This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Description of the coal flora of the Carboniferous formation in Pennsylvania and throughout the United States Plate LXVIII . olTlos rcss il Flor nflLS Plate LXVIT Plate LXVIII Illustration biodiversitylibrary org Geological Survey of Pennsylvania Lesquereux Leo Pennsylvania Biodiversity Heritage Library Information field