Activity Carrie Jolene posted a new specimen in the group Education and Outreach from the myFOSSIL app 2 years, 10 months ago 2 years, 10 months ago 2 years, 10 months ago Carrie Jolene has contributed a new specimen to myFOSSIL! MacKenzie Smith replied 2 years, 10 months ago The black is due to plant matter becoming coalified. There appear to be circular divits in it (as opposed to diamomd shaped divots) which tells me this is a Stigmaria, the root morphogenus of Lepidodendron. This is an extinct club moss tree root. Carrie Jolene replied 2 years, 10 months ago Thank you!!