Fossil Horsetail Leaves

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Photo credit: © Science History Images / Alamy / Afripics
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Keywords: america, asterophyllites, calamitaceae, carboniferous, concretion, creek, equisetales, equisetopsida, era, extinct, flora, fossil, fossilized, horsetail, illinois, ironstone, late, leaf, leaves, longifolius, mazon, nodule, north, paleontology, paleozoic, pennsylvanian, period, plant, prehistoric, pteridophyta, siderite, sphenophyte, sphenopsida