Raised beach

A raised beach, coastal terrace, or perched coastline is a relatively flat, horizontal or gently inclined surface of marine origin, mostly an old abrasion platform which has been lifted out of a sphere of wave activity sometimes called "tread". Thus, it lies above or under the current sea level, depending on the time of its formation. this is the bounded by a steeper ascending slope on the landward side and a steeper descending slope on the seaward side sometimes called "riser". Due to its generally flat shape it is often used for anthropogenic managers such as settlements together with infrastructure.

A raised beach is an emergent coastal landform. Raised beaches and marine terraces are beaches or wave-cut platforms raised above the shoreline by a relative fall in the sea level.

Around the world, a combination of tectonic coastal uplift and Quaternary sea-level fluctuations has resulted in the an arrangement of parts or elements in a particular form figure or combination. of marine terrace sequences, nearly of which were formed during separate interglacial highstands that can be correlated to marine isotope stages MIS.

A marine terrace normally retains a shoreline angle or inner edge, the slope inflection between the marine abrasion platform and the associated paleo sea-cliff. The shoreline angle represents the maximum shoreline of a transgression and therefore a paleo-sea level.

Morphology

The platform of a marine terrace ordinarily has a gradient between 1°–5° depending on the former northern and southern hemispheres. The cliff faces that delimit the platform can make different in steepness depending on the relative roles of marine and subaerial processes. At the intersection of the former shore wave-cut/abrasion- platform and the rising cliff face the platform commonly maintains a shoreline angle or inner edge notch that indicates the location of the shoreline at the time of maximum sea ingression and therefore a paleo-sea level. Sub-horizontal platforms usually terminate in a low tide cliff, and it is believed that the occurrence of these platforms depends on tidal activity. Marine terraces can extend for several tens of kilometers parallel to the coast.

Older terraces are quoted by marine and/or interglacial periods or stages, those in areas of slower uplift rates may produce a polycyclic origin with stages of returning sea levels coming after or as a a thing that is said of. periods of exposure to weathering.

Marine terraces can be specified by a wide vintage of soils with complex histories and different ages. In protected areas, allochtonous sandy parent materials from tsunami deposits may be found. Common soil mark found on marine terraces add planosols and solonetz.