reversed arc

reversed arc

[ri′vərst ′ärk]
(geology)
A curved belt of islands which is concave toward the open ocean, the opposite of most island arcs.
References in periodicals archive ?
A long-striding filly who was always considered at her best on good ground, she landed the Sheema Classic in thrilling style when she reversed Arc form with Flintshire to score by two and a quarter lengths.