Complex sentence: Geographically, the Vosges Mountains are located wholly in France far above the Col de Saverne separating them from the Palatinate Forest in Germany, which logically continues the same "Vosges geologic structure" but traditionally receives this different name for historical and political reasons.
Split into simpler sentences: Geographically, the Vosges Mountains are located wholly in France, far above the Col de Saverne separating them from the Palatinate Forest in Germany. The latter area logically continues the same "Vosges geologic structure" but traditionally receives this different name for historical and political reasons.