Naked Science Forum
Non Life Sciences => Geology, Palaeontology & Archaeology => Topic started by: Coolsmoke on 10/10/2016 17:47:41
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Hi folks,
I've just registered to post an email to ask for some help from any geologists out there.
My fiancee is building a house in the county of Devon UK. As part of the groundwork, we had to excavate a hill and discovered some rather weird striations.
Among them are at least three layers of what appears to be peat. It's oily, soft and brittle but I've blowtorched it and it doesn't burn.
Can anyone tell me what this stuff is?
Thanks in advance for you replies!
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im guessing its a carboniferous shale. Is it inbetween sandstone?
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From the little I know about Devon's geology, it's likely that the intervening strata are indeed sandstone - although they look like no sandstone I know of.
Thanks for your answer :)
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That sort of black material is carbon and can demarcate the route of an ancient river or watercourse. In these cases it originates from sediment deposited on the river bed.
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Likely low-grade coal or carbon, but the other possibility is manganese oxide.