As a geologist I feel I'm entitled to comment on this topic
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The Earth is 4.6 Billions years old - of that there is no question. The evidence comes from many sources and fits into everything else discovered in the univer, solar system and on Earth. Anyone want to discuss this further - feel free to PM me
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Evolution is now scientific fact - there is no other mechanism for deriving the vast array of creatures that exist and have existed on this planet. You may read about how scientists don't believe in Darwinian evolution (otherwise known as phylitic gradulism) but that's because they prefer punctuated equalibrium (a haitus of change followed by a rapid change) as the main mechanism. Both of these are evolution, but they differ on the detail. Genetiscist and biologists now need to clear up the molecular mechanism involved. They've not done too bad considering DNA hasn't been known about for that long yet!
To be honest, I am sick and tired of creationalists claiming the Earth is a few thousand years old and we were created by God. One can argue over what started the Big Bang (God is the favoured choice for many prominent scientists, such as Richard Faynmen), but the fact is; the Earth is 4.6 Billion years old. Every piece of evidence that creationalists use to argue their case is flawed or they ignore basic geological precepts (usually bescause they've never studied the subject!).
If you would like to know more on geological dating
click here. </ quick plug
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But heres a quick list of things that have to happen over the geological timescale:
o Metamorphism of rocks - takes millions of years for the chemical reactions to occur in the solid state
o Diagenesis of sediment - sediment to rock takes time (except for limestones, which can lithify in a matter of years)
o Plate tectonics - the UK was once at the south pole, we've joined up with the US, crossed the equator, then split from the US - that has to take time
o Magnetic reversals - there have been around 300 magnetic field reversals (thats when the Earths magnetic field switches ploarity) since the Mid-Jurassic. Thats an avergae of one every 300,000 years. If the Earth were only a 1000 years old, that would be one every 33 years! Anyone known the earth's field to reverse?
Here endeth the geology lesson
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