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S-waves
shear wave; a seismic body wave that shakes the ground back and forth perpendicular to the direction the wave is moving.
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Love waves
surface seismic waves that cause horizontal shifting of the Earth during an earthquake.
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Focus
A central point or region, such as the point at which an earthquake starts.
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Epicenter
the point on the earth's surface vertically above the focus of an earthquake.
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Levees
an embankment built to prevent the overflow of a river.
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Cut banks
the outside bank of a water channel (stream), which is continually undergoing erosion.
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Oxbow lakes
a curved lake formed at a former oxbow where the main stream of the river has cut across the narrow end and no longer flows around the loop of the bend.
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Terraces
step-like landform
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Escarpments
a long, steep slope, especially one at the edge of a plateau or separating areas of land at different heights.
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Mass wastage
the geomorphic process by which soil, sand, regolith, and rock move downslope typically as a mass, largely under the force of gravity, but frequently affected by water and water content as in submarine environments and mudslides.
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Slump
a form of mass wasting that occurs when a coherent mass of loosely consolidated materials or rock layers moves a short distance down a slope.
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Submergent coastlines
stretches along the coast that have been inundated by the sea due to a relative rise in sea levels.
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Emergent coastlines
stretches along the coast that have been exposed by the sea due to a relative fall in sea levels.
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Jetty
a breakwater constructed to protect or defend a harbor, stretch of coast, or riverbank.
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Groin
a rigid hydraulic structure built from an ocean shore (in coastal engineering) or from a bank (in rivers) that interrupts water flow and limits the movement of sediment; a large jetty
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Breakwall
a wall or other structure designed to protect coastal land from the battering of the waves
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Sea wall
a wall or embankment erected to prevent the sea from encroaching on or eroding an area of land.
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Barrier island
a long narrow island lying parallel and close to the mainland, protecting the mainland from erosion and storms.
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Tombolo
a bar of sand or shingle joining an island to the mainland.
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Tied islands
an island connected with the mainland by a tombolo
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Zone of saturation
the area in an aquifer, below the water table, in which relatively all pores and fractures are saturated with water.
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Zone of aeration (vadose Zone)
Region in the ground in which pore spaces are filled with air.
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Permeability
the state or quality of a material or membrane that causes it to allow liquids or gases to pass through it.
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