Stigmaria (fossil tree root) (lower Pottsville Group, Lower Pennsylvanian; Jackson North roadcut, Ohio, USA) 1

            Stigmaria fossil root from the Pennsylvanian of Ohio, USA.

Plants are multicellular, photosynthetic eucaryotes.  The oldest known land plant body fossils are Silurian in age.  Fossil root traces of land plants are known back in the Ordovician.  The Devonian was the key time interval during which land plants flourished and Earth experienced its first “greening” of the land.  The earliest land plants were small and simple and probably remained close to bodies of water.  By the Late Devonian, land plants had evolved large, tree-sized bodies and the first-ever forests appeared.

See here is Stigmaria, which is a form genus for the roots of large arborescent lycopods (= scale trees) common during the Pennsylvanian ("Age of Coal Swamps").  Stigmaria is distinctive in having a cylindrical shape (if not compressed and distorted) and numerous pits.

Classification: Plantae, Lycophyta, Lepidodendrales, Lepidodendraceae

Stratigraphy: sandstone above carbonaceous shale above the "Sharon" Conglomerate, lower Pottsville Group, Lower Pennsylvanian

Locality: Jackson North Outcrop - roadcut along the southwestern side of Rt. 35, immediately southeast of the Rt. 35-Lloyds Bridge Road intersection (the northwestern intersection - there are two of them), north of the town of Jackson, northwest-central Jackson County, southern Ohio, USA (39° 06’ 32.94” North latitude, 82° 40’ 39.99” West longitude)

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Taken on: March 10, 2018

Tags:

Stigmaria

fossil

root

roots

plant

plants

scale

tree

trees

Pennsylvanian

Lepidodendraceae

Lepidodendrales

Lycophyta

Jackson

County

Ohio

Pottsville

Group « less

Sets appears in: • Ohio Rocks, Minerals, Fossils • Jackson North Rt. 35 roadcut (Jackson County, Ohio, USA) more » • Stigmaria fossil roots (fossil scale tree) (Pennsylvanian) • Pottsville Group (Lower and Middle Pennsylvanian; eastern Ohio, USA) • Plant Fossils « less

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