No. Not liquid water. Ice, dust and rocks. Chasma Boreal:

Originally posted by IX-777Yes, that is probably snow, as some ESA scientists said some time ago, they think that water sublimates from the south pole and is transported in the clouds over to the north pole, where it falls as snow, and they think that's how the polar ice caps "move" from north to south and from south to north over time.
My ultimate evidence of liquid water oceans on Mars:
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Notice the above image - it clearly shows snow covering the huge cliffs, and the reflection of the cliffs on the water ice below, as well as broken up ice flakes further away from the shores just as seen on earth. Typical red tint / filter added which makes details harder to see but still obvious.
