| Citation: | James B. Harris. Hammer-Impact SH-Wave Seismic Reflection Methods in Neotectonic Investigations: General Observations and Case Histories from the Mississippi Embayment, U.S.A.. Journal of Earth Science, 2009, 20(3): 513-525. doi: 10.1007/s12583-009-0043-y
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Shallow shear-wave seismic reflection imaging, using a sledgehammer and mass energy source and standard processing, has become increasingly common in mapping near-surface geologic features, especially in water-saturated, unconsolidated sediments. Tests of the method in the Mississippi Embayment region of the central United States show interpretable reflection arrivals in the depth range of < 10 m to > 100 m with the potential for increased resolution when compared with compressional-wave data. Shear-wave reflection profiles were used to help interpret the significance of neotectonic surface deformation at five sites in the Mississippi Embayment. The interpreted profiles show a range of shallow structural styles that include reverse faulting, fault propagation folding, and reactivated normal faulting, and provide crucial subsurface evidence in support of paleoseismologic trenching and shallow drilling.
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