This cutting off was caused largely by subsidence, though partly by marine action.
It does not, however, form a delta proportionate to the volume of its water, owing to a strong sea current flowing northwards close to the shore, to the sudden sinking of the sea to a great depth immediately off the mouth of the river, and possibly also to the permanent subsidence of the Italian coast from the Tiber .mouth southwards to Terracina.
The legend may be a greatly exaggerated version of some actual subsidence of inhabited land.
There resulted a widespread and violent though ephemeral controversy, after the subsidence of which he published a Lecture on Tradition, which passed through several editions, and a volume on The Thirty-nine Articles of the Church of England.
At the time of the last great subsidence, in glacial times, an arm of the sea extended across Sweden, submerging a great part of the littoral up to the Gulf of Bothnia, and including the Plies period the this of themnorthe and Baltic were s fg ficiently salt for oysters to flourish.