Sea of Marmara about 22 parts per thousand, which is slightly greater than that of the Black Sea, but only about two-thirds that of most oceans. The water is much more saline at the sea bottom, averaging salinities of around 38 parts per thousand, similar to that of the Mediterranean Sea. This high-density saline water, like that of the Black Sea, does not migrate to the surface. Water from the Susurluk, Biga (Granicus) and Gonen Rivers also reduces the salinity of the sea, though with less influence than on the Black Sea. With little land in Thrace draining southward, almost all of these
Ligurian language (ancient) place names and tribal names that classical authors state are Ligurian seem to be Celtic, it is incorrect to discard all the Celtic ones when collecting Ligurian words and to use this edited corpus to demonstrate that Ligurian is non-Celtic or non-Indo-European. The Ligurian-Celtic question is also discussed by Guy Barruol () in his 1969 paper "The Pre-Roman Peoples of South-East Gaul: Study of Historical Geography". Strabo indicates that the Ligurians were different from the Celts: Because of the strong Celtic influences on the language and culture, the Ligurians were known in antiquity as "Celto-Ligurians" (in Greek "Keltolígues") in some