The shallow seismic reflection tech

The shallow seismic reflection technique is relatively straightforward from a conceptual perspective.
Ideally, a high frequency, short-duration pulse of acoustic energy is generated at the earth's surface, and
measure the arrival times and magnitudes of “echos” that are reflected from subsurface acoustic horizons
(i.e., water table, bedrock, lithologic and facies contacts, etc.) and returned to the earth’s surface. Ideally, the
travel times and magnitudes of these recorded “echoes” can be used to create a 2-D or 3-D velocity/depth
model of the subsurface. If borehole lithologic control is available, a 2-D or 3-D geologic image of the
subsurface can be generated