Possible ancient oceans on Mars: evidence from Mars Orbiter Laser Altimeter data.

  title={Possible ancient oceans on Mars: evidence from Mars Orbiter Laser Altimeter data.},
  author={James W. Head and Harald Hiesinger and Mikhail A. Ivanov and Mikhail A. Kreslavsky and Sheldon D. Pratt and B. J. Thomson},
  volume={286 5447},
High-resolution altimetric data define the detailed topography of the northern lowlands of Mars, and a range of data is consistent with the hypothesis that a lowland-encircling geologic contact represents the ancient shoreline of a large standing body of water present in middle Mars history. The contact altitude is close to an equipotential line, the topography is smoother at all scales below the contact than above it, the volume enclosed by this contact is within the range of estimates of… 
Mars northern plains ocean
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Northern lowlands of Mars: Evidence for widespread volcanic flooding and tectonic deformation in the Hesperian Period
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The Mars Orbiter Laser Altimeter (MOLA), an instrument on the Mars Global Surveyor spacecraft, has measured the topography, surface roughness, and 1.064-μm reflectivity of Mars and the heights of


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An ancient north polar ocean on Mars has been proposed [Parker et al., 1989] and we use MOLA data to test the hypothesis. Of the two proposed contacts/shorelines, the younger Contact 2 shows the
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Elevations measured by the Mars Orbiter Laser Altimeter have yielded a high-accuracy global map of the topography of Mars. Dominant features include the low northern hemisphere, the Tharsis province,
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Estimates of the amount of water outgassed from Mars, based on the composition of the atmosphere, range from 6 to 160 m, as compared with 3 km for the Earth. In contrast, large flood features, valley