Seismic reflection is useful for graphically profiling subsurface stratigraphy. It is used to map clay and sand lenses and bedrock troughs. Applications of this technique include determination of depth to bedrock, aquifer location studies, and mapping of overburden stratigraphy.
Seismic refraction is a commonly used geophysical technique to determine depth-to-bedrock, competence of bedrock, depth to the water table, or depth to other seismic velocity boundaries.
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