Mälaren is the third biggest lake in Sweden (the biggest are Vänern and Vättern). It drains (from west to east) into the Baltic Sea at Stockholm. The easternmost bay of Mälaren, in central Stockholm, is called Riddarfjärden.
... on the west coast, and Tertiary conglomerates, sandstones, marls and clays, folded by subsequent upheavals, in many parts of the island. The clays, which contain layers of ...