Which two continents are part of one huge land mass, separated by a chain of mountains?

Europe and Asia parts of one huge land mass and they are separated by a chain of mountains. Asia and Europe also share one mass of land. They are also joined in a one large land mass. Europe is a continent and it is the western part of Eurasia. Asia is also a continent, not only a continent but the largest and most populous continent. They are separated by the Ural Mountains in Russia and the Bosporus Strait in Turkey.

I'm pretty sure it's c. extremely gradual but not 100% sure though.