publication . Part of book or chapter of book . 2012

Source-to-Sink: An Earth/Mars Comparison of Boundary Conditions for Eolian Dune Systems

GARY KOCUREK; RYAN C. EWING;
Open Access
  • Published: 01 Jan 2012
  • Publisher: SEPM (Society for Sedimentary Geology)
  • Country: United States
Abstract
Eolian dune fields on Earth and Mars evolve as complex systems within a set of boundary conditions. A source-to-sink comparison indicates that although differences exist in sediment production and transport, the systems largely converge at the dune-flow and pattern-development levels, but again differ in modes of accumulation and preservation. On Earth, where winds frequently exceed threshold speeds, dune fields are sourced primarily through deflation of subaqueous deposits as these sediments become available for transport. Limited weathering, widespread permafrost, and the low-density atmosphere on Mars imply that sediment production, sediment availability, and...
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