Passage 8.24.11
τὰς δὲ Ἐχινάδας νήσους ὑπὸ τοῦ Ἀχελῴου μὴ σφᾶς ἤπειρον ἄχρι ἡμῶν ἀπειργάσθαι γέγονε δὴ αἰτία τὸ Αἰτωλῶν ἔθνος, γεγόνασι δὲ αὐτοί τε ἀνάστατοι καὶ ἡ γῆ σφισι πᾶσα ἠρήμωται· ταῖς Ἐχινάσιν οὖν ἅτε ἀσπόρου μενούσης τῆς Αἰτωλίας οὐχ ὁμοίως ὁ Ἀχελῷος ἐπάγει τὴν ἰλύν. μαρτύριον δέ μοι τοῦ λόγου· ὁ γὰρ Μαίανδρος διὰ τῆς Φρυγῶν καὶ Καρῶν ἀρουμένης ὅσα ἔτη ῥέων τὴν μεταξὺ Πριήνης καὶ Μιλήτου θάλασσαν ἐν οὐ πολλῷ χρόνῳ πεποίηκεν ἤπειρον.
As for the Echinades islands, it is the people of Aetolia who are responsible for their not having been joined to the mainland by the river Achelous even down to our own time. For the Aetolians have themselves become refugees, and all their land has been abandoned. Since Aetolia thus remains uncultivated, the Achelous does not deposit silt towards the Echinades as it once did. As proof for my statement: the river Maeander, flowing year by year through a region cultivated by Phrygians and Carians, has within a short period turned the sea between Priene and Miletus into dry land.