Location of Lahijan

through thin silty and clayey material; it has thus abandoned its former northeastward course, which flowed into the sea at the prominent angle of the plain near Dastak, and presently flows northwards and builds a smaller living delta jutting out into the Caspian between Zibakenar and Bandar kiashahr.

The Fumanat plain to the west intermingles marine alluvial deposits and former sandy beach-lines with abundant alluvial deposits from the numerous rivers draining the southern part of Talesh highlands. They do not reach directly the sea, but converge into the lagoon of Anzali with a single outlet to the Caspian through the dune-covered sandy coastline. The lagoon is constantly getting smaller and shallower under the effect of silting. On the contrary, the streams of northern Talesh and eastern Gilan, even the more abundant Polrud, do not bring alluvium enough to counterbalance the action of a coastal current going eastward, and thus could not build more than a narrow ribbon of lowlands, only a few kilometers wide between Astara and Safid-rud and to the east of Qasemabad, and some 10 km wide at the mouth of the Polrud around kelachay