12/12/2023 0 Comments Sea stack landform![]() ![]() Shore platforms are formed where cliff recession is active due to powerful bombardment of cliff base by up-rushing breaker waves and effective removal of eroded materials by backwash (undertow currents). ![]() The origin and development of wave-cut platforms is related to cliff recession. Rock-cut flat surfaces in front of cliffs are called wave-cut platforms or simply shore platforms (fig. (vii) Rate of removal of debris from the cliff base by the backwash or the undertow currents etc. (ii) Susceptibility to chemical erosion, mass movement and sub-aerial erosion, The rate of cliff recession varies both in space and time depending on the following conditions: If the notch at the base of the cliff is extended landward to such an extent that the support to the cliff crest is weakened the overhanging head of the cliff breaks and falls down resulting into gradual recession of the cliffs landward. There is gradual extension of notch landward due to continuous wave attack with the result the crest of the cliff overhangs the notch. This results in the formation of notch and the coast becomes vertical. The formation of sea cliff begins with the erosion of coastal rocks through the mechanisms of hydraulic actions and abrasion by breaker waves (swash or surf currents). (3) Composite cliffs of chalk overlying clay (fig, 20.5D) and of inter-bedded sandstones and shale’s (fig. (2) Weak cliffs developed on clays and shales (fig. 20.5A) and horizontally bedded sandstones (fig. It does not store any personal data.(1) Resistant cliffs formed on chalk (fig. The cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. The cookie is used to store the user consent for the cookies in the category "Performance". This cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other. ![]() The cookies is used to store the user consent for the cookies in the category "Necessary". The cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional". The cookie is used to store the user consent for the cookies in the category "Analytics". These cookies ensure basic functionalities and security features of the website, anonymously. Necessary cookies are absolutely essential for the website to function properly. So please stick to the marked path and let the Cliffs be what they are an active, dynamic landscape that provides a home to thousands of birds and a world-class visitor attraction that tells the amazing story of our geological journey and a vital part of the Burren and Cliffs of Moher UNESCO Global Geopark. The Cliffs are under constant attack from the enormous waves that batter them every day and this leads to erosion which results in fairly regular rockfalls. Coastal erosion is likely to accelerate due to global warming. The prominent sea stack below O’Brien’s Tower is the result of thousands of years of coastal erosion which has removed all the surrounding rock, leaving it standing isolated from the cliff to which it was once attached. ![]() So, when you look at the magnificent Cliffs of Moher you are watching a 320-million-year-old story of rivers, mud, mountains and continents colliding and the tracks of mysterious creatures that lived and died and are preserved in those layers of rock. ![]()
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