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  2. Island arc - Wikipedia

    en.wikipedia.org/wiki/Island_arc

    Island arcs are long chains of active volcanoes with intense seismic activity found along convergent tectonic plate boundaries. Most island arcs originate on oceanic crust and have resulted from the descent of the lithosphere into the mantle along the subduction zone.

  3. Geology of the Alps - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Alps

    The slow folding and pleating of the sediments as they rose up from the depths is believed to have initially formed a series of long east–west volcanic island arcs. Volcanic rocks produced in these island arcs are found among the ophiolites of the Penninic nappes.

  4. Volcanic arc - Wikipedia

    en.wikipedia.org/wiki/Volcanic_arc

    A volcanic arc (also known as a magmatic arc [1]: 6.2 ) is a belt of volcanoes formed above a subducting oceanic tectonic plate, [2] with the belt arranged in an arc shape as seen from above. Volcanic arcs typically parallel an oceanic trench , with the arc located further from the subducting plate than the trench.

  5. Insular Islands - Wikipedia

    en.wikipedia.org/wiki/Insular_Islands

    This violent collision halted subduction which fed volcanic activity in the Omineca Arc and closed the Bridge River Ocean. The subduction zone moved westward to the Farallon Trench, causing new volcanism which formed the Coast Range Arc. Rocks of the Insular Islands now comprise wide sections of the westernmost coast of the North American plate.

  6. Oceanic trench - Wikipedia

    en.wikipedia.org/wiki/Oceanic_trench

    They are found on the oceanward side of island arcs and Andean-type orogens. [3] Globally, there are over 50 major ocean trenches covering an area of 1.9 million km 2 or about 0.5% of the oceans. [ 4 ]

  7. Geology of Massachusetts - Wikipedia

    en.wikipedia.org/wiki/Geology_of_Massachusetts

    A series of island arc and continent-continent collisions built up the Appalachian Mountains throughout the Paleozoic forging many of the rocks in Massachusetts. The first collision between 485 and 440 million years ago began with the arrival of the Shelburne Falls island arc and resulting in the Taconic orogeny mountain building event ...

  8. Geology of the Dominican Republic - Wikipedia

    en.wikipedia.org/wiki/Geology_of_the_Dominican...

    The island arc rocks became exposed above the water line and began to erode as an east-west strike-slip fault emerged. From the Miocene to recent times, oblique strike-slip faults formed along the sutures between old island arcs as the island compressed against North America and oceanic plateau terranes. Nine large fault bounded mountain ranges ...

  9. Accretion (geology) - Wikipedia

    en.wikipedia.org/wiki/Accretion_(geology)

    Oceanic-continental convergence and creation of accretionary wedge Stages of accretion through time with accretionary wedge and volcanic island arc. In geology, accretion is a process by which material is added to a tectonic plate at a subduction zone, frequently on the edge of existing continental landmasses.