A seismic reflection study over the Bane antioline in
southwest Virginia (31° 16' 50" N, 80° 41' 30" W) was made in an
attempt to gain information about the thickness of sedimentary
rocks in this part of the Appalachian Valley and Ridge province.
Eleven seismograms were obtained. In addition to frequency
filtering, velocity filtering, and deconvolution, new methods of
interpreting RMS velocity analyses were developed and applied.
Persistent events at about 1.0 and 2.8 seconds were found,
suggesting the presence of large reflection coefficients. On the
basis of ultrasonic velocity measurements made on rock samples
representative of the Cambrian sedimentary sequence and Precambrian
basement rocks believed to underlie the Bane anticline, it was
concluded that an unbroken Cambrian sequence overlying the basement
could not produce reflection coefficients of the magnitude
required, but that a thrust fault could. No definite conclusions
about the structure beneath the Bane anticline could be reached, although the reflection at 2.8 seconds and the suggestion of a
large reflection coefficient favor the interpretation of a
thick, repeated sedimentary section.
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