Can someone please explain to me where and how the rules indicate that a D+D world would not or cannot have plate tectonics - a result of the natural movement of molten earth - because earth is an element??? (the one exception would be a hollow world with no molten core; plate tectonics would not exist here, but nor would most other physical things from our world - e.g. enough gravity to hold you down - without some serious explaining)
And, while you're at it, please also explain why weather (a result of the natural movement and mixing of air [another element]) *does* exist?
If you've got weather, internal consistency dictates you've got tectonics. Conversely, if you don't have tectonics, internal consistency dictates you don't have weather...which would make many things very difficult indeed.
Lane-"BSc Geography"-fan