Ponds can silt up into swamps which turn into grasslands that grow coniferous trees that give way to deciduous ones later.
It's pretty predictable mathmatically, if you take into account the land rising/falling, silting and evaporation. All you have to do is place the appropriate swampland, pond or grasslands where you need them. Vary the depth of parts of the pond and swamp to suit your needs over 500 years.
Over 300-500 years a watery duck can turn into a green fuzzy bunny or the face of a man can grow old as his beard gets longer.
Perhaps, this has been done before and we may want to look at what has been left for us.-- sartep, Apr 22 2004 Great if it works. BTW, do you have any idea how much that name looks like the name for a certain preservation process?-- 5th Earth, Apr 22 2004 Very Druidic.-- 2 fries shy of a happy meal, Apr 22 2004 For some reason I feel a little sad when I happen upon a tree-overgrown foundation of someone's long ago farm or summer house and think of the time and sweat that was put into the structure and land.-- FarmerJohn, Apr 22 2004 Yeah, I hear ya John.-- sartep, Apr 22 2004 This idea reminds me of a nascent idea I had - the Million Year Building. The contest would be to devise a structure which would be recognizable as a human endeavor 1 million years later. HP Lovecraft's ancient races pulled this off all the time, but I think it would be difficult.
Candidates which I think might make it a million years might be huge sculptures like Mt Rushmore or Crazy Horse Mountain - but even then erosion might make them hard to recognize. The Hoover Dam people thought the dam might outlast our civilization - but I bet not a million years. [sartep]'s idea here would be a different way to go about this: a construct which evolves in such a way as to retain its form after time. But a million years is a long time.-- bungston, Apr 22 2004 It took me a long time to click on this idea because I had automatically dismissed it as a misspelling of 'lamination'. I'm going to click 'for' just because I was too quick to judge, and despite the fact that you did misspell 'mathematically'. (I hope that's not just a correct British spelling)-- snikrepkire, Apr 23 2004 All in favor of anything made to last over the millennia, whether it changes or not, so croissant. I don't think it's quite so easy to plot out how large scale things will change over time, though. Plenty of urban and suburban developments have seen lakes dry and lawns turn to swamps entirely unintentionally.-- DrCurry, Apr 23 2004 random, halfbakery