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  • Coastal Landforms: How Rivers & Erosion Shape Coastlines
    Sediments from rivers and coastal erosion form a variety of landforms along coastlines, including:

    Beaches: These are the most common and obvious landform, formed by the accumulation of sand, gravel, and other sediments deposited by waves, currents, and rivers.

    Sandbars: Submerged or partially submerged ridges of sand that parallel the coastline, often formed by wave action.

    Spits: Narrow, elongated ridges of sand that extend from the coastline, often formed by longshore drift.

    Tombolos: Narrow, sandy isthmuses that connect an island or sea stack to the mainland, often formed by wave action and deposition.

    Barrier Islands: Long, narrow islands that run parallel to the coastline, often separated from the mainland by a lagoon. They are formed by the accumulation of sand, usually from longshore drift.

    Deltas: Fan-shaped landforms at the mouth of a river where it enters a larger body of water. They are formed by the deposition of sediments as the river slows down and loses its carrying capacity.

    Estuaries: Semi-enclosed coastal bodies of water where freshwater from rivers mixes with saltwater from the sea. They are often formed by the deposition of sediments at the mouth of a river.

    Mudflats: Areas of exposed mud that are periodically inundated by the tides. They are formed by the deposition of fine-grained sediments, often from rivers.

    Salt Marshes: Coastal wetlands dominated by grasses and other salt-tolerant plants. They are formed by the deposition of sediments in areas protected from wave action.

    Coastal Dunes: Sand hills that are formed by wind action. They are often found behind beaches and are important for protecting inland areas from storms and erosion.

    The specific landforms that form along a coastline depend on a variety of factors, including:

    * The amount and type of sediment available

    * The wave climate

    * The tidal range

    * The geological history of the area

    All of these landforms are constantly evolving as a result of the ongoing interaction between the land and the sea.

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