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The AAPG/Datapages Combined Publications Database
AAPG Special Volumes
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Data from seismic refraction experiments across the trenches of Peru, Colombia, and Mexico, and across the U.S. East Coast show distinctive differences between active and passive margins, especially in the mantle paths. Active margins show clear mantle arrivals across the trench whose velocities are consistent with the subduction of oceanic lithosphere at relatively shallow angles of 6° to 14° near the trench axis. Data across the U.S. East Coast have discontinuous weak mantle arrivals that can be partly explained by a relatively sharp change in depth between the continental and oceanic Moho.
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