Summary
In the Middle Eocene lignite bearing succession at Helmstedt, isopollen maps have been constructed from a thin, highly carbonaceous horizon in the interbed between two seams of the Wulfersdorf member. During mining progress this carbonaceous band could be traced in the mine high wall over an area of 2 km by 0.5 km and is considered to represent an isochronous horizon. 28 samples were collected and analyzed.
On the basis of the isopollen maps it is possible, to distinguish between allochthonous and autochthonous elements. Ultimately, by comparison of the maps individual plant associations and environmental conditions may be recognized. In case of the carbonaceous horizon of the Wulfersdorf seam group a coastal swamp succession can be traced from a mangrove fringe through a brackish marsh and a freshwater marsh to a mire forest. The distribution of mangrove elements likeRhizophora, Avicennia andNypa in this horizon clearly shows that the shoreline was to the northwest and advanced from there inland to the southeast. A fourth element,Psilodiporites iszkaszentgyoergyi, is restricted in distribution and closely associated with the other known mangrove types and therefore considered here to be a part of the mangrove fringe. Behind the mangrove zone, pollen of Restionaceae and Sparganiaceae as well as fern spores are more abundant than elsewhere in the Wulfersdorf seam section suggesting that a reed-like vegetation with fern and aquatic herbs developed here under rather wet conditions. A hammocky distribution of corresponding plants is indicated by the isopollen map of palms likeArecipites spp. and other elements. The main peat forming vegetation, however, was a mire forest dominated by Fagaceae alternating with a Betulaceae dominated forest including Myricaceae and Juglandaceae.
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References
Assemien, P. (1969): Pollens fossile de Rhizophora à Bougé (Basse Vallée du Sénégal).—Pollen et Spores,11/1, 73–81, ParisBechler, A. and Beug, H.-J. (1987): Isopollen maps for 18000 years B. P. of the Atlantic offshore of Northwest Africa: evidence for paleowind circulation.—Paleoceanography,2, 561–582, Washington
Blasco, F. (1977): Outlines of ecology, botany and forestry of the mangals of the Indian subcontinent—In: Chapman, V. J. (ed.): Ecosystems of the world.—Vol. 1: Wet coastal ecosystems, 241–260, Amsterdam
Boulter, M.C. and Hubbard, R.N.L.B. (1982): Objective paleoecological and biostratigraphic interpretation of Tertiary palynological data by multivariate statistical analysis. Palynology,6, 55–68, Austin
Bullwinkel, V. (1996): Fazies und Sedimentologie der Begleitder Wulfersdorfer Flözgruppe (Mittel-Eozän, Tagebau Helmstedt), Oberes Zwischenmittel und Hangendes.—Unpubl. Dipl.-Arb., Univ. Göttingen 106 p., Göttingen
Cavagnetto, C. and Anadón, P. (1995): Une mangrove complexe dans le Bartonien du bassin de le l'Ebre (Ne de l'Espagne).— Palaeontographica, Abt. B,236, 147–165, Stuttgart.
Daubenmire, R., (1978): Plant geography, with special reference to North America.—1–338. New York (Academic Press)
Dupont, L. M. and Hooghiemstra, H. (1989): The Saharan-Sahelian boundary during the Brunhes chron.—Acta Bot. Neerl.,38/4, 405–415, Oxford (Blackwell)
Frederiksen, N. O. (1985): Review of Early Tertiary Sporomorph Palaeoecology.—Am. Ass. Stratigr. Palynol., Contrib. Ser,15, 1–92, Dallas
Frederiksen, N. O., Wiggins, V. D., Ferguson, I. K., Dransfield, J. and Ager, C. M. (1985): Distribution, paleoecology, paleoclimatology, and botanical affinity of the eocene pollen genusDiporoconia n. gen.—Palynology,9, 37–60, Austin.
Gauch, H. G. (1982): Multivariate analysis in community ecology. —Seiten fehlen. New York (Cambr. Univ. Press)
Gebka, M., Mosbrugger, V., Schilling, H.-D. and Utescher, T. (1999): Regional-scale palaeoclimate modelling on soft proxy-data basis—an example from the Upper Miocene of the Lower Rhine Embayment.—Palaeogeography, Palaeoclimatology, Palaeoecology,152, 3–4, 225–258, Amsterdam
Hammer-Schiemann, G. (1998): Palynologische Untersuchungen zur Fazies und Ökologie der Unterflözgruppe im Tagebau Schöningen (Untereozän, Helmstedt, Bez. Braunschweig).— Unpubl. Thesis, Univ. Göttingen, 146 p., Göttingen
Haseldonckx, P. (1972): The presence ofNypa palms in Europe: A solved problem.—Geologie en Mijnbow,51, 645–650, Leiden.
Heywood, V. H. (1982): Blütenpflanzen der Welt—####
Huntley, B. and Birks, H. J. B. (1983): An atlas of past and present pollen maps for Europe: 0–13.000 years ago.—667 p., Cambridge (Cambridge Univ. Press)
Krutzsch, W., Blumenstengel, H., Kiesel, Y. and Rüffle, L. (1992): Paläobotanische Klimagliederung des Alttertiärs (Mitteleozän bis Oberoligozän) in Mitteldeutschland und das Problem der Verknüpfung mariner und kontinentaler Gliederungen (klassische Biostratigraphie—paläobotanisch-ökologische Klimastratigraphie—Evolutionsstratigraphie der Vertebraten). —N. Jb. Geol. Paläont., Abh.,186, H. 1/2, 137–253, Stuttgart.
Lenz, O. K. (2000): Paläoökologie eines Küstenmoores aus dem Eozän Mitteleuropas am Beispiel der Wulfersdorfer Flöze und deren Begleitschichten (Helmstedter Oberflözgruppe, Tagebau Helmstedt).—Doctoral diss., Univ. Göttingen, 228 p., Göttingen Published: http://webdoc.sub.gwdg.de/diss/2000/lenz/index.htm
Lietzow, A., Paul, J., Ritzkowski, S and Schmidt, B. (1990): Marine Ingressionen in der eozänen Halle-Helmstedter Bucht als Anzeiger für Meeresspiegelschwankungen.—Nachr. dt. geol. Gesell.,43, 138–139, Hannover.
Lietzow, A. (1991): Das Paläogen des Tagebaus Schöningen, Baufeld Esbeck bei Helmstedt (östliches Niedersachsen).—Unpubl. Dipl.-Arb., Univ. Göttingen, 104 p., Göttingen.
Look, E. R. (1984): Geologie und Bergbau im Braunschweiger Land.—Ber. naturhist. Gesell. Hannover,127:1–467, Hannover.
Mai, H. D. (1995): Tertiäre Vegetationsgeschichte Europas.— 691 p., Jena, Stuttgart.
Manger, G. (1952): Der Zusammenhang von Salztektonik und Braunkohlenbildung bei der Entstehung der Helmstedter Braunkohlenlagerstätten.—Mitt. Geol. Staatsinst. Hamburg,21, 7–45, Hamburg.
Mosbrugger, V (1995): New methods and approaches in Tertiary palaeoenvironmental research.—Abh. Staatl. Mus. f. Min. u. Geol. Dresden,41, 41–52, Dresden
Muller, J. (1959): Palynology of Recent Orinoco Delta and shelf sediments.—Micropaleontolgy,5, 1–32, New York.
Muller, J. and Caratini, C. (1977): Pollen ofRhizophora as a guide fossil.—Pollen et Spores,19, 361–389, Paris
Pflug, H. (1952): Palynologie und Stratigraphie der Braunkohlen von Helmstedt.—Paläont. Zeitschr.,26, 112–137, Stuttgart.
Pflug, H. (1986): Palyno-Stratigraphie des Eozän/Oligozän im Raum von Helmstedt, in Nordhessen und im südlichen Anschlußbereich.—In: Tobien, H. (ed.): Nordwestdeutschland im Tertiär. —Beitr. z. Reg. Geol. Erde,18, 576–582, Berlin, Stuttgart.
Platt, W.J., Schwartz, M. W. (1992): Temperate hardwood forests. —In: Myers, R.L. and Ewel, J.J. (eds.): Ecosystems of Florida, 194–229, Orlando (University of Central Florida Press)
Ralska-Jasiewiczowa, M. (1983): Isopollen maps for Poland: 0–1000 years B.P..—New Phytol.,94, 133–175, Oxford
Richards, P. W. (1996): The tropical rain forest. An ecological study.—2nd ed., 1–575, Cambridge (University Press)
Riegel, W. (1965): Palynology of environments of peat formation in southwestern Florida.—Diss. Pennsylvania State Univ., 189 p., State Park.
Riegel, W., Bode, T., Hammer, J., Hammer-Schiemann, G., Lenz, O. K. and Wilde, V. (1999): The palaeoecology of the Lower and Middle Eocene at Helmstedt, northern Germany—A study in contrasts.—Acta Palaeobot. Suppl. 2, 349–358, Proceedings 5th EPPC, Cracow
Steenis, C. G. G. J. van (1962): The land-bridge theory in botany. —Blumea,11/2, 237–372, Leiden.
Thomson, P. W. (1950): Grundsätzliches zur tertiären Pollen-und Sporenmikrostratigraphie auf Grund der Untersuchung des Hauptflözes der rheinischen Braunkohle in Liblar, Neurath, Fortuna und Brühl.—Geol. Jb.,65, 113–126, Hannover
Walther, H. and Zetter, R. (1993): Zur Entwicklung der paläogenen Fagaceen Mitteleuropas.—Palaeontographica, Abt. B,230, 183–194, Stuttgart.
Wilkening, W. and Adler, R. E. (1981): Exkursion B11: Montangeologie des Braunkohlentagebaus Helmstedt.—133. Hauptversammlung d. Deutschen Geol. Ges., Clausthal 1981, 155–171, Clausthal
Willard, D. A., Weimer, L. M. and Riegel, W. L. (2001): Pollen assemblages as paleoenvironmental proxies in the Florida Everglades.—Rev. Palaeobot. Palynol.,113, 213–235, Amsterdam.
Ziegler, P. A. (1990): Geological atlas of western and central Europe.—Shell Internationale Petroleum Maatschapping B. V., 239 p., Den Haag
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Lenz, O.K., Riegel, W. Isopollen maps as a tool for the reconstruction of a coastal swamp from the Middle Eocene at Helmstedt (Northern Germany). Facies 45, 177–194 (2001). https://doi.org/10.1007/BF02668111
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DOI: https://doi.org/10.1007/BF02668111