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The formation of a wave-cut platform. Wave-cut platforms form when destructive waves hit against the cliff face, causing an undercut between the high and low water marks, mainly as a result of abrasion, corrosion and hydraulic action, creating a wave-cut notch. This notch then enlarges into a cave.
When the arch collapses as the coastline recedes further a stack is left behind on the wave-cut platform. The best-known example in Germany is the Lange Anna on Heligoland, while, in England, a prominent example are Old Harry Rocks in Dorset. Ocean waves crashing against sea cliffs at Cape Pillar, Tasmania in Australia.
The SSSI is in two parts. The northern section is the wave-cut platform alongside Ogmore-by-Sea. The southern section, with a short gap, covers both the intertidal areas and the cliffs and grassy cliff-tops of Dunraven Bay, Trwyn y Witch headland and the valleys and shoreline of Cwm Mawr and Cwm Bach. [2]
The formation of a marine terrace follows this general process: A wave cut platform must be carved into bedrock (high wave energy is needed for this process). Although this is the first step to the process for the formation of a marine terrace, not all wave cut platforms will become a marine terrace.
File:Wavecut platform small.jpg Downsampled to 1595x800, virtually no detail loss, but got rid of edge (compression) effects and softness, image is still large enough. A composite of three images taken from the coastal path at Southerndown. It's a little soft at full resolution, but I think this is a good illustration of wave-cut platform ...
Furthermore, shore platforms are formed by denudation and marine-built terraces arise from accumulations of materials removed by shore erosion. [2] Thus, a marine terrace can be formed by both erosion and accumulation. However, there is an ongoing debate about the roles of wave erosion and weathering in the formation of shore platforms. [10]
This finding was striking because beaches are often considered an extra buffer between the sea and the cliffs. "The waves, when they're large enough, can actually pick up the sand and use it as an ...
(Cliffs with weaker rock, such as claystone or highly jointed rock, tend to slump and erode too quickly to form stacks, while harder rocks such as granite erode in different ways.) [4] The formation process usually begins when the sea attacks lines of weakness, such as steep joints or small fault zones in a cliff face.