Sedimentological data of three sediment cores from a backfilled Weser paleo-meander near Rinteln, Lower Saxony (Germany)

We present sedimentological data from 3 sediment cores (RI 05, RI 12 and RI 13), which were obtained from a backfilled Weser paleo-meander near the town of Rinteln in Lower Saxony, Germany. The sediment cores were extracted during two field campaigns in April and August of 2023 using a petrol-driven Wacker hammer (BHF 30 S) with closed steel tubes equipped with PVC liners (5 cm diameter). In the Laboratory for Physical Geography of the Freie Universität Berlin the PVC liners were opened and extracted sediments were cleaned and documented. The presented sedimentological parameters include: raw data of elemental composition derived by a portable energy-dispersive X-ray fluorescence spectrometer (Thermo Scientific Niton XL3t, see Hoelzmann et al. 2017; https://doi.org/10.5194/gi-6-93-2017) and volume-specific magnetic susceptibility (frequency 0.46 kHz, with an MS2C core scanning sensor and an MS3 meter; Bartington Instruments), both measured on the split sediment cores. Raw measurements of grain size distributions were done using a Beckmann Coulter LS13320 with PIDS (six measurements per sample). Carbonates were dissolved using 17 % HCl and organic material was removed by applying 30 % H2O2 for several days in a 40 °C water bath. Prior to measuring, 0.5 g Na4P2O7 was added as an anti-coagulation agent, the samples were placed in an overhead shaker for 24 h and exposed to ultrasonic. Loss on Ignition was investigated following the procedure described by Dean (1974; https://doi.org/10.1306/74D729D2-2B21-11D7-8648000102C1865D) and calculated after Heiri et al. (2001; https://doi.org/10.1023/A:1008119611481). pH values and electric conductivity were determined on subsamples of 5 g in a solution of 12.5 ml bi-distilled water with the eco Testr pH2 and the HANNA DiST HI 98303. All subsamples were measured twice and the results averaged.