The river flowing into the valley caused a great, muddy morass.
The men rode through the morass and up the slope.
The land slopes gently and drains into a considerable number of streams, turning the land into a morass of reeds and papyrus.
A salt morass was on the lower end of the lake.
It was hoped that the cavalry would plunge into the morass.
The remainder of the island consists chiefly of pasture and morass.
The latter, after long baffling the king's attempts to bring him to battle, had taken up a strong position south of the town behind a morass.