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25 maj 2004 · The Illinois sinkhole plain is located primarily in Monroe County in southwestern Illinois, on the western margin of the Illinois Basin ( Fig. 1). Approximately 10,000 sinkholes, numerous large springs, and the longest caves in the state are found here.
The Ozark Natural Division consists of the part of the Ozark uplift that extends into southwestern Illinois. Topography is of a maturely dissected plateau with bluffs along the Mississippi River, and a sinkhole plain in the northern section. Natural vegetation of the area is mostly forested with many hill prairies.
Illinois State Geological Survey, Illinois Map Series 8, 1:500,000 Scale. This dataset contains digitized points for cover-collapse, karst sinkhole locations using bare-earth lidar elevation data for the State of Illinois acquired during the leaf-off periods of 2009, 2011-2012, 2014-2015, and 2017-18. Each sinkhole point is assigned a unique ...
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Monroe County in the sinkhole plain of southwestern Illinois possesses 10,065 cover-collapse sinkholes, accounting for 46 percent of the total number, the largest and densest distribution of cover-collapse sinkholes within the state.
U.S. Department of the Interior U.S. Geological Survey Map Viewer
1 paź 2018 · High-resolution lidar elevation data for the Illinois sinkhole plain have exposed previously unnoticed geomorphologic details. Analysis of these data has revealed a pattern of long-term evolution of cover-collapse sinkholes within the groundwater basins.
