fossil sites (with link directory) List of sinkholes of the United States References Farlow, James O. and Anne Argast, Preservation of Fossil Bone from the Pipe Creek Sinkhole (Late Neogene, Grant County, Indiana U.S.A.), Journal of the Paleontological Society of Korea, 22(1):51-75, 2006. Farlow, James O. et al., New Vertebrate Fossils from the Pipe Creek Sinkhole (Late Hemphillian, Grant County, Indiana) Paper No. 7-1, delivered at Geological Society of America, North-Central Section - 38th Annual Meeting (April 1–2, 2004), St. Louis, Missouri. Farlow, James O. et al., The Pipe Creek Sinkhole Biota, a Diverse Late Tertiary Continental Fossil Assemblage from Grant County, Indiana. American Midland Naturalist, 145:367-378. Kash, Steve, Amazing Fossils: Grant County Discovery Reveals Life from 3-6 million years ago, Outdoor Indiana, March/April 1999. Kash, Steve, Dr. Jack Sunderman Looks at Ancient River, Outdoor Indiana, November/December 2001. Martin, Robert A., H. Thomas Goodwin and James O. Farlow, Late Neogene (Late Hemphillian) Rodents from the Pipe Creek Sinkhole, Grant County, Indiana. Journal of Vertebrate Paleontology 22(1):137-151, March 2002. Sheets, Hope A., and James O. Farlow, Size-Frequency Distribution of Leopard Frogs (rana pipiens complex) from the Late Tertiary Pipe Creek Sinkhole, Grant County, Indiana, Paper no. 16-11 presented at the 37th Annual Meeting of the North-Central Section, Geological Society of America, 24–25 March 2003, Kansas City, Missouri. Simo, J.A., and Patrick J. Lehmann, Diagenetic History of Pipe Creek Jr. Reef, Silurian, North Central Indiana, U.S.A., Journal of Sedimentary Research, 70(4):937, July 2000. Sunderman, Jack A., Surprises in a Sinkhole, ACRES Quarterly, 42(3), Autumn 2003, published by ACRES Land Trust, Fort Wayne, Indiana. External links The Pipe Creek Sinkhole Hillsdale College: Pipe Creek Sinkhole Project Hillsdale College: Animals of the Pipe Creek Sinkhole The Paleobiology Database: Taxonomic list for Pipe Creek Jr. Reef, Pipe Creek Jr. quarry, Grant County, Indiana: Silurian, Indiana Large-scale topographic map from TopoQuest Bing Maps: The Pipe Creek Sinkhole Farlow, James O. et al. (eds.), Geology of the Late Neogene Pipe Creek Sinkhole (Grant County, Indiana), Indiana Geological Survey Special Report 69, January 2010. Retrieved 21 October 2014. June 21, 2011, Scientist sift through Pipe Creek Jr. sink hole one more time. Sinkholes of the United States Landforms of Grant County, Indiana Quaternary Indiana Pliocene United States Pliocene paleontological sites of North America Geologic formations of Indiana Paleontology in Indiana 1996 in paleontology