Advertisement

Geo-Marine Letters

, Volume 19, Issue 1–2, pp 164–168 | Cite as

Freshwater ice rafting: an additional mechanism for the formation of some high-latitude submarine pockmarks

  • C. K. Paull
  • W. Ussler III
  • W. S. Borowski

Abstract

 Submarine pockmarks are common features on high-latitude continental shelves, yet the mechanisms for their formation are poorly understood. Here we propose an additional mechanism for the formation of high-latitude pockmarks involving freshwater ice rafting. Freshwater seeping upward through the sediments freezes at the sediment–water interface when bottom waters are below 0°C. Thin layers of the frozen water containing some sediment are buoyant and can rise off the bottom as small ice rafts, thereby excavating a seafloor depression over time. Sediment in the ice rafts becomes entrained in bottom currents and is dispersed over a wide area.

Keywords

Depression Thin Layer Continental Shelf Bottom Water Wide Area 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Copyright information

© Springer-Verlag Berlin Heidelberg 1999

Authors and Affiliations

  • C. K. Paull
    • 1
  • W. Ussler III
    • 1
  • W. S. Borowski
    • 2
  1. 1.Monterey Bay Aquarium Research Institute, Moss Landing, CA 95039, USAUS
  2. 2.Exxon Exploration Company, Box 4778, Houston, TX 77060, USAUS

Personalised recommendations