Clashing Rocks

He gave them wise advice, too, about the dangers before them, in especial about the Clashing Rocks, the Symplegades, that rolled perpetually against one another while the sea boiled up around them.

The Greek hero sails through Harpies and clashing rocks to the Golden Fleece, guarded by the Hydra.

Long before the Argonauts reach the fabled land of Colchis, they defeat a tribe of giants, accidentally slaughter their own friends, pass through the ship-crushing Clashing Rocks and, worst of all, lose Heracles.

For instance, those clashing rocks that smash together in Jason and the Argonauts, crushing ships and drowning their crews, resemble – even more so in my early memory – the glowering volcanic island looming over the sea in Turner's painting Ulysses Deriding Polyphemus.

For instance, in my childhood perceptions, the clashing rocks the Argonauts have to sail between were even vaster and more sublime than when I see them today – and as for the skeleton army ...