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A natural border is a border between states or their subdivisions which is concomitant with natural formations such as rivers or mountain ranges. The "doctrine of natural boundaries" developed in Western culture in the 18th century being based upon the "natural" ideas of Jean-Jacques Rousseau and developing concepts of nationalism . [ 1 ]
A landscape border is a mixture of political and natural borders. One example is the defensive forest created by China's Song dynasty in the eleventh century. [6] Such a border is political in the sense that it is human-demarcated, usually through a treaty. However, a landscape border is not demarcated by fences and walls but instead landscape ...
See below. Only land boundaries are considered; maritime boundaries are excluded; see the List of countries and territories by maritime boundaries. Disputed territories are not considered, other than the inclusion by necessity, in a neutral fashion, of Western Sahara.)
Because both damming and natural changes have rendered the 1792 shore virtually undetectable in many places, the exact boundary was decided in the 1990s in settlements among the states. [3] The boundary between Delaware and New Jersey north of 39° 30' north latitude is the east bank of the Delaware River. [citation needed]
Exclusive economic zone maritime boundaries in the Caribbean Sea and equatorial Atlantic Ocean EEZ maritime boundaries in the Pacific Ocean. The United States has land borders with Canada to the North, and Mexico to the South and a maritime boundary with Russia to the West, as well as with several countries of the extensive exclusive economic zone (EEZ) in respective regions.
The boundary between Asia and Europe is unusual among continental boundaries because of its largely mountain-and-river-based characteristics north and east of the Black Sea. Asia and Europe are considered separate continents for historical reasons; the division between the two goes back to the early Greek geographers .
Since ridgelines are sometimes easy to see and agree about, drainage divides may form natural borders defining political boundaries, as with the Royal Proclamation of 1763 in British North America which coincided with the ridgeline of the Appalachian Mountains forming the Eastern Continental Divide that separated settled colonial lands in the ...
1953 — Following the Korean War, the boundary between North Korea and South Korea is the Military Demarcation Line, which roughly follows the previous 38th parallel; 1954 — Bands of Indian irregulars took over the Portuguese enclaves of Dadra and Nagar Haveli. On June 13, the port of Mahé breaks away from French rule and joins India.