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1. Geologic atlas of Fillmore County, Minnesota, C-8, Part B, Plate 8, Sinkholes and Sinkhole Probability

1996. Falteisek, Jan, Witthuhn, Kathleen, M., and Alexander, E. Calvin, Jr. Map showing location of sinkholes and likelihood of future sinkhole development, scale 1:100,000, Fillmore County.

2. Geologic atlas of Fillmore County, Minnesota, C-8, Part B, Plate 9, Springsheds

1996. Falteisek, Jan, Alexander, E. Calvin, Jr., Green Jeffrey A., Alexander, Scott C., and Spong, Ronald C. Map showing the locations of springs and seeps and the interaction of surface drainage, karst (carbonate rock with caves, springs) ground water and...

3. Geologic atlas of Goodhue County, Minnesota, C-12, Part B, Plate 10, Sinkholes, Sinkhole Probability, and Springs and Seeps

2003. Falteisek, Jan, Alexander, E. Calvin, Jr., Berner, David J., Gao, Yongli, and Green, Jeffrey A. Maps showing distribution of karst (carbonate rock with caves, springs) units and features and karst hydrology in carbonate rocks susceptible to be...

4. Geologic atlas of Olmsted County, Minnesota, C-3, Plate 7, Sinkhole Probability

1988. Balaban, N.H., Alexander, E. Calvin, Jr., and Maki, Geri L. Map showing location of sinkholes and likelihood of future sinkhole development, scale 1:100,000, Olmsted County.

5. Geologic atlas of Pine County, Minnesota, C-13, Part A, Plate 6, Sinkhole distribution, Depth to Bedrock, and Bedrock Topography

2001. Boerboom, Terrence J., Shade, Beverley L., Alexander, E. Calvin, Jr., and Alexander, Scott C. Map showing the thickness (depth to bedrock) of unconsolidated sediments (Quaternary glacial and stream materials) over the bedrock surface and ele...

6. Geologic atlas of Wabasha County, Minnesota, C-14, Part A, Plate 5, Karst Features

2001. Runkel, Anthony C., Tipping, Robert G., Green, Jeffrey A., and Alexander, E. Calvin, Jr. Maps showing distribution of karst (carbonate rock with caves, springs) rock units and features and karst hydrology, including springs (water emerg...

7. Geologic atlas of Winona County, Minnesota, C-2, Plate 5, Sinkhole Probability

1984. Balaban, N.H., Olsen, Bruce M., Dalgleish, Janet B., and Alexander, E. Calvin, Jr. Map showing location of sinkholes and likelihood of future sinkhole development, scale 1:100,000, Winona County.