Red River
Ural
The Ural Mountains form the eastern boundary of the North European Lowland landform. They separate the lowland from the Western Siberian Plain in Russia.
The Ural Mountains form the eastern boundary of Europe. These mountains separate Europe from Asia and stretch approximately 1,550 miles from north to south.
Two rivers partially form Illinois State's Eastern boundary. The Wabash River is one river that forms Illinois' boundary. The Ohio River is the other river that forms the state's boundary.
The Ural Mountains form the western boundary for the continent of Asia.
The Appalachian Mountains form a boundary with the Canadian Shield. The Canadian Shield is a large geological formation covering much of eastern and northern Canada, while the Appalachian Mountains run along the eastern coast of North America, from Alabama in the U.S. to Newfoundland in Canada.
western
The Ural Mountains,the Ural river,and the Caspian Sea.
The Andes Mountains form Chile's natural eastern boundary, while the Pacific Ocean acts as its natural western boundary.
The ridge of the Great Smokey Mountains form the boundary between Tennessee and North Carolina. They are a subrange of the Appalachian range and a part of the Blue Ridge Physiographic Province. To the West is the Cumberland Plateau.
No, they formed the eastern boundary, in the form of the continental divide.
There are three lakes that form part of the northeatern boundary of South Dakota. They are Mud Lake, Lake Traverse, and Big Stone Lake.