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    Along which of these plate boundaries interactions, one can notice the formation of accretionary prism/wedge.
    Question

    Along which of these plate boundaries interactions, one can notice the formation of accretionary prism/wedge.

    A.

    Mid Oceanic Ridge Oceanic Plate divergence boundary

    B.

    Transform fault boundary

    C.

    Continent-Continent convergence boundary

    D.

    Ocean-Continent convergence boundary

    Correct option is D

    Introduction

    • Accretionary prisms (also called accretionary wedges) are wedge-shaped masses of sediment that accumulate at convergent plate boundaries.
    • They form through the process of subduction, where one tectonic plate descends beneath another.
    • As the oceanic plate subducts, sediments are scraped off and accumulate, forming a distinctive geological structure crucial to understanding mountain building and continental growth.

    Information Booster:

    • Ocean-Continent Convergence Boundary 
    • Formation Process: Denser oceanic plate subducts beneath lighter continental plate
    • Sediments on oceanic floor and trench are scraped off (like a bulldozer)
    • Material accumulates and compresses into wedge shape
    • Wedge-shaped sedimentary mass
    • Composed of marine sediments, oceanic crust fragments, and scraped material
    • Intensely folded and faulted (thrust faults dominate)
    • Grows landward over time (oceanward dipping)
    • Width: tens to hundreds of kilometers

    Additional knowledge:

    • Transform Fault Boundary
    • Plates slide horizontally past each other
    • No subduction or compression
    • Strike-slip faulting dominates
    • Continent-Continent Convergence 
    • Both plates have similar low density (no subduction)
    • Results in mountain building (orogeny)
    • Fold mountains with intense deformation
    • Crustal thickening rather than scraping

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