

The fact that it does not come from the collision of plates, but is a glacially scoured river valley, accounts for its relative shallowness. The Baltic Sea is a brackish inland sea, the largest body of brackish water in the world. Phytoplankton bloom in the Baltic Proper ( July 3, 2001)

The latter name could have influenced the Baltica myth because Baltic tribes lived on the shores of the Baltic Sea in ancient times and had contacts with the Mediterranean civilisations being a well-known source of amber for ancient Greece and later for the Roman Empire.

Still another proposed derivation from the Indo-European root * bhel meaning white, shining (note that 'baltas' means 'white' in today's Lithuanian language, for example). Another possibility is that Adam of Bremen connected to the Germanic word belt, a name used for some of the Danish straits, while others claim it to be derived from Latin balteus (belt). He may have based it on the mythical North European island Baltia, mentioned by Xenophon. The first to name it the Baltic Sea (" Mare Balticum") was 11th century German chronicler Adam of Bremen.
