Early Atlantic crossing

When people move, they take their languages with them. It used to be
taken as dogma that when men moved from Siberia across the dry bed of
the Bering Sraits to Alaska in the Ice Age, they could get no further
until the ice melted back enough to make a corridor between the
northern ice and the Rocky Mountains ice. But now I heard of a theory
that the Solutrean people of southwest France lived like Eskimos do
now and crossed the Atlantic to America in Eskimo-type skin boats
about 15000BC living by spearing seals etc and skirting the edge of
the icepack and hauling out onto ice floes when they needed a rest.