Cruise Plan
Sea Beam 2000 data will be acquired at the OBS sites, the Gulf of Tehuantepec, and along the flexurally bending Mid America Trench outer rise in order to supplement existing SIO data (Lonsdale, 1995, and unpublished data) which indicates a unique pattern of faulting. The effects of aging, varying subducting slab angle, possible influences of the nearby Cocos-North American-Caribbean Triple Junction, and the subduction of large aseismic bathymetric feature, the Tehuantepec Fracture Zone, along a non-linear segment of the trench will also be quantified.