Environmental change and fluvial activity during the Younger Dryas in central Germany

Andres, Wolfgang; Bos, J.A.A.; Houben, Peter; Kalis, Arie J.; Nolte, Sabine; Rittweger, Holger; Wunderlich, Jürgen

doi:10.1016/s1040-6182(00)00125-7

Cited by 58 publications

(34 citation statements)

References 17 publications

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“…In the northern Upper Rhine Graben, these were apparently too insignificant to cause geomorphic adjustment. Clearly developed meandering Allerød and/or braided Younger Dryas terrace levels are described for areas farther downstream along the River Rhine (Pons, 1957;Klostermann, 1992;Berendsen et al, 1995;Schirmer, 1995;Törnqvist, 1998;Berendsen and Stouthamer, 2001), in tributaries of the River Rhine (e.g., Andres et al, 2001), and in many other European River systems (e.g., Brown et al, 1994;Huisink, 1997;Starkel, 2002;Gao et al, 2007). In contrast, the northern Upper Rhine Graben is characterised by terraces that developed under transitional conditions from braided to meandering, which are poorly preserved.…”

Section: Nonpreservation Of Allerød And/or Younger Dryas Terrace Levelsmentioning

confidence: 99%

“…Indeed, the persistent presence of pine forest cover over the southern half of the Rhine catchment throughout the Younger Dryas (Dambeck and Bos, 2002;Bos et al, 2008) is in contrast to the downstream, northerly parts that are almost completely deforested (e.g., Rheinische Schiefergebirge; Litt and Stebich, 1999). Andres et al (2001) pointed out that only the highest elevated (N400 m above MSL) tributary valleys in the southern half of the Rhine catchment were deforest during the Younger Dryas but that, nevertheless, the upper and lower courses of the valleys showed a transition to a braided system. Apparently, the larger trunk River Rhine is much more buffered to these climatic changes.…”

Section: Nonpreservation Of Allerød And/or Younger Dryas Terrace Levelsmentioning

confidence: 99%

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Fluvial terrace formation in the northern Upper Rhine Graben during the last 20000 years as a result of allogenic controls and autogenic evolution

et al. 2009

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a b s t r a c t a r t i c l e i n f oThe northern Upper Rhine Graben hosts a well-preserved Late Weichselian and Holocene fluvial terrace sequence. Terraces differ in elevation, morphology, and overbank sediment characteristics. The purpose of this study was to determine the relative importance of allogenic controlling factors versus autogenic evolution on the successive formation of these terraces. For a representative valley segment (the Gernsheim region), results from previous research were integrated with newly obtained borehole data and digitized elevation maps to construct palaeogeographic maps and cross sections. Coarse-grained channel deposits below terrace surfaces were dated using Optically Stimulated Luminescence, and fine-grained abandoned channel fill deposits were dated using pollen stratigraphy and radiocarbon analysis. Initiation of terrace formation was caused by climatic change in the Late Pleniglacial (after~20 ka), but fluvial response was complex and slow and continued locally until the middle Boreal (~9 ka). Early to Middle Holocene (~6 ka) changes in fluvial style and associated overbank lithofacies are not necessarily controlled by climatic change as was previously proposed. Instead, autogenic processes combined with river reach-specific factors explain the observed terrace development. Continuous incision, autogenic evolution, and high preservation potential provide an alternative explanation for the presence of a terrace sequence in this subsiding area.

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Section: Nonpreservation Of Allerød And/or Younger Dryas Terrace Levelsmentioning

confidence: 99%

Section: Nonpreservation Of Allerød And/or Younger Dryas Terrace Levelsmentioning

confidence: 99%

Fluvial terrace formation in the northern Upper Rhine Graben during the last 20000 years as a result of allogenic controls and autogenic evolution

et al. 2009

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“…M. ackel and Friedmann 1999;Niller, 1998;Bubenzer, 2000;Schulte and Stumb . ock, 2000;Andres et al, 2001;M. ausbacher et al, 2001).…”

Section: Floodplain Depositsunclassified

Environmental changes during the Holocene climatic optimum in central Europe - human impact and natural causes

Kalis¹,

Merkt²,

Wunderlich³

2003

Quaternary Science Reviews

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328

228

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The priority programme ''Changes of the Geo-Biosphere'' aimed to reconstruct the environmental history of central Europe with emphasis on the time interval from 9000 to 5500 cal BP (time-slice II), coinciding with the Holocene climatic optimum. During this period, the onset of human activities such as settlement, agriculture and animal husbandry caused environmental changes. Studies of different landscape units in Germany were carried out to identify these anthropogenically induced changes and to distinguish them from natural effects on the environmental system. The investigated archives included laminated lake sediments, fluvial sediments, colluvia and soils, speleothems, peat and coastal sediments. The different archives were examined using refined research methods including a variety of sedimentary and geochemical analyses, together with pollen analysis and dating methods for the establishment of a reliable chronology. The results of the various research groups are summarised and critically discussed. Based on these results, the climatic optimum can be subdivided into three periods: (1) the Early Atlantic from 9000 to 7500 cal BP with negligible human impact and stable environmental conditions; (2) the Late Atlantic during Early and Middle Neolithic from 7500 to 6300 cal BP with pollen evidence for vegetation changes but only negligible changes detectable in other proxy records; and (3) the Late Atlantic during the Younger Neolithic (Jungneolithikum), after 6300 cal BP, with human impact observed in many archives and proxy records especially in the pollen record but also in lacustrine and fluvial sediments. During the whole climatic optimum natural causes, such as minor shifts of temperature, did not induce substantial environmental changes, though some changes, such as temporary droughts, may have facilitated and amplified the observed human impact. r

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“…Records of Chenopodiaceae and Seseli, indicative for disturbed soils, point in the same direction. Moreover, during the early Younger Dryas the Bergstrassen-Neckar channel near Wasserbiblos was still active, but abandonment of this channel followed during a phase with less fluvial dynamics, at the (Urz, 1995;Bos, 1998;Nolte, 2000;Andres et al, 2001;Bos & Urz, 2003). It is suggested that dune formation and reworking of older dune sands in the northern Upper Rhine Graben occurred during the second part of the Younger Dryas (Löscher, 1988;Löscher & Haag, 1989;Dambeck & Thiemeyer, 2002;Dambeck & Bos, 2002) (Figs.…”

Section: Younger Dryasmentioning

confidence: 99%

Palaeoenvironmental changes and vegetation history of the northern Upper Rhine Graben (southwestern Germany) since the Lateglacial

Bos

Dambeck

Kalis

et al. 2008

Netherlands Journal of Geosciences

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The vegetation of the northern Upper Rhine Graben (southwestern Germany) is reconstructed for the end of the Lateglacial and the Holocene by means of palynological analyses in combination with AMS 14c dating. Analogous to adjacent lowland areas, the Younger Dryas climatic deterioration did not result in a complete deforestation of the area and open pine woodlands with locally birch stands and shrubs persisted. A subdivision of the Younger Dryas period, into a humid first phase, followed by a dry second phase was also reflected in our records. For the Holocene, the pollen diagrams show two regionally different vegetation developments, related to substrate and variations in annual precipitation: in the south the ‘classical’ succession of pine then hazel is followed by other deciduous trees, whereas in the northern part, pine kept its dominance far into the Subboreal.

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Environmental change and fluvial activity during the Younger Dryas in central Germany

Cited by 58 publications

References 17 publications

Fluvial terrace formation in the northern Upper Rhine Graben during the last 20000 years as a result of allogenic controls and autogenic evolution

Fluvial terrace formation in the northern Upper Rhine Graben during the last 20000 years as a result of allogenic controls and autogenic evolution

Environmental changes during the Holocene climatic optimum in central Europe - human impact and natural causes

Palaeoenvironmental changes and vegetation history of the northern Upper Rhine Graben (southwestern Germany) since the Lateglacial

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