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  2. Forearc - Wikipedia

    en.wikipedia.org/wiki/Forearc

    The constant circulation of material in the forearc region (accretionary prism, forearc basin and trench) generates a mixture of igneous, metamorphic and sedimentary sequences. In general, there is an increase in metamorphic grade from trench to arc where highest grade (blueschist to eclogite) is structurally uplifted (in the prisms) compared ...

  3. North Luzon Trough - Wikipedia

    en.wikipedia.org/wiki/North_Luzon_Trough

    The trough itself is a forearc basin, which is a depression that develops in front of an island arc system. [2] The subducting plate releases fluids and sediments, which accumulate in the forearc basin. These sediments can be uplifted and incorporated into the island arc, contributing to its growth.

  4. Accretionary wedge - Wikipedia

    en.wikipedia.org/wiki/Accretionary_wedge

    An older assumption that backstops of accretionary wedges dip back toward the arc, and that accreted material is emplaced below such backstops, is contradicted by observations from many active forearcs that indicate (1) backthrusting is common, (2) forearc basins are nearly ubiquitous associates of accretionary wedges, and (3) forearc basement ...

  5. Weber Deep - Wikipedia

    en.wikipedia.org/wiki/Weber_Deep

    Weber Deep differs from other deep sea points in that Weber Deep is not a deep sea trench, but is a forearc basin, a deep abyssal plain. The slab detachment is at the east end of the deep. Weber Deep is the 16th deepest point in the Earth's oceans and seas. [1]

  6. Izu–Bonin–Mariana arc - Wikipedia

    en.wikipedia.org/wiki/Izu–Bonin–Mariana_Arc

    Forearc, active arc, and back arc are expressed differently on either side of these boundaries (see figure below). The forearc is that part of the arc system between the trench and the magmatic front of the arc and includes uplifted sectors of the forearc situated near the magmatic front, sometimes called the ‘frontal arc’.

  7. Cook Inlet Basin - Wikipedia

    en.wikipedia.org/wiki/Cook_Inlet_Basin

    The Cook Inlet Basin is a northeast-trending collisional forearc basin that stretches from the Gulf of Alaska into South central Alaska, just east of the Matanuska Valley. It is located in the arc-trench gap between the Alaska-Aleutian Range batholith and contains roughly 80,000 cubic miles of sedimentary rocks. [1]

  8. Great Valley Sequence - Wikipedia

    en.wikipedia.org/wiki/Great_Valley_Sequence

    The eastern boundary of the forearc basin was a volcanic arc, a chain of ancient volcanoes located where the Sierra Nevada is today. Batholiths and metamorphosed volcanic rocks in the Sierra Nevada are the geologic record of this volcanic arc.

  9. Category:Forearc basins - Wikipedia

    en.wikipedia.org/wiki/Category:Forearc_basins

    This page was last edited on 2 December 2018, at 04:45 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.