YoursTrue's Link #3739 above says in paragraph 1 of the Introduction,I am saying that the article you linked does not state that lava can move sediment.
In other words, it does not support your claim.
Sediment is carried from the volcano to the sea to be stored for a time in subaqueous borderland environments, and then remobilized and carried into deep marine basins (Fisher, 1984). During times of quiescent volcanism, smaller volumes of pyroclastic, hydroclastic and volcanic epiclastic sediment are remobilized by similar flow transformations (Walton, 1979).
Is that not to the point?