Lakebed Pockmarks in Burlington Bay, Lake Champlain: I. Hydrodynamics and Implications of Origin

  • Patricia L. Manley
  • T. O. Manley
  • Mary C. Watzin
  • Josh Gutierrez
Conference paper


Using side-scan sonar and sub-bottom profiles, a 40 m diameter, ~4 m deep lakebed pockmark was investigated in Burlington Bay, Lake Champlain, Vermont. Five piston cores (2 inside, 1 on the rim and 2 outside of the pockmark) were collected and analyzed for magnetic susceptibility, physical properties and 210Pb and 132Cs concentrations. A yearlong subsurface mooring, equipped with an Acoustic Doppler Current Profiler (ADCP) and vertical temperature chain, was placed in the deepest section of the pockmark (27.7 m). A second temperature chain was placed along the pockmark floor and over its rim. At the base of the mooring, 35 mm stereo cameras and a Savonius rotor current meter ~ 0.3 m above the lake floor) were installed. Bottom photographs show episodic events of suspended sediment. Temperature data show the presence of anomalously cold temperature water near the rim of the pockmark during stratified periods and anomalously warmer water temperatures during isothermal winter type conditions. Coarser grain size and bulk density occur inside the pockmark with an associated decrease in water content in comparison to sediment outside the pockmark. Radionuclide results show no detectable net accumulation of sediment within the rim of the pockmark, slight accumulation in the deepest part of the pockmark, and only a few tenths of a mm/yr accumulation outside. This pockmark was most likely formed by groundwater seepage and is subsequently modified by continuing groundwater seepage and bottom-flowing currents. Taylor column and frictional boundary layer dynamics are believed to play a role in the circulation within this feature.


Potential Vorticity Acoustic Doppler Current Proftier Dust Devil Piston Core Groundwater Seepage 


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  1. Acosta, J., 1984, Occurrence of acoustic masking in sediments in two areas of the continental shelf of Spain: Ria de Muros (NW) and Gulf of Cadiz (SW), Mar. Geol. 58: 427–434.CrossRefGoogle Scholar
  2. Barnhardt, W. and Kelley, J., 1995, Carbonate accumulation on the inner continental shelf of Maine: a modem consequence of late Quaternary glaciation and sea-level change, J. of Sed. Res.A65:195–207.Google Scholar
  3. Barnhardt, W., Belknap, D. and Kelley, J., 1997, Stratigraphic evolution of the inner continental shelf in re sponse to late Quaternary relative sea-level change, northwestern Gulf of Maine, GSA Bull. 109: 612–630.Google Scholar
  4. Berkson, J. M., 1973, Possible syneresis origin of valleys on the floor of Lake Superior. Nature 254:89–91. Blasco, S. and Keyes, D., 2000, Lakebed disturbance features, Long Point area, eastern Lake Erie, Great Lakes, great science, great cities, iAAGLR 42: A9.Google Scholar
  5. Blasco, S., Harrison, P., Keyes, D., Hannes, R., and Folkes, P., 1998, Distribution, age and origins of lakebed instability features, Georgian Bay, southern Ontario, Abstracts with programs — GSA, 30: 296.Google Scholar
  6. Bouriak, S., Vanneste, M., and Saoutkine, A., 2000, Inferred gas hydrates and clay diapirs near the Storegga Slide on the southern edge of the Voring Plateau, offshore Norway, Mar. GeoL 163: 125–148.CrossRefGoogle Scholar
  7. Chapman, C. H.,1942, Late-glacial and post-glacial history of the Champlain valley, Report of the State Geologist of Vermont.Google Scholar
  8. Chase, J. and Hunt, A., 1972, Sub-bottom profiling in central Lake Champlain- A reconnaissance study, Proc. 15m Conference of Great Lakes Res.:317–329.Google Scholar
  9. Cole, D., Stewart, S. A. and Cartwright, J. A., 2000, Giant irregular pockmark craters in the Palaeogene of the outer Moray Firth basin, UK North Sea, Mar. and Petrol. GeoL 17: 563–577.CrossRefGoogle Scholar
  10. Connally, G.G. and Sirkin, L. A., 1973, Wisconsinan history of the Hudson-Champlain Lobe: The Wisconsinan Stage, GSA Memoir 136: 47–69.Google Scholar
  11. Corliss, B. H., Hunt, A., and Keigwin Jr., L D., 1982, Benthonic foraminiferal faunal and isotopic data for the postglacial evolution of the Champlain Sea, Quat. Res. 17: 325–338.CrossRefGoogle Scholar
  12. Demyttenaere, R., Ibrahim, A., Tromp, J-P., and Zulkifli, B. A., 2000, Brunei deep water exploration; fromGoogle Scholar
  13. sea-floor images to depositional models in a slope turbidite setting, AAPG Bull. 84:1418.Google Scholar
  14. Fader, G.B.J., 1991, Gas-related sedimentary features from the eastern Canadian Continental Shelf, Cont. Shelf Res. 11:1123–1153Google Scholar
  15. Fleischer, P., Orsi, T.H., Richardson, M.D. and Anderson, A. L, 2001, Distribution of free gas in marine sediments: A global overview, Geo-Mar. Letters 21: 103–122CrossRefGoogle Scholar
  16. Flood, R. D., 1981, Pockmarks in the deep sea, EOS, AGU 62: 304.Google Scholar
  17. Flood, R.D. and Johnson, T.C., 1984, Side-scan targets in Lake Superior-evidence for bedforms and sediment transport. Sedimentology 31: 311–333.CrossRefGoogle Scholar
  18. Foland, S., Maher, N., and Yun, J., 1999, Pockmarks along the California continental margin; implications for fluid flow, AAPG Bull. 83: 687–688.Google Scholar
  19. Garcia-Gil, S., Vilas, F. and Garcia-Garcia, A., 2002, Shallow gas features in incised-valley fills (Ria de Vigo, NW Spain):a case study, Cont. Shelf Res. 22:2303–2315.Google Scholar
  20. Grant, A. C. and Morrison, M. L.,1998, Report on survey on pockmarks in southern Laurentian Channel, Open File Report — Geological Survey of Canada, Report 3596, 278 pp.Google Scholar
  21. Gutierrez, J., 2001, The General pockmark in Burlington Bay, Lake Champlain, Unpublished senior thesis, Middlebury College, Middlebury, VT., p. 63.Google Scholar
  22. Harrington, P., 1985, Formation of pockmarks by pore-water escape, Geo-Mar. Letters 5:193–197. Hillaire-Marcel, C., 1974, Le deglaciation au nordouest de Montreal: Donneees radiochronologiques et faits stratigraphiques, Revue Geographique Montreal 28: 407–417.Google Scholar
  23. Hovland, M., and Judd, A. G, 1988, Seabed Pockmarks and Seepages: Impact on Geology, Biology and the Marine Environment•. Graham and Trotman, London, 293 p.Google Scholar
  24. Hunt, A. S., 1972, Bottom sediments of Lake Champlain 1965–1971, GSA Bull. 9: 630–639.Google Scholar
  25. Hunt, A. S., 1977, Sediment thickness, Eastern Lake Champlain, Vermont Resources Center and U.S. Department of Interior.Google Scholar
  26. Hunt, A. S., 1981, Detailed investigation of suspected Holocene fault movement in Central Lake Champlain, Vermont: 1–47.Google Scholar
  27. Hunt, A.S., Henson, E. B., and Bucks D. P., 1972, Sedimentological and limnological studies of Lake Cham-plain, Annual Meeting–New England Intercollegiate Geological Conference, Guidebook, 64: 407–426.Google Scholar
  28. Johnson, T.C., 1980, Lake-glacial and post glacial sedimentation in Lake Superior based on seismic reflectionGoogle Scholar
  29. profiles, Quat. Res. 13:380–391.Google Scholar
  30. Johnson, T. C., Flood, R. D., Busch, W. H., and Halfman, J. D., 1984, Effects of bottom currents and fish on sedimentation in a deep-water, lacustrine environment, GSA BulL 95: 1425–1436.CrossRefGoogle Scholar
  31. Josenhans, H. J., King, LH., and Fader, G.B.J., 1978, A side-scan sonar mosaic of pockmarks on the Scotian Shelf: Can. J. of Earth Sci. 15: 831–840.Google Scholar
  32. Judd, A.G. and Hovland, M., 1992, The evidence of shallow gas in marine sediments, Cont. ShelfRes12: 1081–1095.Google Scholar
  33. Kelley, J. T., Dickson, S. M., Beknap, D. F., Barnhardt, W. A., and Henderson, M., 1994, Giant sea-bed pockmarks: evidence for gas escape from Belfast Bay, Maine: Geology 22: 59–62.Google Scholar
  34. King, L. H., and MacLean, B., 1970, Pockmarks on the Scotian Shelf: GSA BulL 81: 3141–3148.CrossRefGoogle Scholar
  35. Manley, P.L., Manley, T. O., Saylor, J. H., and Hunkins, K. L., 1999, Sediment deposition and resuspension in Lake Champlain, In: Manley, T.O. and P.L. Manley (eds.), Lake Champlain in Transition: From Research Toward Restoration, Water Science and Application, AGU 1: 157–181.Google Scholar
  36. Manley, T. O., Hunkins, K. L, Saylor, J. H., and P. Manley, 1999, Aspects of summertime and wintertime hydrodynamics of Lake Champlain, In: Manley, T.O. and P.L Manley (eds.), Lake Champlain in Transition: From Research Toward Restoration, Water Science and Application, AGU 1: 67–116.Google Scholar
  37. Myer, G. E., and Gruendling, G. K, 1979, Limnology of Lake Champlain. Lake Champlain Basin Study, New England River Basin Commission. 417 pp.Google Scholar
  38. Neumann, G. and W. J. Pierson, Jr., 1966, Principles of Physical Oceanography, Prentice-Hall, Inc., 545 pp.Google Scholar
  39. North, N. S., 1997, A pockmark field in the Cumberland Head area, Lake Champlain: unpublished senior thesis, Middlebury College, 55 p.Google Scholar
  40. Paull, E. K. and Dillion, W. P., 1981, Appearance and distribution of the gas hydrate refection in the Blake Ridge region, offshore southeastern United States, United States Geological Surveys.Google Scholar
  41. Paull, C., Ussler III, W., Maher, N., Greene, H.G., Rehder, G., Loernson, T., and Lee, H., 2002, Pockmarks off Big Sur, California, Mar. Geol. 181: 323–335.Google Scholar
  42. Pedersen, R. C., 1992, Pockmark formation in Burlington Bay: unpublished senior thesis, Middlebury College, 63 p.Google Scholar
  43. Pickrill, R.,1993, Shallow seismic stratigraphy and pockmarks of a hydrothermally influenced lake, Lake Rotoiti, New Zealand, Sedimentology 40: 813–828.Google Scholar
  44. Platt, J., 1977, Significance of pockmarks for engineers, Offshore Engineer, August, Letters and Books Section, pp. 45.Google Scholar
  45. Pond, S and G. Pickard, 1983, Introductory Dynamical Oceanography 2d edition, Pergamon Press, 329 pp.Google Scholar
  46. Rise, L, Saettem, J., Fanavoll, S., Thorsnes, T., Ottesen,D., and Boe, R., 1999, Sea-bed pockmarks related to fluid migration from Mesozoic bedrock strata in the Skagerrak offshore Norway, Mar. and Petr. Geol 16: 619–631.CrossRefGoogle Scholar
  47. Sayward, S. E., 1996, The hydrodynamic system of Burlington Bay, lake Champlain, Vermont: unpublished senior thesis, Middlebury College, 54 p.Google Scholar
  48. Scalon, K. and Knebel, H., 1989, Pockmarks in the floor of Penobscot Bay, Maine, Geo-Mar. Letters 9.53–58.Google Scholar
  49. Shanley, J. B. and Denver, J. C., 1999, The hydrology of the Lake Champlain Basin,, In: Manley, T.O. and P.L Manley (eds.), Lake Champlain in Transition: From Research Toward Restoration, Water Science and Application, AGU 1: 41–66.Google Scholar
  50. Stanley, R.S., 1987, The Champlain thrust fault, Lone Rock Point, Burlington, Vermont, in Roy, D.C., ed., Northeastern section of the Geological Society of America: Centennial field guide: Boulder, Geological Society of America:225–228.Google Scholar
  51. Solheim, A. and Elverhpi, A., 1985, A pockmark field in the Central Barents Sea; gas from a petrogenic source?, Polar Res. 3:11–19.Google Scholar
  52. Teller, J.T., 1987, Proglacial lakes and the southern margin of the Laurentide Ice Sheet, in Ruddiman, W. F. and H.E. Wright, J., eds., North America and adjacent oceans during the last deglaciation: Boulder, Geological Society of America:39–69Google Scholar
  53. Thibodeau, M., 1996, The origin and distribution of methane in Lake Champlain sediments: Northeastern Geology and Environmental Sciences 18: 130–136.Google Scholar
  54. Thompson, S. D., 1994, Documenting the effects of the internal seiche in Lake Champlain on a Shallow Bay: Thompson’s Point Bay, Lake Champlain, Vermont,: unpublished senior thesis, Middlebury College, 54 p.Google Scholar
  55. Watzin M., P. Manley., T. O. Manley, and S. A. Kyriakeas, Lakebed pockmarks in Burlington Bay, Lake Champlain IL Habitat Characteristics and Biological Patterns, This volume.Google Scholar
  56. Whiticar, M., 2002, Diagenetic relationships of mathanogenesis, nutrients, acoustic turbidity, pockmarks and freshwater seepages in Eckernfdrde Bay, Mar. Geol. 182: 29–53.CrossRefGoogle Scholar
  57. Whiticar, M. and Werner, F., 1981, Pockmarks; submarine vents of natural gas or freshwater seeps? Geo-Mar. Letters 1: 193–199.Google Scholar

Copyright information

© Springer Science+Business Media New York 2004

Authors and Affiliations

  • Patricia L. Manley
    • 1
  • T. O. Manley
    • 1
  • Mary C. Watzin
    • 2
  • Josh Gutierrez
    • 1
  1. 1.Geology DepartmentMiddlebury CollegeMiddleburyUSA
  2. 2.Rubenstein Ecosystem Science Laboratory, School of Natural ResourcesUniversity of VermontBurlingtonUSA

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