The location of the 1994 gravity study (heavy-solid line) is superimposed on a topographic map (U.S. Geological Survey, Wetumpka Quadrangle, scale 1:24,000). Note that the transect (solid orange line) begins just to the south of the western side of the horseshoe-shaped crystalline rim (dotted blue line) but crosses the rim on the eastern side. Lack of access in one area necessitated a break in the transect. (modified from guidebook)

Shown here is the simple Bouguer gravity anomaly (regional removed) along the east-west transect described above. In general, the gravity values are lower in the central portion of the Wetumpka structure and are higher along the rim (prepared by J. Plescia (Wolf et al., 1997)).