The timing of glacier advances in the northern European Alps based on surface exposure dating with cosmogenic &lt;sup&gt;10&lt;/sup&gt;Be, &lt;sup&gt;26&lt;/sup&gt;Al, &lt;sup&gt;36&lt;/sup&gt;Cl, and &lt;sup&gt;21&lt;/sup&gt;Ne

Ivy‐Ochs, Susan; Kerschner, Hanns; Reuther, Anne U.; Maisch, Max; Sailer, Rudolf; Schaefer, Joerg M.; Kubik, Peter W.; Synal, Hans-Arno; Schlüchter, Christian

doi:10.1130/2006.2415(04)

Cited by 87 publications

(164 citation statements)

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“…The age of Ivrea 6 is in excellent agreement with the exposure ages from erratics from the outermost LGM moraines at Wangen (Solothurn, Switzerland) on the northern Swiss Alpine foreland. The data from Wangen indicate that the initial moraine abandonment was underway by 22.1-19.5 ka based on 10 Be (Ivy- Ochs et al, 2006b). Good correlation can be found also with the Remanzacco subsynthem recessional moraines in the Tagliamento Amphiteatre in eastern Italian Alps, dated between 21 and 18.8 cal ka 14 C (Monegato et al, 2007).…”

Section: Discussionmentioning

confidence: 59%

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New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

Gianotti

Forno

Ivy‐Ochs

et al. 2008

Quaternary International

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The Ivrea amphitheatre (IA) in NW Italy has been studied since 1850, on pedostratigraphic and morphological bases. Three stratigraphic groups of glacial sediments were distinguished. Newly recognized stratigraphic boundaries are based on interstadial/ interglacial units, palaeosols and lacustrine organic layers interbedded with glacigenic deposits, and on pedostratigraphy. Mapping of morphological features and associated marginal and sub-glacial deposit facies was used to characterize and reconstruct glacial margin fluctuations. Based on the field evidence, the stratigraphical limits recognized at single sites can be interpolated over the whole amphitheatre. Ten stratigraphic units (referred to as alloformations: Afs) were distinguished and mapped. They are related to at least as many glacial episodes ranging in age from the end of the Early Pleistocene to the Late Pleistocene. The youngest three glacial units (Serra Af, Piverone Af and Ivrea Af) and one interstadial level (Alice Superiore Unit between Serra and Piverone Afs) are discussed in detail. Based on biostratigraphical and pedological, as well as sedimentological and morphological data, the Serra Af can be attributed to MIS 6 and Piverone Af to MIS 4. The 10 Be surface exposure ages from two boulders (27.973.1, 32.474.0 kyr) on the Serra d'Ivrea moraine provide only a minimum age for moraine construction. The alignment of typical ice marginal landforms (moraines and kame terraces) for the more recent unit (Ivrea Af) has allowed recognition of 12 principal stadials during the LGM and Lateglacial; 6 stadials in the amphitheatre and 6 stadials in Dora Baltea Valley, and reconstruction of the nature of the last glacial retreat from the amphitheatre to the cirques. 10 Be exposure ages from three boulders related to Ivrea Af are 13.171.0, 17.472.6 and 20.871.5 ka. The latter two ages indicate that the Dora Baltea Glacier deposited the Ivrea Af in the IA during MIS 2. The 10 Be exposure ages of 14.671.2 and 14.070.9 ka from a polished bedrock surface some 15 km upstream from the amphitheatre provide a minimum age for ice decay. r

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Section: Discussionmentioning

confidence: 59%

“…Shielding corrections followed Dunne et al (1999). Except for Donnas 1 and 2 (Ivrea 10 and 11) which come from a glacially polished surface, exposure ages have also been calculated with a correction for rock surface weathering at a rate of 3 mm ka À1 (Table 1) (Ivy-Ochs et al, 2006b). Age uncertainties reflect only analytical errors.…”

Section: Methodsmentioning

confidence: 99%

New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

Gianotti

Forno

Ivy‐Ochs

et al. 2008

Quaternary International

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“…For the two larger boulders, we obtained apparent exposure ages of 9973 ka ( 10 Be) and 112711 ka ( 21 Ne) for MO-04-01 and 10776 ka ( 10 Be) and 123712 ka ( 21 Ne) for MO-04-04. We reproduce the same age as IvyOchs obtained on a different sample of boulder MO-04-01 at the ETH/PSI laboratory (Ivy- Ochs et al, 2006b As the boulders are all of the same lithology on a quite narrow location, we do not expect them to have been deposited by different glacial advances. However, a purely .…”

Section: Resultsmentioning

confidence: 73%

First results of cosmogenic dated pre-Last Glaciation erratics from the Montoz area, Jura Mountains, Switzerland

Graf

Strasky

Ivy‐Ochs

et al. 2007

Quaternary International

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The Jura Mountains are a perialpine chain bending from the SW to the NW of Switzerland. Alpine ice reached only marginal areas of this chain during the Last Glacial Maximum (LGM) but remaining erratic boulders of alpine origin indicate older glaciations of unknown age, tentatively correlated either with the classical Rissian or with the Most Extensive Glaciation. Presented here are the first results of dating these pre-LGM boulders by using cosmogenic radionuclides ( 10 Be) and noble gases ( 21 Ne). Both data sets are in good agreement within 1s error, with radionuclide apparent exposure ages ranging from 60 to 107 ka, and noble gas apparent ages from 73 to 123 ka. Considering the importance of erosion on older boulders, the age of the erratics corresponds most probably to Marine Isotope Stage 6. These results are encouraging for further studies on pre-LGM erratic boulders in the mid-latitudes.

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“…Holzhauser 1984;Hormes et al 2001;Holzhauser et al 2005;Joerin et al 2006Joerin et al , 2008. While the general sequence and the related morphostratigraphic positions of the various stadials are quite widely accepted, reliable dating exist only for a few of them (Heitz et al 1982;Maisch 1987;Schlüchter 1988;Kerschner et al 1999;Ivy-Ochs et al 2006a,b, 2007. This lack of direct dating reflects the various limitations of the applied dating methods and the rareness of optimal sampling sites (representative of the investigated site).…”

Section: Introductionmentioning

confidence: 99%

“…Krayss 1987, 2005;Schlüchter 1988Schlüchter , 2004, on the Lateglacial ice decay (e.g. Maisch 1981Maisch , 1987Schoeneich 1999;Kerschner et al 1999;Ivy-Ochs et al 2004, 2006a,b, 2007, and also in detail on Holocene glacier fluctuations in the Alps (e.g. Holzhauser 1984;Hormes et al 2001;Holzhauser et al 2005;Joerin et al 2006Joerin et al , 2008.…”

Section: Introductionmentioning

confidence: 99%

Combination of Numerical Dating Techniques Using¹⁰Be in Rock Boulders and¹⁴C of Resilient Soil Organic Matter for Reconstructing the Chronology of Glacial and Periglacial Processes in a High Alpine Catchment during the Late Pleistocene and Early Holocene

et al. 2009

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ABSTRACT. Glacier fluctuations and paleoclimatic oscillations during the Late Quaternary in Val di Rabbi (Trentino, northern Italy) were reconstructed using a combination of absolute dating techniques ( 14 C and 10 Be) and soil chemical characterization. Extraction and dating of the stable fraction of soil organic matter (SOM) gave valuable information about the minimum age of soil formation and contributed to the deciphering of geomorphic surface dynamics. The comparison of 10 Be surface exposure dating (SED) of rock surfaces with the 14 C ages of resilient (resistant to H 2 O 2 oxidation) soil organic matter gave a fairly good agreement, but with some questionable aspects. It is concluded that, applied with adequate carefulness, dating of SOM with 14 C might be a useful tool in reconstructing landscape history in high Alpine areas with siliceous parent material. The combination of 14 C dating of SOM with SED with cosmogenic 10 Be (on moraines and erratic boulders) indicated that deglaciation processes in Val di Rabbi were already ongoing by around 14,000 cal BP at an altitude of 2300 m asl and that glacier oscillations might have affected the higher part of the region until about 9000 cal BP. 10 Be and 14 C ages correlate well with the altitude of the sampling sites and with the established Lateglacial chronology.

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The timing of glacier advances in the northern European Alps based on surface exposure dating with cosmogenic <sup>10</sup>Be, <sup>26</sup>Al, <sup>36</sup>Cl, and <sup>21</sup>Ne

Cited by 87 publications

References 54 publications

New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

First results of cosmogenic dated pre-Last Glaciation erratics from the Montoz area, Jura Mountains, Switzerland

Combination of Numerical Dating Techniques Using¹⁰Be in Rock Boulders and¹⁴C of Resilient Soil Organic Matter for Reconstructing the Chronology of Glacial and Periglacial Processes in a High Alpine Catchment during the Late Pleistocene and Early Holocene

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The timing of glacier advances in the northern European Alps based on surface exposure dating with cosmogenic <sup>10</sup>Be, <sup>26</sup>Al, <sup>36</sup>Cl, and <sup>21</sup>Ne

Cited by 87 publications

References 54 publications

New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

New chronological and stratigraphical data on the Ivrea amphitheatre (Piedmont, NW Italy)

First results of cosmogenic dated pre-Last Glaciation erratics from the Montoz area, Jura Mountains, Switzerland

Combination of Numerical Dating Techniques Using10Be in Rock Boulders and14C of Resilient Soil Organic Matter for Reconstructing the Chronology of Glacial and Periglacial Processes in a High Alpine Catchment during the Late Pleistocene and Early Holocene

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Combination of Numerical Dating Techniques Using¹⁰Be in Rock Boulders and¹⁴C of Resilient Soil Organic Matter for Reconstructing the Chronology of Glacial and Periglacial Processes in a High Alpine Catchment during the Late Pleistocene and Early Holocene