In summer 2004, a seismic survey was acquired within western Unaweep Canyon. Seismic reflection data were collected in CMP mode along two lines: a NW-SE transverse profile (540 m long) across the canyon, and a longitudinal profile (150 m long) that crosses the transverse line.The transverse refraction profile was supplemented by five shots at one end of the profile, producing reversed refraction profiles. Travel times from the refraction profiles indicate a velocity jump to approximately 1600 m/s at a depth of approximately 10 m.
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