The regional dip in the Wind Cave area is 4° SE. In the hill north of the natural entrance, across the highway from the campground, dips up to 38° were observed in what appears to be a minor anticline. This may be due to slumping, but in any case the relation of such unusual structure to the cave should be considered. Some comments are made elsewhere in this report on the jointing in the area. The structural trends observed on air photographs, listed in the section on regional geology, are parallel to the two most prominent directions of cave development, and a third trend at N 85° W (true bearing) is parallel to the most prominent measured boxwork orientation.
Although the cave is very irregularly shaped in detail, the map and especially the rosette presented below show it to be a strongly joint-controlled cave.
After the major effort of the study group, which was directed largely at mapping, a return trip was made to take oriented photographs of the boxwork, in order to study the pattern of the boxwork fractures. A preliminary group of 11 photographs were taken. A comment on one of these is made in the expedition report below. A great deal more work could be done on the orientation of the boxwork.