Ok, this is a serious question. I feel ashamed not to know the answers, but I never understood this.
I was standing in an early medieval church in Ireland a few years back. It had been excavated and its ground floor was now at least a meter below ground. How did it get there?
I don’t understand the process, of how pottery, churches, spearheads, streets or dinosaur bones for that matter, disappear below ground. I know that the ground consists of layers, and that geologists can determine the date of a find, by looking at the layer it comes from. But how are these layers formed? I don’t suppose the earth got any bigger? Where did the ground on top of these finds come from? How does the earth burry its own history?
Now I know that floods, wind and volcanic activity can shift soil and leave deposits, but surely that cannot account for all of this. And then how is it possible that in Australia the remains of pre-historic campfires can still be found on the surface?
Thanks!
2007-02-14
07:00:17
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3 answers
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asked by
thijspieters
2