Has the proportion of land vs water on earth changed since Pangea?
1) For a given configuration of the continents, the proportion could change with a variation of the global temperature (Ice Age). 2) According to this article, sea level varies: “It is known that sea level is generally low when the continents are together and high when they are apart. For example, sea level was low at the time of formation of Pangaea (Permian) and Pannotia (latest Neoproterozoic), and rose rapidly to maxima during Ordovician and Cretaceous times, when the continents were dispersed.” Source and further information: http://en.wikipedia.org/wiki/Supercontinent_cycle It the continent shapes do not change much (tectonic plates), but they separate from each other, sea level will rise and the proportion of water to land on Earth should grow.
