The northeast flank of the saddle structure is exposed at Heeseberg, the southwest flank is hidden under tertiary and quaternary deposits. The saddle structure was formed during the Jurassic and Cretaceous periods around 140 million years ago, when the Zechstein salts deposited in the subsoil rose into weak zones in the overburden and bulged the layers above. This also lifted up the deposits of the Bunter Sandstone period, which were formed around 250 million years ago. They can be seen today in some abandoned quarries at Hesseberg. The outcrops at Heeseberg impressively show the roe stones from the upper part of the Bernburg Formation, which belongs to the Lower Bunter Sandstone and in which there are many "cauliflower-like" looking stromatolites. The German Geological Society - Geological Association eV - DGGV is one of the oldest scientific organizations in Germany. On the occasion of the 175th anniversary of the German Geological Society and its successor organizations in 2023, we have initiated the 30 Geotope³ project. The 30 Geotope³ project aims to document the most visually appealing and scientifically significant outcrops in Germany. The focus is on digital and three-dimensional recording. The outcrops are georeferenced using cameras (including drones and 360-degree cameras), laser scanners and d-GPS. The individual locations have been presented monthly since February 2021 on the project website https://www.digitalgeology.de All data recorded as part of the project will be made freely available. The project involves many geoscientific institutions, such as geoparks, state geological offices and universities, and is therefore cross-site. _______________________________________________________________________________________________ Stromatolites overview https://www.britannica.com/science/st... Stromatolites close-up https://newsroom.unsw.edu.au/news/sci... Stromatolite Section https://www.lpi.usra.edu/education/EP... Rogen Photo: F. Schlichting https://www.blinker.de/angelmethoden/... Ooide Thin Section Burne, RV, Eade, JC, & Paul, J. (2012). The Natural History of Ooliths: Franz Ernst Brückmann's treatise of 1721 and its significance for the understanding of oolites. Hallesches Jahrbuch für Geowissenschaften, 34, 93-114. Geopath: https://geopark-hblo.de/standorte/geo... View of the institute Photo: Jan-Peter Kasper (University of Jena) https://www.igw.uni-jena.de/geschichte Uni Dresden building 1926 https://tu-dresden.de/bu/bauingenieur... Miscellany Geoscience Library Dresden https://www.senckenberg.de/de/institu... Hauschke, N., Lange, JM, Erler, D., Mertmann, D., & Röhling, HG (2012). Ernst Kalkowsky (1851-1938) - Portrait of an important geoscientist and researcher of "Oolith and Stromatolite in the North German Buntsandstein". Geohist. Blätter, 22, 1-27. Paul, J., Peryt, TM, & Burne, RV (2011). Kalkowsky's stromatolites and oolites (Lower Buntsandstein, Northern Germany). In Advances in stromatolite Geobiology (pp. 13-28). Springer, Berlin, Heidelberg. Images of Kalkowsky State Natural History Collections Dresden, Museum of Mineralogy and Geology, Archive German Photo Library Music https://uppbeat.io/t/ben-johnson/the-... https://uppbeat.io/t/andrey-rossi/bri... https://uppbeat.io/t/andrey-rossi/hey...