36. In countries where the beds of sediment have preserved their horizontal position, in order to reach that of the first formation, it is necessary to pass through all the others, often to a great depth, at the end of which one invariably finds the granite rock. But, when these beds have been elevated into mountains, they have been carried above their normal level, sometimes to a very great height, in such a way that, if one makes a vertical trench upon the side of the mountain, they are shown in all their thickness, superposed like the different layers of a building.
This explains why quite large beds of marine shell fossils are often found on high elevations of land. It has been generally recognized that at no epoch the sea has been able to attain such a height; for all the water on the Earth is not sufficient for it, and would not be even were it a hundred times greater in volume. Some might say that the quantity of water had diminished; but then the query would come. What had become of it? The uprisings which are now incontestably demonstrated by science explain completely and logically the marine deposits which are found upon certain mountains. *
* Beds of marine shell fossils were found five thousand meters above the sea level, in the Andes of South America.