Portions of the 'level' areas could be like a 'stepped terrace' type of terrain where the top part of the image is higher in elevation than the botttom portion of the image...BUT...in between there could be several 'level' areas with reguards to Mars' center of gravity...THUS...water could FLOW from the upper level ground and spill downward into the level areas until they fill up, making a small puddle, those fill up and spill over.

And we have to remember that the SURFACE temperature HAS been measured as high as 70 degrees farenheit. Also as the whole planet is on a warming trend more H2O is going from the poles into the atmosphere and increasing the air pressure. Until we send some METEROLOGICAL instruments that are moveable to measure that type data at different heights we will not have any scientific certainty. Why haven't they done something like this?...because we have only ROCK hounds in charge of Mars exploration...it's time for a change.

Bob...

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Say what you mean and mean what you say.

Don't make promises and policies you don't intend to keep and to keep the policies and promises you do make.