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A nice Dictyonema flabelliforme dendroid graptolite from Oslo Fields in Norway. It's Tremadoc, Lower Ordovician in age and is thus maybe around 480 mya. Another angle :
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This was found in Maine, but was likely brought in as crushed rock from Quebec by a Canadian railroad company. Dendroid graptolite is my opening guess.
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Dear all, I recently went for a trip to Wrens Nest and found this small, what I believe Dendroid Graptolite. It measures ~2cm (apologies for the poor quality of the image). If anyone could suggest a Sp. ID, or even if it is a Graptolite that would be very much appreciated. Thanks, Tom