1. 21st Conference on the Geology of Long Island and Metropolitan New York

2. Site location at Cold Spring Harbor Labs

3. Digital elevation map with site location

4. Cobble layer overlooking Cold Spring Harbor

5. Cobbles and small boulders

6. Cobble layer with till above

8. Soil horizon above stratified drift

9. Stratified drift with alternating coarse layers

10. Thick sandy outwash below coarse layer

11. Huge pile of cobbles & small boulders from coarse layer

12. Cobbles and small boulders separated from coarse layer

13. Iridescent oxide coating on small boulder

14. Quartz ventifacts

15. Cross-section of bluffs in Port Washington sand mines, c. 1974

16. Approx, extent of Cretaceous cuesta in western L.I. Sound, Lewis & Stone, 1991

17. Location of channel deposits in western L.I. Sound, Stone, et.al.2005

21. Acknowledgments The author wishes to thank the management of the Cold Spring Harbor Laboratory for providing access to the site during the excavation process. References Fuller, M.L., 1914. The Geology of Long Island, New York. U.S. Geological Survey Professional Paper 82, 231p. Isbister, J., 1966. Geology and Hydrology of Northeastern Nassau County, Long Island, New York: U.S. Geological Survey Water Supply Paper 1825, 89p. Mills, H.C., 2013, An extraordinary deposit of very coarse stratified drift, Cold Spring Harbor, NY, 20th Annual Long Island Geologist Conference, Stony Brook University. Mills, H.C., and Wells, P.D., 1974, Ice-shove deformation and glacial stratigraphy of Port Washington, Long Island, New York: Geol. Soc. America Bull., v. 85, pp. 357-364. Sirkin, L.A., and Stuckenrath, R., 1980, The Portwashingtonian warm interval in the northern Atlantic coastal plain: Geol. Soc. America Bull., Part 1, v. 91, pp. 332-336. Stone, J.R., et. al., 2005, Quaternary Geologic Map of Connecticut and Long Island Sound Basin: Scientific Investigations Map 2784, U.S. Geological Survey. Acknowledgments The author wishes to thank the management of the Cold Spring Harbor Laboratory for providing access to the site during the excavation process. References Fuller, M.L., 1914. The Geology of Long Island, New York. U.S. Geological Survey Professional Paper 82, 231p. Isbister, J., 1966. Geology and Hydrology of Northeastern Nassau County, Long Island, New York: U.S. Geological Survey Water Supply Paper 1825, 89p. Mills, H.C., 2013, An extraordinary deposit of very coarse stratified drift, Cold Spring Harbor, NY, 20th Annual Long Island Geologist Conference, Stony Brook University. Mills, H.C., and Wells, P.D., 1974, Ice-shove deformation and glacial stratigraphy of Port Washington, Long Island, New York: Geol. Soc. America Bull., v. 85, pp. 357-364. Sirkin, L.A., and Stuckenrath, R., 1980, The Portwashingtonian warm interval in the northern Atlantic coastal plain: Geol. Soc. America Bull., Part 1, v. 91, pp. 332-336. Stone, J.R., et. al., 2005, Quaternary Geologic Map of Connecticut and Long Island Sound Basin: Scientific Investigations Map 2784, U.S. Geological Survey.