The Bay of Bothnia was under ice until the "Ancylus Lake" period (7500–6000 BC), when the ice sheet withdrew to the mountains of Northern Scandinavia.
A baía de Bothnia estaba baixo xeo ata o período de "Ancylus Lake" (7500-6000 & nbsp; BC), cando a capa de xeo retirouse ás montañas da Escandinavia do Norte.