Environmental Engineering Reference
In-Depth Information
FIGURE 10.20
Stereo-pair of aerial photos of area near Round Rock, Texas, showing sinks and depressions from partial
collapse of shallow limestone. (From Hunt, R.E.,
Bull. Assoc. Eng. Geol.,
10, 1973. With permission.)
FIGURE 10.21
Recent sink, not shown in aerial photos dated 1969
(
Figure 10.19).
Photo taken in 1972. (From Hunt, R.E.,
Bull.
Assoc. Eng. Geol.,
10, 1973. With permission.)
Preliminary Evaluation
From a preliminary evaluation of the data, judgments are formulated regarding the
potential for or the existence of cavity development from natural or human causes, and
