Greater North Sea
Geological Time: Quaternary Holocene recent
the images are made by Dieter Ketelsen and the raw material is provided by
The identification is based upon:
, : Ehrenberg, C.G. (1854). Mikrogeologie. Das Erden und Felsen schaffende Wirken des unsichtbar kleinen selbstständigen Lebens auf der Erde. [Texte]. Leopold Voss, Leipzig., xxviii + 374 pp. Plate , Fig.