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Author Topic:   Geologic Column
Peg
Member (Idle past 4166 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 25 of 55 (511838)
06-12-2009 8:26 AM
Reply to: Message 24 by RAZD
06-11-2009 11:16 PM


Re: mooved from
cheers radz

How consistent is it?

ie, if we choose a random location and dig down, would the rock strata be in that sequence?

and how reliable and consistent are the ages assigned to the different life-forms found in the layers?


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Peg
Member (Idle past 4166 days)
Posts: 2703
From: melbourne, australia
Joined: 11-22-2008


Message 30 of 55 (512179)
06-15-2009 6:47 AM
Reply to: Message 29 by RAZD
06-14-2009 9:22 PM


Re: consistent, pervasive, index fossils
thanks RAZD, thats a great rundown.

Charles Lyells book 'Principles of Geology' explains that all sedimentary rocks are deposited by extremely slow processes, such as rain washing loose sand down a mountain slope to a river. Is this theory still current today? Or has it changed?

the other thing i want to know is why geology and evolution are so closely linked? Shouldn't they be independent of each other?


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