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Thread: How deep in the ground can clay be found?

  1. #1 How deep in the ground can clay be found? 
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    Thanks. Filix


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  3. #2  
    Universal Mind John Galt's Avatar
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    Clay grades impercepibly into claystone and shale through the process of diagenesis. Certainly I have seen clays returned in drilling from depths in excess of 2,000'. However it is unclear to what extent hydration of the clays had occurred through exposure to water base mud. It might be easier to provide a relevant answer if we knew why you wanted to know.


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  4. #3 clay 
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    Thank you John. The reason why I ask is a friend of mine is drilling his well and was getting clay hundreds of feet down. I always just assumed that clay was found more on top. Filix.
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