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:
Syringosphaeridae. en Syringosphaeridae Karakoram stones Fossils The body of Syringosphaeria tuberculata Duncan Natural size portion magnified showing the tabulation on the surface of the body and monticules and few pores The body of Syringosphaeria porosa Duncan shown in outline with portion indicating the numerous pores Natural