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:
PisolitesConococheagueUpperCambrian. en Pisolites from the Conococheague Limestone Upper Cambrian of eastern Pennsylvania naturally eroded surface own Wilson Photograph taken by Mark Wilson Department of Geology The College of Wooster wooster edu html Pisolite Sedimentary rocks Carbonates Geology of Pennsylvania Cambrian life