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| | Abstract | | We conducted a shallow seismic reflection survey along a coastal line at the Kujukuri coastal plain (Magame Katakai area), Chiba Prefecture, east Japan, to reveal the shape of Alluvial base. A preliminary CMP stacked time section was created by simple data processing. In the seismic section, a strong and continuous reflector exists between 20ms and 30ms in two way time and it is considered as the Alluvial base. Other reflectors are detected down to 250ms. The Alluvial base does not show a buried valley shape and it deepens about 8m northward very gently inside the range of seismic line. |
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