Definition of back-arc in English:

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back-arc

Entry from British & World English dictionary

adjective

Geology
Relating to or denoting the area behind an island arc: back-arc basin
More example sentences
  • The Kinik rocks have characteristics of ophiolites formed in oceanic or back-arc basins rather than island-arc settings based on a number of observations.
  • Deformation is complex, with normal faulting and strike-slip faulting in the geomorphological back-arc basin.
  • What remains unclear is whether the rocks formed in an open ocean or a marginal back-arc basin associated with a subduction zone.
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