Moshayedi, Maryam (2023)
Climate and vegetation dynamics of Central Europe during the Eocene greenhouse: Palynological investigations of lacustrine sediments from the Sprendlinger Horst (Hesse, Southwest Germany).
Technische Universität Darmstadt
doi: 10.26083/tuprints-00023642
Dissertation, Erstveröffentlichung, Verlagsversion
Kurzbeschreibung (Abstract)
Palynomorph assemblages of four small Eocene lakes at Messel, Prinz von Hessen, Offenthal and Groß Zimmern on the Spendlinger Horst in Southwest Germany were studied for understanding the evolution of the vegetation in Southwest Germany during Paleogene greenhouse conditions with respect to regional tectonic and volcanic influence. Except for Prinz von Hessen, which is most probably a small pull-apart basin, the other basins are maar lakes and formed as a consequence of phreathomagmatic eruptions. Based on revised 40Ar/39Ar dates the eruptions at Offenthal (47.71/47.87 ± 0.3 Ma) and Messel (48.11/48.27 ± 0.22 Ma) are nearly of the same age around the lower/middle Eocene boundary. Palynostratigraphic analyses indicate a lower Eocene age for the studied part of Prinz von Hessen and a Middle Eocene age for Groß Zimmern. Our quantitative palynological studies revealed different pollen and spore assemblages in each basin, but similar general trends in the evolution of the vegetation. The plant succession at the maar lakes started with the progressive recolonization of the area in the vicinity of the craters by pioneering elements such as ferns or Restionaceae and continued into a paratropical rainforest and, finally, a climax vegetation with a dominance of juglandaceous and fagaceous plants. Nevertheless, each basin has its unique story to tell. In Messel the following undisturbed record of about 600.000 years reveals the influence of orbital forcing on the climate and the composition as well as on the diversity of the climax vegetation during the early middle Eocene. A climax vegetation comparable to Messel is not documented at Offenthal mainly due to a significant shorter time period reflected in the respective succession of lake sediments. At Lakes Prinz von Hessen and Groß Zimmern regional tectonic activity had a much higher influence on the paleoenvironment than orbitally controlled climate change.
Typ des Eintrags: | Dissertation | ||||
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Erschienen: | 2023 | ||||
Autor(en): | Moshayedi, Maryam | ||||
Art des Eintrags: | Erstveröffentlichung | ||||
Titel: | Climate and vegetation dynamics of Central Europe during the Eocene greenhouse: Palynological investigations of lacustrine sediments from the Sprendlinger Horst (Hesse, Southwest Germany) | ||||
Sprache: | Englisch | ||||
Referenten: | Lenz, PD. Dr. Olaf Klaus ; Schüth, Prof. Dr. Christoph | ||||
Publikationsjahr: | 2023 | ||||
Ort: | Darmstadt | ||||
Kollation: | XII, 157 Seiten | ||||
Datum der mündlichen Prüfung: | 12 Juli 2022 | ||||
DOI: | 10.26083/tuprints-00023642 | ||||
URL / URN: | https://tuprints.ulb.tu-darmstadt.de/23642 | ||||
Kurzbeschreibung (Abstract): | Palynomorph assemblages of four small Eocene lakes at Messel, Prinz von Hessen, Offenthal and Groß Zimmern on the Spendlinger Horst in Southwest Germany were studied for understanding the evolution of the vegetation in Southwest Germany during Paleogene greenhouse conditions with respect to regional tectonic and volcanic influence. Except for Prinz von Hessen, which is most probably a small pull-apart basin, the other basins are maar lakes and formed as a consequence of phreathomagmatic eruptions. Based on revised 40Ar/39Ar dates the eruptions at Offenthal (47.71/47.87 ± 0.3 Ma) and Messel (48.11/48.27 ± 0.22 Ma) are nearly of the same age around the lower/middle Eocene boundary. Palynostratigraphic analyses indicate a lower Eocene age for the studied part of Prinz von Hessen and a Middle Eocene age for Groß Zimmern. Our quantitative palynological studies revealed different pollen and spore assemblages in each basin, but similar general trends in the evolution of the vegetation. The plant succession at the maar lakes started with the progressive recolonization of the area in the vicinity of the craters by pioneering elements such as ferns or Restionaceae and continued into a paratropical rainforest and, finally, a climax vegetation with a dominance of juglandaceous and fagaceous plants. Nevertheless, each basin has its unique story to tell. In Messel the following undisturbed record of about 600.000 years reveals the influence of orbital forcing on the climate and the composition as well as on the diversity of the climax vegetation during the early middle Eocene. A climax vegetation comparable to Messel is not documented at Offenthal mainly due to a significant shorter time period reflected in the respective succession of lake sediments. At Lakes Prinz von Hessen and Groß Zimmern regional tectonic activity had a much higher influence on the paleoenvironment than orbitally controlled climate change. |
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Status: | Verlagsversion | ||||
URN: | urn:nbn:de:tuda-tuprints-236422 | ||||
Sachgruppe der Dewey Dezimalklassifikatin (DDC): | 500 Naturwissenschaften und Mathematik > 560 Paläontologie | ||||
Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften 11 Fachbereich Material- und Geowissenschaften > Geowissenschaften > Fachgebiet Angewandte Sedimentgeologie |
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Hinterlegungsdatum: | 05 Apr 2023 12:04 | ||||
Letzte Änderung: | 06 Apr 2023 06:09 | ||||
PPN: | |||||
Referenten: | Lenz, PD. Dr. Olaf Klaus ; Schüth, Prof. Dr. Christoph | ||||
Datum der mündlichen Prüfung / Verteidigung / mdl. Prüfung: | 12 Juli 2022 | ||||
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