28
Kosi
(Mega-Fan)
490
Po
600
Yellow
670
Saskatchewan
945
Rhine-Meuse
1400
Mississippi
Mean Avulsion Period (years)
River
Estimating the
duration of the delta
Deltaic versus fan
numbers considered more likely
No vegetation on
Mars, but floodplain may have been frozen much of the year:
stable floodplain?
Assume avulsion
period of 100-500 years?
11 avulsions = 1100
to 5500 years for topmost layer.
Data compiled by Bridge, 2003