BIBLIOGRAPHY Berkson, J. M., Lineback, J. A., and Gross, D. L. 1975. A side-scan sonar investigation of small-scale features on the floor of southern Lake Michigan. Illinois State Geological Survey, Environmental Geology Note No. 74. Buschbach, T. C. and Heim, G. E. 1972. Preliminary geologic investigations of rock tunnel sites for flood and pollution control in the greater Chicago area. Illinois State Geological Survey, Champaign, IL, Environmental Geology Notes, no. 52. Cahill, R. A. 1981, Geochemisty of recent Lake Michigan sediments. Illinois State Geological Survey, Champaign, IL, Circular 517. Folk, R. L. 1974. Petrology of sedimentary rocks. Austin, TX, Hemphill Publishing Co. Elassal, A. A. and Caruso, V. M. 1983. Digital elevation models. U. S. Geological Survey Circular 895-B. Foster, D. S., and Colman, S. M. 1992. Thickness and distribution of post glacial deposits beneath Lake Michigan. U. S. Geological Survey Miscellaneous Investigations Map, MI-2202. Foster, D. S., Folger, D. W., Brown, C. L., Seekins, B. L. 1992. Maps and cross-sections showing bedrock surface elevations and Quaternary sediment thickness beneath southwestern Lake Michigan and in the adjacent Illinois and Indiana nearshore region. U. S. Geological Survey Miscellaneous Investigation Map xxxx. Graf, J. B. 1976. Comparison of measured and predicted nearshore sediment grain-size distribution patterns, southwestern Lake Michigan, U. S. A. Marine Geology, 22: 253-270. Gray, H. H. 1982. Map of Indiana showing topographjy of the bedrock surface. Indiana Geological Survey, Bloomington, IN, Miscellaneous Map 36. Horberg, C. L. 1950. Bedrock topography of Illinois.Illinois Geological Survey, Champaign, IL, Bulletin 73. Hough, J. L. 1935. The bottom deposits of southern Lake Michigan. J. Sedimentary Petrology, 5: 57-80. Hough, J. L., 1958. Geology of the Great Lakes. Urbana, IL, University of Illinois Press. Lineback, J. A., Gross, D. L., Meyer, R. P., and Unger, W. L. 1971. High resolution seismic profiles and gravity cores of sediments in southern Lake Michigan. Illinois State Geological Survey, Champaign, IL, Environmental Geology Notes no. 47. Lineback, J. A., Gross, D. L., and Meyer, R. P. 1974. Glacial tills under Lake Michigan. Illinois State Geological Survey, Champaign, IL, Environmental Geology Notes, no. 69. Meisburger, E. P., Williams, S. J., and Prins, D. S. 1979. Sand resources of southeastern Lake Michigan.U. S. Army Corps of Engineers Miscellaneous Report No. 79-3. National Geophysical Data Center 1987. NOAA National Geophysical Data Center Data Announcement 87-MGG-12. Norby, R. D.. 1981. Evaluation of Lake Michigan nearshore sediments for nourishment of Illinois beaches. Illinois State Geological Survey, Champaign, IL, Environmental Geology Notes 97. Pettitjohn, F. J. 1931. Petrography of the beach sands of southern Lake Michigan. J. Geology, 39: 432-455. Polloni, C. F., and Brown C. L. in press. The southern Lake Michigan Coastal Erosion Study CDROM. U. S. Geological Survey Open File Repoprt 92-xxxx. Schlee, J. S., Folger, D. W., Risch, J. S., Seekins, B. A., Foster, D. S., Polloni, C. F., Brown, C. L., Chrzastowski, and Thompson, Todd, in press. Physiography and sediment distribution of Indiana Shoals, southern Lake Michigan. U. S. Geological Survey Miscellaneous Investigation Series Map MI-xxxx. Schneider, A. F., and Keller, S. J., 1970. Geologic map of the 1oX2o Chicago Quadrangle, Indiana, Illinois, and Michigan, showing bedrock and unconsolidated deposits. Indiana Geological Survey, Bloomington, IN, Regional Map No. 4. Shedlock, R. J., Chen, D. A., Imbrigiotta, T. E., Thompson, R. A., and Lindgren, H. A., in press, Hydrogeology and hydrochemistry of dunes and wetlands along the south shore of Lake Michigan, Indiana: U. S. Geological Survey Water Supply Paper. Suter, Max, Bergstrom, R. E., Smith, H. F., Emrich, W. C., Walton, W. C., Larson, T. E. 1959. Preliminary report on ground-water resources of the Chicago region, Illinois. Illinois Water Survey and Illinois Geological Survey Coop., Champaign, IL, Ground-Water Rept. 1. Welkie, C. J., and Meyer, R. P. 1982. Exploration and assessment of offshore sand and gravel, western Lake Michigan. Marine Minerals, 3 (3-4):315-378. Wickham, J. T., Gross, D. L., Lineback, J. A., and Thomas, A. L., 1978. Late Quaternary sediments of Lake Michigan. Illinois State Geological Survey, Champaign, IL, Environmental Geology Note No. 84. Willman, H. B., 1971. Summary of the geology of the Chicago area. Illinois State Geological Survey Circular 460. Wold, R. J., Paull, R. A., Wolosin, C. A., and Friedel, R. J. 1981. Geology of central Lake Michigan. Amer. Assoc. Petroleum Geologists Bulletin, 65, no. 9:1621-1632.