Murray J. B. * Muller J.-P. Neukum G. Werner S. C. Hauber E. Markiewicz W. J.
Head J. W. III Foing B. H. Page D. Mitchell K. L. Portyankina G. HRSC Investigator Team.
Evidence from HRSC Mars Express for a Frozen Sea Close to Mars’ Equator [#1741].
"We present evidence for a presently-existing frozen sea, with surface pack-ice, at 5°N, 150°E,
age ca. 5 million years. It measures ca. 800 × 900 km and averages ca. 45 m deep. It has probably been protected from complete sublimation by ash and a sublimation lag of exposed sediment."
ftp://www.lpi.usra.edu/pub/outgoing/lpsc2005/full97.pdf

Bob Clark