Sinkhole Distribution and Density of Columbia Quadrangle, St. Clair and Monroe Counties, Illinois
Daniel O. Nelson
One 36" × 30" map sheet and one 6-page report; map sheet contains map, legend, and 2 aerial photographs; report includes descriptive text with 4 figures and 1 photo
Purchase this map online through Shop ISGS*, or contact the Sales and Information Office for more information.
*excludes EDMAP series and student maps