Frond of Alethopteris, a seed "fern" from the Carboniferous Period, Pennsylvania Epoch, some 300 million years ago. The reddish color is caused by oxidation of iron carbonate. Collected in Schuylkill County, Pennsylvania. Specimen courtesy of Pennsylvania State Museum, Klose Coal Fossil Collection.
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Creative#:
TOP22085753
Source:
達志影像
Authorization Type:
RM
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須由TPG 完整授權
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N/A
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