While not considered continents due to their relatively small dimension, they could be considered microcontinents. Madagascar, the largest instance, is normally thought-about an island of Africa, but its divergent evolution has triggered it to be referred to as “the eighth continent” from a biological perspective. In many of those circumstances, the “subcontinents” concerned are on totally different tectonic plates from the the rest of the continent, providing a geological justification for the terminology. Greenland, typically reckoned as the world’s largest island on the northeastern periphery of the North American Plate, is sometimes referred to as a subcontinent. This is a major departure from the extra conventional view of a subcontinent as comprising a really large peninsula on the fringe of a continent. How did they determine the place to draw the line between islands and continents?