natural boundary
21Natural history of Minnesota — The terrestrial biomes of Minnesota, prior to European settlement. Tallgrass aspen parkland/prairie grasslands in yellow, eastern deciduous forest in olive green, and the northern boreal forest in dark green. The natural history of Minnesota… …
22Boundary layer — For the anatomical structure, see Boundary layer of uterus. Boundary layer visualization, showing transition from laminar to turbulent condition In physics and fluid mechanics, a boundary layer is that layer of fluid in the immediate vicinity of… …
23Boundary layer transition — The process of a laminar boundary layer becoming turbulent is known as boundary layer transition. This process is an extraordinarily complicated process which at present is not fully understood. However, as the result of many decades of intensive …
24Boundary Waters — The Boundary Waters is a region of wilderness straddling the Canada–United States border between Ontario and Minnesota, in the region just west of Lake Superior. This region is part of the Superior National Forest in northeastern Minnesota, and… …
25Natural Resources Canada — Departments of the Government of Canada Natural Resources Ressources Naturelles …
26Boundary Treaty of 1970 — The 1970 Boundary Treaty between the United States and Mexico settled all then pending boundary disputes and uncertainties related to the Rio Grande (Río Bravo del Norte) border. The most significant dispute remaining after the Chamizal… …
27Natural prolongation principle — The natural prolongation principle or principle of natural prolongation is a legal concept introduced in maritime claims submitted to the United Nations. The phrase denotes a concept of political geography and international law that a nation s… …
28Natural history of Australia — The natural history of Australia has been shaped by the geological evolution of the Australian continent from Gondwana and the changes in global climate over geological time. The building of the Australian continent and its association with other …
29List of Greater London boundary changes — There have been a considerable number of small changes to the Greater London boundary since its creation in 1965. The most significant of these were the 1969 transfers of Knockholt to Kent and Farleigh to Surrey[1] and a series of minor… …
30public boundary — A natural boundary; a natural object or landmark used as a boundary or as a beginning point for a boundary line …
