The 42nd northern latitude
60 degrees north latitude
The two states that have borders ending at 40 degrees north latitude are Colorado and Nebraska. This latitude line forms part of the boundary between these two states in the central United States. Additionally, it also marks the northern border of Kansas to the south.
The only state with part of its boundary defined by the arc of a perfect circle is Wyoming. The eastern boundary of Wyoming follows the 42nd parallel north latitude line, which forms part of a perfect circle around the Earth.
Mid-latitude cyclones typically produce both a cold front and a warm front. These will usually merge to form an occluded front.
Spain is the only country to border Portugal to the east.
60 degrees north latitude
7
The Potomac river
The southern half of the eastern boundary of Alabama is the Chattahoochee River.
The Mediterranean Sea
The parallel of latitude approximately 66°33′ north. It forms the boundary between the North Temperate and North Frigid zones.
The Atlantic Ocean forms the eastern boundary of the Southeast, while the Gulf of Mexico forms the southern boundary.
In geographical terms, this would be whether Nevada is south of Idaho. Yes, the state of Nevada forms part of the southern border of Idaho.
The Ohio River forms Ohio's southern border.
Most of the northern boundary is formed by the Alps. However, on the Iberian Peninsula, the Pyrenees form another northern border of Southern Europe.
Ohio River
Both Chile and Argentina, close to Antarctica.