Usòrò:Subsurface erosion of soil into karst conduit by water level fluctuation.jpg

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Mmẹkụwátá

Illustration of "erosion from below" shows how the fluctuation of the water table above and below the soil-rock contact develops cover collapse sinkholes. This is Figure 18 on pages 22 and 23 of Newton, John G., "Development of sinkholes resulting from man's activities in the eastern United States", US Geological Survey, 1987, CIRCULAR 968. Available at https://pubs.usgs.gov/circ/1987/0968/report.pdf

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Public domain
This image is in the public domain in the United States because it only contains materials that originally came from the United States Geological Survey, an agency of the United States Department of the Interior. For more information, see the official USGS copyright policy.

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Èhì/OgèMbọ-akaÓgólógó na asaáÒjìèmeNkwute
dị ùgbu â22:45, 3 Mee 2019NvóÁká màkà otù ȯ dị nà 22:45, 3 Mee 20192,231 × 3,000 (2.83 MB)RockDoc485Illustrates how the fluctuation of the water table above and below the soil/rock surface develops sinkholes. Figure 18 of Newton, John G. "Development of sinkholes resulting from man's activities in the eastern United States". US Geological Survey, 1987, CIRCULAR 968 on pages 22 and 23. Available at https://pubs.usgs.gov/circ/1987/0968/report.pdf

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