A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21

Satow, Chris; Tomlinson, Emma L.; Grant, Katharine; Albert, Paul G.; Smith, Vicki; Manning, Christina; Ottolini, Luisa; Wulf, Sabine; Rohling, Eelco J.; Lowe, John J.; Blockley, Simon; Menzies, Martin

doi:10.1016/j.quascirev.2015.04.005

Cited by 66 publications

(122 citation statements)

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“…According to the speleothem-based chronology proposed for core LC21, the Pantelleritic layer was dated at ca. 133.5 ± 2 ka (Grant et al, 2012;Satow et al, 2015). This would be slightly older (although statistically indistinguishable) compared to the age reported from the Unit P at Pantelleria (ca.…”

Section: Resultsmentioning

confidence: 65%

“…3; Sprovieri et al, 2006;Tamburrino et al, 2012) this tephra layer (here correlated with ODP3 layer) corresponds to the first increase in the abundance of Globigerinoides ruber (a warm foraminifera taxa) after the end of MIS6. In core LC21 from the eastern Mediterranean, a pantelleritic tephra (Satow et al, 2015) was found at the beginning of the first decrease of G. ruber δ 18 O (Fig. 3).…”

Section: Resultsmentioning

confidence: 99%

“…3), which is indicative of warming conditions and probably correlates with the initial TIC increase observed in the DEEP site record. Following the revision proposed here, which substantially differs from the approach used by Francke et al (2015), Francke et al (2016) changed the age of OH-DP-0499 tephra to that of Satow et al (2015), which alleviated the discrepancies between the two age models for the period corresponding to the penultimate deglaciation (Fig. 4).…”

Section: Resultsmentioning

confidence: 99%

“…On the long-term scale, and using the chronological tie points of the 11 tephras from the orbital tuning used in the age model, relatively constant sedimentation rates are inferred for the DEEP core site record. On closer inspection, however, there might be significant changes, particularly at the MIS6-5e transition, as inferred from the new age model (see also Francke et al, 2016), as it is highly unlikely that a decrease in clastic input from the catchment (prevailing Satow et al (2015;after Grant et al, 2012), b from Tana che Urla record , c from Popoli section record , d from Corchia Cave CC28 record (Drysdale et al, 2007).…”

Section: ;mentioning

confidence: 96%

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Aligning and synchronization of MIS5 proxy records from Lake Ohrid (FYROM) with independently dated Mediterranean archives: implications for DEEP core chronology

et al. 2016

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Abstract. The DEEP site sediment sequence obtained during the ICDP SCOPSCO project at Lake Ohrid was dated using tephrostratigraphic information, cyclostratigraphy, and orbital tuning through the marine isotope stages (MIS) 15-1. Although this approach is suitable for the generation of a general chronological framework of the long succession, it is insufficient to resolve more detailed palaeoclimatological questions, such as leads and lags of climate events between marine and terrestrial records or between different regions. Here, we demonstrate how the use of different tie points can affect cyclostratigraphy and orbital tuning for the period between ca. 140 and 70 ka and how the results can be correlated with directly/indirectly radiometrically dated Mediterranean marine and continental proxy records. The alternative age model presented here shows consistent differences with that initially proposed by Francke et al. (2015) for the same interval, in particular at the level of the MIS6-5e transition. According to this new age model, different proxies from the DEEP site sediment record support an increase of temperatures between glacial to interglacial conditions, which is almost synchronous with a rapid increase in sea surface temperature observed in the western Mediterranean. The results show how a detailed study of independent chronological tie points is important to align different records and to highlight asynchronisms of climate events. Moreover, have incorporated the new chronology proposed for tephra OH-DP-0499 in the final DEEP age model. This has reduced substantially the chronological discrepancies between the DEEP site age model and the model proposed here for the last glacial-interglacial transition.

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Section: Resultsmentioning

confidence: 65%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: ;mentioning

confidence: 96%

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Aligning and synchronization of MIS5 proxy records from Lake Ohrid (FYROM) with independently dated Mediterranean archives: implications for DEEP core chronology

et al. 2016

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“…Wacha and Frechen (2011) dated a tephra in Croatian loess to 139 ± 9 ka (above) and 145 ± 12 ka (below), which is consistent with the L2 tephra found at Stalać. Moreover, a tephra in Lake Ohrid with an 40 Ar/ 39 Ar-age of 133.5 ± 2 ka (Leicher et al, 2016;Satow et al, 2015) might correlate to this L2 tephra. Unfortunately, the glass shards from this layer were weathered, and consequently this tephra cannot be identified geochemically.…”

Section: Stratigraphical Implicationsmentioning

confidence: 88%

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

et al. 2017

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Abstract:A new geochronology was established for the Stalać loess-paleosol sequence (LPS) in Serbia. The section is located in the interior of the Central Balkan region, south of the typical loess distribution, in a zone of paleoclimatic shifts between continental and Mediterranean climate regimes. The sampled sequence contains four well-developed paleosol and loess layers, a crypto tephra and one visible tephra layer. Optically stimulated luminescence measurements showed a strong dependency of preheat temperature on equivalent dose for one fine-grained quartz sample, which makes it unsuitable for dating. A firm chronology framing the last two glacial cycles was established using finegrained polyminerals and the post-infrared infrared stimulated luminescence (pIR 50 IR 290 ) protocol instead. The characteristics of dated paleosols indicate similar climatic conditions during the last interstadial and interglacial phases, which were different from the penultimate interglacial period. The tephra within the L2 loess, probably related to tephra layers also found in other sections in Southeastern Europe, was sandwich-dated. The results indicate an age between 118 ka and 141 ka. Furthermore, a weak pedogenic layer dated to between 126 ka and 148 ka gives a first numerical age to this soil formation in Southeastern Europe.

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Comparison and synthesis of sea-level and deep-sea temperature variations over the past 40 million years

Rohling

Foster

Gernon

et al. 2022

Preprint

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Global ice volume (sea level) and deep-sea temperature are key measures of Earth's climatic state. We synthesize evidence for multi-centennial to millennial ice-volume and deep-sea temperature variations over the past 40 million years, which encompass the early glaciation of Antarctica at ˜34 million years ago (Ma), the end of the Middle Miocene Climate Optimum, and the descent into the bipolar glaciation state from ˜3.4 Ma. We compare different sea-level and deep-water temperature reconstructions that are grounded in data to build a resource for validation of long-term numerical model-based approaches. We present: (a) a new ice-volume and deep-sea temperature synthesis for the past 5.3 million years; (b) a single template reconstruction of ice-volume and deep-sea temperature for the interval between 5.3 and 40 Ma; and (c) a discussion of uncertainties and limitations. We highlight key issues associated with glacial state changes in the geological record from 40 Ma to the present that require specific attention in further research. These include offsets between calibration-sensitive versus more thermodynamically guided deep-sea paleothermometry proxy measurements; a conundrum related to the magnitudes of sea-level and deep-sea temperature change at the Eocene-Oligocene transition at 34 Ma; a discrepancy in deep-sea temperature levels during the Middle Miocene between proxy reconstructions and model-based deconvolutions of deep-sea oxygen isotope data; and a hitherto unquantified non-linear reduction of glacial deep-sea temperatures through the past 3.4 million years toward a near-freezing deep-sea temperature asymptote, while sea level stepped down in a more linear manner.

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A new contribution to the Late Quaternary tephrostratigraphy of the Mediterranean: Aegean Sea core LC21

Cited by 66 publications

References 82 publications

Aligning and synchronization of MIS5 proxy records from Lake Ohrid (FYROM) with independently dated Mediterranean archives: implications for DEEP core chronology

Aligning and synchronization of MIS5 proxy records from Lake Ohrid (FYROM) with independently dated Mediterranean archives: implications for DEEP core chronology

New luminescence-based geochronology framing the last two glacial cycles at the southern limit of European Pleistocene loess in Stalać (Serbia)

Comparison and synthesis of sea-level and deep-sea temperature variations over the past 40 million years

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