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  • Continental-Continental Convergence: Mountain Formation & Geological Impacts
    When plates with continental crust push together, it's called a continental-continental convergence. This process leads to a variety of geological features and events, including:

    * Mountain Ranges: The immense pressure from the colliding plates causes the land to buckle and fold, creating towering mountain ranges like the Himalayas and the Alps.

    * Plateaus: Extensive, flat, elevated areas can form as the crust is uplifted and compressed.

    * Fault Zones: The immense pressure creates weaknesses in the crust, leading to the formation of fault zones. These faults can cause earthquakes when they slip.

    * Volcanism: Although less common than with oceanic-continental convergence, some volcanism can occur. The collision can thicken the crust, allowing magma to rise through the weaker zones.

    * Metamorphism: The intense heat and pressure associated with the collision can change the existing rocks, creating metamorphic rocks.

    Key Points:

    * No Subduction: Unlike oceanic-continental collisions, continental-continental collisions do not involve subduction, as both plates are too buoyant to sink.

    * Crustal Thickening: The primary result is the thickening of the continental crust.

    * Significant Uplift: The pressure from the collision causes significant uplift, leading to the formation of mountains and plateaus.

    Examples:

    * Himalayas: The collision of the Indian and Eurasian plates created the Himalayan mountain range.

    * Alps: The collision of the African and Eurasian plates formed the Alps.

    * Appalachian Mountains: The collision of the North American and African plates formed the Appalachians, though they are now eroded and much older than the Himalayas or Alps.

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