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foredeep
foredeep n.
Brit. 
/ˈfɔːdiːp/
, /ˈfɔːdiːp/U.S. /ˈfɔrˌdip/
Geology a trench or elongated depression along the edge of an orogenic belt, often beneath the sea./ˈfɔrˌdip/ΘΚΠ
the world > the earth > land > landscape > low land > hollow or depression > [noun] > large hollow or basin
hollow1553
howe1584
lake-basin1833
bolson1838
basinc1854
terr-oceanic basin1859
bowl1860
torsion-basin1899
cuvette1907
foredeep1909
the world > the earth > water > sea or ocean > region of sea or ocean > [noun] > sea bed > trench or cavity in
alveus1670
basin1881
trench1903
foredeep1909
oceanic trench1945
ocean trench1956
1909 H. B. C. Sollas & W. J. Sollas tr. E. Suess Face of Earth IV. v. ix. 295 These depressions mark the subsidence of the foreland beneath the recent folds. They have received the name of ‘fore-troughs’. But..their two sides are of different structure, and it therefore seems advisable to call them ‘fore-deeps’.
1968 R. W. Fairbridge Encycl. Geomorphol. 35 ‘Pacific’ tectonics are those associated with contemporary orthogeosynclines, island arcs, oceanic trenches and active foredeeps.
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