William D. Frazer

Flat‐Slab Subduction and Overriding Plate Architecture Beneath the Northwestern Andes Revealed by Receiver Functions

The existence of flat‐slab subduction beneath the northern Andes of Colombia, north of ∼5.5°N, has been inferred from the absence of active volcanism and from a Wadati–Benioff zone located >400 km from the trench. Here we use new broadband seismic data from northwestern Colombia to constrain slab geometry, the structur...