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Longshore currents move sand along the coast by carrying it parallel to the shoreline. As waves approach the shore at an angle, they generate a current that moves sediments in a zigzag pattern. This process helps to redistribute sand along the coastline.

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1y ago

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Why don't longshore currents form in places where waves hit the shore head-on?

Long-shore currents don't form in places where waves hit the shore head-on because the sand is moving in a zigzag pattern, making it at an angle.


Long ridges of sand parallel to the shore are .?

Long ridges of sand parallel to the shore are known as sandbars. They are formed by the action of waves and currents depositing sand in shallow areas along the coast. Sandbars can shift and change shape over time due to the movement of water.


What is a barrier sand bar?

# A ridge of sand formed in a river or along a shore by the action of waves or currents. # A long mass or low ridge of submerged or partially exposed sand built up in the water along a shore or beach by the action of waves or currents. -dictionary.com


What currents can move sand from one place to another?

Longshore currents, rip currents, tidal currents, and wave action are some of the main currents that can move sand from one place to another along coastlines. These currents can transport sand along the shore or offshore, influencing beach erosion and sediment deposition in different areas.


Along what does longshore currents transport sediment?

Waves approach a shore obliquely (at an angle) due to the effects or the tides, currents the coriolis effect etc. and then retreat due to gravity straight. A good analogue is to roll a marble up a slope at an angle; it will fall more linearly on its return. Hope this helps.


How does a long shore current affect the shore?

It erodes the sand then forms a sandbar and moves the sand down the beach


How are sand and gravel particles moved along the ocean bottom?

Sand is gradually carried down the beach by Longshore Drift.


What are two depositional shoreline features that are created when longshore currents deposit sand?

Spits and barrier islands are two depositional shoreline features created when longshore currents deposit sand. Spits are elongated sandbars that extend from the coast into open water, while barrier islands are long, narrow offshore deposits of sand running parallel to the shore. Both features are formed by the gradual accumulation of sand carried by longshore currents along coastlines.


Sand that accumulates in a long pile along the shore?

sandbar


What kind of landforms do long shore drift and long shore currents produce?

Longshore drift and longshore currents can produce landforms such as spits, tombolos, barrier islands, and sand dunes. These landforms are typically found along coasts with significant wave action and sediment movement.


How are spit and trombolo alike?

When you have longshore currents that transport the sand along a beach, they can create a spit where there is a projection along the coast. Spits develop from a wave train that is oblique to the shore causeing the sand to be deposited longitudinally projecting from the protruding point on the shore. They are attached to the shore at one end. Trombolos can occur when currents create a bar from the beach out of a large quantity of oceanic sediment called a stack. A trombolo is somewhat like a large ripple created from the stack accumulation. The are alike in a general sense of oceanic deposits but are very different in that the currents are oblique (tombolo) and more perpindicular (spit).


What effect does a long shore current have?

A long shore current can transport sediment along the coastline, causing erosion in some areas and deposition in others. It can also impact beach morphology, influencing the shape and size of beaches. Additionally, longshore currents can create hazardous swimming conditions by generating strong rip currents.