Cover artwork. Figure 6 from  Extraction of Calcareous Macrofossils from the Upper Cretaceous White Chalk and Other Sedimentary Carbonates in Denmark and Sweden: The Acid-Hot Water Method and the Waterblasting Technique by Jan Kresten Nielsen and Sten Lennart Jakobsen. The successive stages of preparation of medium-scale waterblasting and needle preparation of a regular echinoid, Stereocidaris sp., from the Middle Danian Bryozoan Limestone (Tylocidaris abildgaardi Biozone) at Kulsti Rende, Stevns Klint. GM 2004.921.