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

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	22:45, 3 May 2019	No thumbnail	2,231 × 3,000 (2.83 MB)	RockDoc485	Illustrates 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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Orientation	Normal
Horizontal resolution	300 dpi
Vertical resolution	300 dpi
Software used	Adobe Photoshop CS5 Windows
File change date and time	17:21, 3 May 2019
Color space	sRGB
Date and time of digitizing	12:24, 3 May 2019
Date metadata was last modified	13:21, 3 May 2019
Unique ID of original document	uuid:e53b687d-9cdb-4128-b4c7-04e82d1fa64e