Definition of Sea stack
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Sea stack Definition from Society & Culture Dictionaries & Glossaries
Environmental Engineering (English ver.)
A small, steep-sided rocky projection above sea level near a cliffed shore.
Sea stack Definition from Encyclopedia Dictionaries & Glossaries
English Wikipedia - The Free Encyclopedia
A stack or seastack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, formed by wave erosion. Stacks are formed over time by wind and water, processes of coastal geomorphology. They 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. Without the constant presence of water, stacks also form when a natural arch collapses under gravity, due to sub-aerial processes like wind erosion. Stacks can provide important nesting locations for seabirds, and many are popular for rock climbing.
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