hi everyone,

okay right off i'll admit my knowledge of geology is about equivalent to a fly's knowledge of the universe. i'm wondering a few things for a story a buddy of mine was thinking of writing.. he was thinking about a story where evidence of pre-pangeac metallic structures were found buried a certain depth in the earth, as in buildings of a civilisation long before dinosaurs, etc.. whether the timeline is feasible or not doesn't really matter, what i'm wondering is if it might actually be possible that something could remain in tact roughly (at least definitive evidence of it), how deep in the rock it might be if we're talking say roughly a billion years in the past, and at that depth just what the earth actually is made of.

i'll let a geology nut take over now :)

:m:

If you want to make it believeable, hed have to find the billion year or older areaas of rock in the world, and then consider what they have been through in the past billion years. they are likely to have been metamorphosed to some extent, and htus any metal structures would haev been flattened, crushed, and melted. so the kind of allow it was wouldnt even b definitely identificable, since it would likely have absorbed elements from the surrounding rock when its been heated up. But certainly any such finds would give pause for thought. So, roughly speaking, evideence cold be found intact, but certainly not in anything like its original from.

what he said.

We have one billion year-old fossils - that's about when the first multi-cellular organisms appeared. We have even older fossils of bacteria and such.