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(Most irrelevant groups removed. I Read in sci.astro)
"George" wrote: Having spent years studying the strata, I can tell you with absolute certainty that I don't need a geology book to tell me the facts of the coal-bearing strata in Kentucky, and surrounding states. The earliest known occurrence of coal is found in the Upper Chester of Southern Indiana (upper Mississippian). Coal seams occur periodically from there up into the upper Pennsylvanian. The coal has many associated plant fossils, and the occasional trace animal fossils, and many secondary minerals associated with them. From the disorganized bits and pieces of info I've come across over the years, I've gotten the impression that coal formed from woody plants, until the first fungi or bacteria (which?) capable of digesting cellulose developed. And that oil formed from the bacterial mats which I gather were the only life form on Earth for a billion years or more. Are those impressions about right? -- Jeff, in Minneapolis .. |
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