trilobite fossile imprint drawing silhouette in stone dust, ash, dirt as archeolog, history, geology, paleontology, evolution, ex

abstract ancient animal archeology arthropod ash background beetle bone bug concept conceptual creative crustacean dead death drawing evolution extinct fauna fossil geology graphic grey history idea illustration image imprint marine nature object ocean old original paleontology part prehistoric sand sea shell sign silhouette skeleton stone symbol trilobite unique vestige wild