Just to add my own 2 cents worth: coal dust (plentiful in any coal mine - as witnessed by many a prematurely deceased coal miner from related lung disease) can accrete around objects and solidify around it under a number of circumstances which include moisture, pressure & time.
I too wonder why creationists readily defend Baugh's reluctance to get these items properly tested by professional laboratories and yet automatically dismiss the opinions of people knowledgable about geological processes?
One way or the other, knowing for sure is better than having your beliefs associated with charlatanry surely?
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