Figure 7. Click in figure for larger image. Sidescan-sonar image of the town of St. Thomas, which was
submerged shortly after Lake Mead started to fill. The streets trend north
south and east west, and some of the high-backscatter targets are foundations.
The former channel of Muddy Creek has not been filled with sediment and
still shows in the northeast corner of the image. The figure location
is shown in Figure 3.