Volcanic arcs frequently exhibit spatial gaps in their distribution that are directly tied to structural variations and geometric anomalies in the underlying subducting plate.
The claim is specific, empirical, and testable. The retrieved literature includes multiple peer-reviewed studies (such as papers 0 and 3) demonstrating that volcanic gaps (like those in the Cascades and Alaska) correlate directly with subducting plate geometry and structural segmentation. No papers refute the core premise.