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SUMMARY:The role of meta-stable fluids in present-day surface processes on
  Mars: a laboratory investigation - Dr Susan Conway (The Open University)
DTSTART:20151123T170000Z
DTEND:20151123T180000Z
UID:TALK60711@talks.cam.ac.uk
CONTACT:Matouš Ptáček
DESCRIPTION:High resolution repeat-imaging of the martian surface has reve
 aled that it is more active than we once thought. Aeolian processes have b
 een observed in action\, including ripple-migration and dust-devil tracks\
 , but a greater surprise was the discovery of seasonally elongating RSL (r
 ecurring slope lineae) and modifications to gully-like forms. Both these f
 eatures resemble flows of liquid water\, yet this phase of water is not st
 able under current martian conditions. The alternative is that these featu
 res are formed by sublimation of solid carbon dioxide\, which is deposited
  directly from the atmosphere each winter. However there is no good terres
 trial analogue for this process to guide and constrain our interpretations
 . In this seminar\, I'll present some results from on-going laboratory sim
 ulation experiments in the Mars Chamber at the Open University in Milton K
 eynes. The objective of these unique experiments is to investigate the sed
 iment transport capacity and behaviour of metastable liquid water and of s
 ublimating carbon-dioxide under present martian conditions.
LOCATION:Harker Room 1\, Department of Earth Sciences
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