FLORIDA GEOLOGICAL SURVEY Huddlestun, P.F. and Hunter, M.E., 1982, Stratigraphic revision of the Torreya Formation of Florida, in Scott, T.M., and Upchurch, S.B., (eds.) Miocene of the southeastern United States, Proceedings of the symposium: Florida Geological Survey Special Publication, 25, 210 p. Hunter, M.E. and Huddlestun, P.F., 1982, The biostratigraphy of the Torreya Formation of Florida, in Scott, T.M., and Upchurch, S.B., (eds.) Miocene of the southeastern United States, Proceedings of the symposium: Florida Geological Survey Special Publication, 25, 210 p. Knapp, M.S., 1978, Environmental geology series Valdosta Sheet: Florida Geological Survey Map Series 88, scale 1:250,000. Knapp, M.S., Copeland, R.E., Scott, T.M., Ceryak, R., Price, D. and Burnson, T., 1981, Karst hydrogeology and Miocene geology of the upper Suwannee River Basin, Hamilton County, Florida, October 23-24, 1981: Southeastern Geological Society Guidebook, 23, 36 p. Macesich, M. and Martinez, N., 1992, Mines and quarries greater than 10 acres in size in the Suwannee River Water Management District: Florida Geological Survey Open File Map Series 1, scale 1:250, 000. MacNeil, F.S., 1950, Pleistocene shorelines in Florida and Georgia: United States Geological Survey Professional Paper 221-F, p. 95-107. Matson, G.C. and Sanford, S., 1913, Geology and groundwater of Florida: United States Geological Survey Water Supply Paper 319, 445 p. Miller, J.A., 1986, Hydrogeologic framework of the Florida aquifer system in Florida and in parts of Georgia, Alabama, and South Carolina: Regional Aquifer-System Analysis: United States Geological Survey Professional Paper 1403-B, Washington, 91 p., 33 plates. Musgrove, R.H., 1965, Water resources of the Econfina Creek Basin area in northwestern Florida: Florida Geological Survey Report of Investigations 41, 51 p.: http://www.uflib.ufl.edu/ufdc/?s=fgs&b=UF00001228&v=00001 (August 2008). National Geographic, 2008, National Geographic: Black widow spider profile: http://animals.nationalgeographic.com/animals/bugs/black-widow-spider.html (August 2008). Olson, N.K., 1966, Upper Miocene land vertebrate locality, Jefferson County, Florida, Stop 1: in Brooks, H.K., (ed.), Geology of the Miocene and Pliocene series in the north Florida south Georgia area: Tallahassee, Southeastern Geological Society Guidebook 12, p. 19-24. Pirkle, E.C., Jr., Yoho, W.H. and Hendry, C.W., Jr., 1970, Ancient sea level stands in Florida: Florida Geological Survey Bulletin 52, 61 p.