There isn't one.
Eurasia - Europe and Asia Afrasia - Africa and Asia America - North and South America
The combined land masses of Asia and Europe is called Eurasia.
The Ural Mountains are the common land mass of Europe and Asia.
Asia shares the European land mass with Asia beginnning east of the Ural Mountains in Russia.
What is the continents of asia are really parts of the same land mass?
Asia and Europe both share the same land mass.
This land mass is known as Eurasia.
Asia
Alaska
Beringia is the land mass that is believed to have connected Siberia and Alaska during the last Ice Age. It provided a pathway for early hunter-gatherers to migrate from Asia to North America around 20,000 years ago. Once the ice melted and sea levels rose, Beringia became submerged, separating the two continents.
Asia
The temporary land mass that linked Siberia and Alaska is known as Beringia, or the Bering Land Bridge. During the last Ice Age, lower sea levels exposed this land bridge, allowing hunter-gatherers to migrate from Asia to North America. This migration is believed to have occurred around 20,000 to 15,000 years ago, facilitating the movement of people and animals across the Bering Strait.