He will discuss research into how plant remains have been preserved in coal seams, which represent ancient swamp environments.
(He; will discuss; research; into how plant remains have been preserved in coal seams) (plant remains; have been preserved; L:in coal seams) (coal seams; represent; ancient swamp environments)
He plant remains coal seams
will discuss have been preserved represent
research into how plant remains have been preserved in coal seams
L:in coal seams
ancient swamp environments