The central zones of the levees and most lobes were surficially washed by recessional-stage water flows that moved winnowed granules, sand, and mud off the fan.
(The central zones of the levees and most lobes; were surficially washed; by recessional-stage water flows) (recessional-stage water flows; moved; winnowed granules, sand, and mud off the fan)
The central zones of the levees and most lobes recessional-stage water flows
were surficially washed moved
by recessional-stage water flows
winnowed granules, sand, and mud off the fan