In the west the Rhône Glacier covered large parts of the Swiss Plateau and reached as far north as the northern Folded Jura and as far south as Lyon. To the northeast, it transitioned without any sharp demarcation into the Linth Glacier and Reuss - Aare Glacier; only the Napf area remaining ice-free. Further to the northeast, the Reuss-Aare Glacier combined with the Rhine glacier. This extended north beyond the present-day River Danube to the area of the Swabian Jura. In Bavaria, the Riss moraines form a little subdivided countryside without bogs and lakes, where they are not covered by the younger deposits of the Würm glaciation. The gravels associated with the Riss moraines form the present high terraces of the Danube tributaries.