Figure 9. Side-looking airborne radar (SLAR) image of the southern part of the Williamsport 1°x2° quadrangle and the northern part of the Harrisburg 1°x2° quadrangle, central Pennsylvania, showing broad folds of the anthracite district east of the Susquehanna River and narrower folds west of the river. Heavy straight lines indicate boundaries of the Susquehanna lateral ramp. Width of area shown in figure is 93 mi. See figure 10 for identification of features.