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A lee trough, also known as a dynamic trough, is "A pressure trough formed on the lee side of a mountain range in situations where the wind is blowing with a substantial component across the mountain ridge; often seen on United States weather maps east of the Rocky Mountains, and sometimes east of the Appalachians, where it is less pronounced."
The border between North America and South America is at some point on the Darién Mountains watershed that divides along the Colombia–Panama border where the isthmus meets the South American continent (see Darién Gap). Virtually all atlases list Panama as a state falling entirely within North America and/or Central America. [116] [117]
The Continental Divide in North America in red and other drainage divides in North America The Continental Divide in Central America and South America. The Continental Divide of the Americas (also known as the Great Divide, the Western Divide or simply the Continental Divide; Spanish: Divisoria continental de las Américas, Gran Divisoria) is the principal, and largely mountainous ...
USGS map of Schuylkill-Lehigh River drainage divides A minor drainage divide south of Buckeye, Arizona. Both branches flow to the Gila River. Drainage divides can be divided into three types: [5] Continental divides in which waters on each side flow to different oceans, such as the Continental Divide of the Americas and the Congo-Nile Divide. [6]
I am very grateful to the many people on Twitter who commented on a draft of the map. I hope that you enjoy using the map as much as I did making it." Description on map: "Starting with the lowest area, Blue Earth Bathymetry depicts the ocean floor. Land colors are a mix of Natural Earth 2 and Copernicus Land Cover.
The Americas are recognized in the English-speaking world to include two separate continents: North America and South America. In parts of Europe and Latin America, America is considered to be a single continent, within which North and South America are regions. [2]
The gaps in the archipelago of Central America filled in with material eroded off North America and South America, plus new land created by continued volcanism. By three million years ago, the continents of North America and South America were linked by the Isthmus of Panama, thereby forming the single landmass of the Americas. [58]
The Great American Interchange in which land and freshwater fauna migrated between North America and South America via the uplifted western margin of the Caribbean plate (Central America) was a later event, which peaked dramatically around 2.6 million years ago during the Piacenzian age.