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  • Alpine Glacier Deposits: Landforms & Erosion Features
    Alpine glaciers leave behind a variety of deposits, sculpted by their movement and the erosion of rock and sediment. Here are some key deposits:

    Landforms:

    * Cirques: Bowl-shaped depressions formed by glacial erosion at the head of a valley.

    * Aretes: Sharp, jagged ridges formed when two cirques erode back-to-back.

    * Horns: Sharp, pointed peaks formed when three or more cirques erode towards each other.

    * U-shaped valleys: Wide, deep valleys with steep sides, carved out by glaciers.

    * Hanging valleys: Smaller valleys that join a larger valley at a higher elevation, formed by tributary glaciers.

    * Truncated spurs: Triangular-shaped landforms that mark the point where a tributary valley joins the main valley.

    * Moraines: Mounds of rock and sediment deposited by a glacier.

    * Lateral moraines: Found along the sides of a glacier.

    * Medial moraines: Formed when two glaciers merge and their lateral moraines join.

    * Terminal moraines: Mark the furthest extent of a glacier.

    * Recessional moraines: Series of moraines marking stages of retreat.

    * Outwash plains: Areas in front of a glacier where meltwater has deposited sediment, forming flat plains.

    * Kettles: Depressions formed when blocks of ice are left behind by a receding glacier and melt.

    * Drumlins: Elongated, streamlined hills composed of glacial till.

    * Eskers: Long, winding ridges of sand and gravel deposited by meltwater streams flowing beneath a glacier.

    Sediments:

    * Till: Unsorted, poorly stratified sediment deposited directly by a glacier.

    * Outwash: Sorted and stratified sediment deposited by glacial meltwater.

    * Loess: Fine-grained, windblown silt deposited by glacial meltwater.

    Other:

    * Glacial lakes: Lakes formed by glacial erosion or the damming of meltwater.

    * Glacial erratics: Large boulders transported by glaciers from their source locations and deposited elsewhere.

    These deposits are a testament to the powerful forces of alpine glaciation and provide valuable insights into past glacial activity.

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