Archaeology

[hc4361]

How does all the stuff they find get buried in the first place? I can understand objects but not foundations, floors and walls. It seems the earth grows a new layer every few years - I know it doesn't.

How does what should be on top end up underneath?

[cecil39]

thanks for asking that question hc i have often wondered about that, but surely the answers all mean that the world is bigger now than it was, say 1.000 years ago, so does it turn at a different speed the bigger it gets? and is it getting heavier as well? don't suppose anyone knows, not that we will have to worry about it.

[hc4361]

cecil, that was my thinking but maybe things have just redistributed.

It is strange to think there is no such thing as fresh water - just recycled. The water we have now is the same water the dinosaurs were drinking.

[Old_Geezer]

One might think so but it need not be, if what is happening is the plant roots lift nutrients from below, and eventually die and lie in the surface. My guess is that there would be growth though, since energy in the form of sunlight hits and is used by living things, plants in particular, for growth, effectively changing sunlight into mass ?

Hmm what is the definition of fresh water anyway ? If it's evaporated, condensed again, and fallen as rain then that seems fresh to me. I'm unsure how much is created anew from hydrogen and oxygen though. I'd suspect some.

[hc4361]

Not sure how reliable this site is, but this is how understood it to be

"There is the same amount of water on earth as there was when the earth was formed. The water that came from your faucet could contain molecules that Neanderthals drank…"


Read more: http://www.lenntech.c...cts.htm#ixzz1vAbY9JGF

[ChuckFickens]

Related to water on earth, this shows the total amount of water on the earth...

http://ga.water.usgs....ater-volume-large.jpg