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:
EchinosphaeritesCements. The Ordovician cystoid Echinosphaerites filled with early calcite cements own en Mark Wilson Department of Geology The College of Wooster wooster edu html Wilson original upload log page en EchinosphaeritesCements Wilson bytes no taken by Mark Wilson Department of Geology The College of Wooster