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Old November 27th 03, 02:55 PM
George
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Default Delta-Like Fan On Mars Suggests Ancient Rivers Were Persistent


"Robert Ehrlich" wrote in message
news:OG9xb.234975$9E1.1277445@attbi_s52...
How often to deltas take uturn bends? Debris flows are subject to local
topography and structure, they can ricochet off barriers, deflect off
the earlier (days, hours, minutes deposits) and even go uphill aways.
At some point they "freeze" essentially instantaneously and produce
lobes. The terminations on the "deltaic lobes" seem to be too abrupt
and blunt for water-dominated deltas.
George wrote:

"Robert Ehrlich" wrote in message
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all due repect to NASA but the thangs look like debris-flow lobes --
debris flows don't require water

Joe Smith wrote:




How often do you see debris flow lobes make u-turn bends?






Meander bends are, in fact, a very common occurance on river deltas:

http://maps.unomaha.edu/Maher/geo101/tablea.html