Ocean bottom seismometer (OBS) seismic refraction data in the Gulf of Mexico off the Yucatan Peninsula, acquired by the R/V Longhorn in 1996 (96L676)

The project collected seismic reflection (M/V?GECO Sigma) and refraction data along two lines that cross the Chicxulub KT Impact Crater; Yucatan; Mexico. It represents a joint collaborative effort between the British Institutions Reflection Profiling Syndicate (BIRPS) (UK); the Canadian Geological Survey; Imperial College (UK); the Lunar and Planetary Institute; the Universidad Nacional Aut?noma de M?xico (UNAM); and The University of Texas Institute for Geophysics (UTIG). The OBS wide-angle and refraction data were collected at the same time as the reflection data and are being integrated with the land-based wide-angle data to model the velocity structure of the Chicxulub crater.?The purpose of this joint project was to image in detail the internal crustal structure and morphology of the Chicxulub impact crater and to quantify its dimensions.