This region is one of the largest outflow channels on Mars, the result of a huge flood (possibly an amount of water equivalent to the volume of all five Great Lakes) over a short period of time flowing into the martian northern lowlands.
(This region; is; one of the largest outflow channels on Mars) (a short period of time; flowing; into the martian northern lowlands)
This region a short period of time
is flowing
one of the largest outflow channels on Mars
into the martian northern lowlands