Forearc is part of WikiProject Geology, an attempt at creating a standardized, informative, comprehensive and easy-to-use geology resource. If you would like to participate, you can choose to edit this article, or visit the project page for more information.
Defining the forearc as "a depression in the sea floor" is misleading. The USGS definition cited states "The forearc is the region between the subduction zone and the volcanic chain (volcanic arc)." As such, the entire forearc is not always offshore or even within a depression. Not every forearc cross-section has a forearc basin, which is why we have the term "upper slope". In erosional margins, there may be no forearc basin, as the deposition is occuring on the steeper lower slope (contemplate Costa Rica). In accretionary margins, this upper slope may be indistinguishable from the continental shelf. In the Sumatran forearc, there is a major plateau trenchward of the forearc basins and a significant region of continental crust between the forearc basins and the volcanic arc. In parts of Central and South America, there is also a significant distance from the coastline to the arc, which is technically part of the forearc, but is both above water, and original continental crust. Overall, this article is written from a very narrow viewpoint, based on work published about California (which does not have an active arc or forearc), and ignoring extensive published work on modern in situ forearcs (for a hint of how much we know, see Subduction and the List of tectonic plate interactions). In addition, it contains too many technical terms without any simpler explanation, making it unreadable to the typical layperson. I may eventually attempt a rewrite, but anyone else who wishes to deal with any of these issues would be appreciated.Elriana (talk) 20:56, 18 July 2013 (UTC)
So someone has rewritten the article so it is actually about the whole forearc and more globally applicable. But the explanations and writing itself could still use some improvement. I'll work on it when I can, but won't be offended if other people have better ideas. Elriana (talk) 22:19, 1 May 2014 (UTC)