unt.instructure.com/courses/34766/assignments/721720?module_item_id=D2081531Continental margins occupy the perimeters of ocean basins where they meet the continents. Many continental margins exhibit three distinct segments: a shelf, slope, andrise. Shelves (most landward segments) are flooded extensions of the continents. Slopes (middle segment) are steep as the name implies, and represent the approximateboundary between oceanic and continental crust. The rise (most seaward segment) is a gradual descent to the deep basin.Ocean basin floors consist of flat plains (called abyssal plains) dotted with seamounts and also include deep trenches. Seamounts are underwater volcanoes. Most seamountsare extinct. Often they form at mid-ocean ridges (discussed below). Embedded in moving plates of lithosphere, seamounts migrate away from mid-ocean ridges and graduallysubside. Guyots are seamounts with flat tops, formed by waves eroding a volcano that once rose above sea level.Ocean trenches are long narrow features of the ocean floor, which form where moving plates plunge into the mantle below. This setting is called a subduction zone. Trencheare the deepest parts of oceans; the deepest trenches are approximately 11 km beneath sea level.Extensive faulting and volcanic structures characterize mid-ocean ridges (sometimes called spreading centers). Plates on either side of a mid-ocean ridge spread apart fromone another. Mid-ocean ridges average about 1,300 km wide, with a 20-80 km wide central depression called the rift valley, a site of active volcanism. In some places, thevolcanoes extend above sea level to form islands such as Iceland.Assignment1. Sketch and label areas of erosion and deposition resulting from the groin (top), jetty (middle), and breakwater (bottom) in these three maps:LandSeaLongshorecurrentRiverLandSeaLongshorecurrentLandSeaLongshorecurrent22202. Rising seas inundate Jand compounding conntoI

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Jetties are rock walls that are designed to protect the entrance of a harbor from sediment…

1. Sketch and label areas of erosion and deposition resulting from the groin (top), jetty (middle), and breakwater (bottom) in these three maps: Land Seg Longshore current River Land Sea Longshare current Land Sea Longshore current