Abstract

A FOAM-FORMATION like that described in NATURE of March 15, p. 468, is to be seen off the mouth of the Maeander (Mendere) River in western Asia Minor, when the river is in flood. The turbid river water establishes a sharp frontier with the clear sea-water, and when the breeze is on-shore, the sea-water breaks on the river water with sufficient force to accumulate a band of foam, several inches wide, which in turn retains scum and floating debris from the river. The foam band is carried by wind and current into arc-forms, which are the more conspicuous by reason of the contrast of water-colour within and without. For the salt and fresh waters do not readily mix, and the summary deposition of the silt at the point where the flood water is checked probably explains the very steep gradient of the delta escarpment.

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