 In his 1961 novel "Jason", Henry Treece depicts the Symplegades as icebergs that drifted downriver into the Black Sea.The Symplegades are sometimes identified with (or confused with) the Planctae () or Wandering Rocks, which are mentioned in the "Odyssey" and Apollonius of Rhodes' "Argonautica".In Apollonius's telling, the Symplegades were encountered on the way to the Golden Fleece and the Planktai were encountered on the return voyage.