![]() They are agents of deposition along shorelines.Ĭ. They are agents of erosion along shorelines.ī. What is significant about longshore currents?Ī. They involve movement of water and sediment away from the shoreline.ġ3. They involve movement of water and sediment parallel to the shoreline.ĭ. They involve movement of water and sediment toward the shoreline.Ĭ. They involve movement of water and sediment perpendicular to the shoreline.ī. How are longshore currents and longshore drift best described?Ī. Offshore sand bars are eroded and beaches are built up.ġ2. Beaches are eroded and the sand moves to offshore bars.ĭ. More erosion occurs in bays than on headlands.Ĭ. There is a higher percentage of fine-grained sand on beaches.ī. During stormy periods in winter, what happens to beaches?Ī. It is focused on headlands and erodes them back.ġ1. It is focused on bays and cuts them deeper.Ĭ. It is equally distributed between bays and headlands.ī. When incoming waves reach an irregular coastline, how is their energy distributed?Ī. the sea floor remains shallow for a long distance offshore.ġ0. the sea floor deepens rapidly offshore.ĭ. the nearby land has a rugged topography of hills and mountains.Ĭ. Barrier island beaches generally develop where:ī. volcanic island chains along coastlines.ĩ. ![]() submergent passive continental margins.Ĭ. Barrier islands are most common in regions where there are:ī. A depositional coastal feature that form where incoming tidal currents carry sediments eroded from the ocean-beach side of a barrier-island inlet and deposit them in the lagoon or bay side of an inlet is called:Ĩ. ![]() Which of the following is NOT a depositional coastal landform?ħ. Low ridges of sand that parallel coastlines and rise above sea level are called:Ħ. Along emergent coastlines, such as along many parts of California's coastline, the interactions of these gradual sea level changes and a slowly rising coastline has resulted in the formation of:ĥ. Over time, sea level has risen and fallen many times in the past during the ice ages. Large rocky outcrops that have resisted wave erosion and remain as small isolated islands offshore as the beach and sea cliff continues to erode landward are called:Ĥ. Exposed wave-cut cliffs and platforms, and marine terraces are most frequently found along:ģ. The region on the East Coast (including the Delmarva Peninsula, Chesapeake Bay, and Delaware Bay) is what kind of Coast?Ģ. And they make it a beautiful place to live.\)ġ. It takes thousands and thousands of years for these processes to shape the land. Deposition can form beaches like this one, and sand dunes, or bars and spits. Deposition is where the waves slow down and they drop any rocks or pebbles they are carrying. These type of erosion create landforms such as headlands and bays, arches, caves, stacks and stumps.Īnother process that creates coastal landforms is deposition. And attrition where rocks carried by the sea are knocked together and broken down into smaller and smoother pieces. ![]() There is also abrasion which is the action of pebbles grinding against the rock surface like sandpaper. Different types of erosion include hydraulic action where the force of the wave traps air into the rock and breaks it apart. Erosion happens when waves wear away the land. Like coastlines around the world it is made up of different landforms.Ĭoastal landforms are created through processes such as erosion and deposition. Hi I'm Bella, and I live here on the Jurassic Coast in Dorset.
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