sandwood, en anglais "sea stack". Cette aiguille est appelée "Am Buachaille" en gaélique, ce qui signifie "le berger". Wikipedia nous renseigne : "un stack est un pilier, une aiguille ou un pinacle de pierre détaché du littoral par l'érosion et pouvant former ou non une île. Les stacks sont pour la plupart présents le long de côtes formées de falaises et une arche naturelle littorale forme généralement un stack lorsqu'elle s'effondre. Les stacks sont parfois identifiés dans les légendes locales comme étant des personnages humains ou mythologiques pétrifiés. Ils constituent également des refuges pour la faune sauvage et notamment les oiseaux de mer qui y nidifient."

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Photo Information
  • Copyright: Pendragon Hauru (Pendragon) Silver Star Critiquer/Silver Note Writer [C: 39 W: 3 N: 42] (327)
  • Genre: Places
  • Medium: Black & White
  • Date Taken: 2008-06-14
  • Categories: Nature
  • Exposure: f/7.6, 1/640 seconds
  • More Photo Info: view
  • Photo Version: Original Version
  • Date Submitted: 2009-03-11 4:26
Viewed: 1676
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