Boundaries between the continents of Earth Boundaries between the continents of Earth The boundaries between the continents of Earth are generally a matter of geographical convention. Several slightly different conventions are in use. The number of continents is most commonly considered seven but may range as low as four when the Americas and Afro-Eurasia are each considered a single continent. According to the definition of a continent in the strict sense, an island cannot be part of any continent, but by convention and in practice most major islands are associated with a continent. There are three overland boundaries subject to definition: While the isthmus between Asia
Karain semi-continent the continent is reputed to be unbroken jungle surrounding the river. The largest lake is at the headwaters of the Karain River, Lake M'Pulo. This in turn is fed by a number of large rivers (the Treacher, the Ono, the Turain, the Kasiholo, the Loborango, the M'Pulo, and the Puchiaihipopolobanjo), which are themselves fed by runoff from the mountain range that separates Islandia from the rest of Karain. The only city of note on lake M'Pulo is Todojil, and to its south and west is the massive Karain Swamp, which forms the upper end of the German Protectorate. The Karain