Fern fossil - stock photo
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Fern fossil

Fern fossil imprint in shale juxtaposed with modern day fern fronds. The distinctive white outline on black shale is caused by aluminum silicate (also known as pyrophyllite) and is characteristic of fern fossils found in coal mines in the St Clair, Pennsylvania area. The fossils are from the Pennsylvanian Epoch of the Carboniferous Period, 300 million years ago.

Credit
Science Source / Martin Shields

Dimensions
5019 x 3360 pixels

Print Size @ 300 dpi
17 x 11 inches / 42 x 28 cm

Releases
Model No you may not need it
Property No you may not need it
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