The Colorado River forms the west boundary of Arizona with California and Nevada.
Natural
Iowa is bordered by the Missouri River and the Big Sioux River on the west.
Yes, that is the Greenwich Meridian.
Egypt's natural boundary to the east is the Red Sea and Suez Canal. To the south and west there are no natural boundaries and it is often impossible to say if you are in Egypt or Libya.
Is Texas east or west of Arizona?Texas is east of Arizona.
New Mexico is bordered by Arizona to the west.
The Ural Mountains separate the northern European and west Siberian plains. They form a natural boundary between Europe and Asia.
The Arizona-Grand Canyon National Park is located on a tectonic plate boundary known as a transform boundary where the North American Plate and the Pacific Plate interact.
The Amazon River in South America is an example of a natural boundary. It is a natural boundary because it is formed by a physical feature of the landscape, in this case, a river, that defines the border between different regions or countries.
New Mexico is west of Arizona.
Arizona is in the south west of America.
To the west of Arizona is not any other country. It is still the United States, as Arizona is an inland state.