Drilling with a very large corer

Last week the time had come. After the originally planned drilling date in March had to be postponed for corona-related reasons, a new opportunity was found during the excavation campaign in the "Relicts in the Moor" project in September. The aim was to explore the particularly deep subsoil in the north of the investigation area. In these areas north of the Großer and Kleiner Ahlen, we were able to determine a former coast during the magnetic measurements. The company Royal Eijkelkamp Soil and Water from Giesbeek / Netherlands, a specialist provider of drilling technology, provided their vibration corer mounted on a caterpillar and a crew for this purpose. Due to the dry summer, the moor surface proved to be stable for the almost 12 t heavy drilling rig and 6 m of peat and clay could be drilled until the ice age sand was reached. The northern part of the area, the Emmelke Valley, is of particular interest for the investigations, as there was direct contact with the North Sea here at the time of Stone Age settlement. Thanks to the great drilling technology, geologists and botanists now have drill cores with a diameter of 10 cm at their disposal, in order to better understand the changes in the landscape at this former inlet.
Further information about the project and the excavation can also be found on our blog.