P.A. McCrory 1996 <div id="15577020" class="article-section-wrapper js-article-section js-content-section " data-section-parent-id="0"><p>Differential motion across the central Cascadia subduction boundary in Washington results in a complex pattern of folds and faults within the shelf and onshore parts of the accretionary margin. Faults and folds above a coastal, north-northwest–trending thrust system provide evidence of ongoing subduction-related contraction. South of this coastal thrust system many fold axes and thrust faults trend east-northeast, in the direction of convergence. These structures are not consistent with a simple subduction system undergoing northeastward convergence. This deformation, adjacent to the boundary between the subduction complex and the Siletz terrane, may be driven by relative convergence between the northward-translating Siletz terrane and the subduction complex. The regional pattern of modern uplift rates is consistent with ongoing north-south contraction across this boundary and the north-south compressional stress field in the area.</p></div> application/pdf 10.1130/0091-7613(1996)024<0929:TMEDCD>2.3.CO;2 en Geological Society of America Tectonic model explaining divergent contraction directions along the Cascadia subduction margin, Washington article