I have time travelled and you are not st(satan)-owned.
It is exponential, but as the granite refolds on the mantle creating the mountains and actually "shrinking" the continents whole inner continents open.
http://www.freerepublic.com/focus/f-news/1424629/posts
This is why the theory in which the continents get submerged by the melting ice caps is completely bollocks ; it's granite floating right unto magma that is 3 times as dense, there is no way the earth will be flooded, it's all crusting up like sugar into sulphuric acid and the excessive water will actually cool down the magma infiltration and making the crust continue to, well... crust.
There is also an infinite supply of petroleum generation due to this phenomenon which is NOT the result of dinausaurs decomposition, this theory is ridiculous.
Ok lets not munch more than we can chew here !