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Chironomid assemblages and inferred summer temperature, late Rissian, Eemian and earliest Würmian, S Germany

Citation

Bolland, Alex et al. (2021), Chironomid assemblages and inferred summer temperature, late Rissian, Eemian and earliest Würmian, S Germany, Dryad, Dataset, https://doi.org/10.5061/dryad.8cz8w9gpt

Abstract

The data herein presents a new chironomid record and associated chironomid-based temperature reconstruction covering the mid Eemian to the end of the first Würmian stadial (ca. 125–105 ka), augmented by results for the late Rissian glaciation and the early Brörup interstadial from the Füramoos palaeolake, southern Germany. There is an unconformity in the sediment core analysed between the late Rissian sediments and the mid Eemian sediments. These data also include non-chironomid invertebrate remains, including Ceratopogonidae, Daphnia and Ephemeroptera as well as Characean oospores.

Methods

Sample processing: Sediment samples were soaked in room temeprature 10% KOH solution for 6 hours before being sieved through 100 and 200 micrometer sieves. Chironomids were picked from those samples using a Bogorov tray under a stereomicroscope (30 – 50 x magnification). Samples were dried and then mounted on microscope slides using Euparal and identified under at 40 – 400 x magnification  with a composund microscope. The full laboratory methods are presented in the associated manuscript.

For post identification data processing and temperature reconstruction analysis please see the associated publication in Boreas: https://doi.org/10.1111/bor.12567.

Usage Notes

There is an unconformity in the sediment core between the late Rissian sediments and the mid Eemian sediments. Therefore neither the assemblage record nor temperature reconstruction are continuous across this section. Do not use them as such.

Funding

Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung, Award: 200021_165494