Explosive volcanic activity in the Mediterranean over the past 200,000 yr as recorded in deep-sea sediments

Keller, J.; Ryan, William B. F.; Ninkovich, Dragoslav; Altherr, Rainer

doi:10.1130/0016-7606(1978)89<591:evaitm>2.0.co;2

Cited by 389 publications

(328 citation statements)

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“…and Dictyococcites spp. and noticed that these were particularly abundant above sapropel S1, between tephra Y-5 (35 ka, Keller et al, 1978) and the base of S1, but rare to absent within the sapropel, and very rare or absent below the tephra base. The authors discussed the possibility that the ''anomalous assemblage'' observed within the Emiliania huxleyi Acme Zone was reworked.…”

Section: Previous Studiesmentioning

confidence: 99%

“…3a), has been related to a basaltic Plinian Etna eruption that occurred at 122 years BC (Coltelli et al, 1998). The tephra in core BC3 identified as Y-5 occurred at 35 ka BP (Keller et al, 1978) (Fig. 3e), whereas the tephra recovered in core BC19 has been identified as Z-2 (Fig.…”

Section: Lm Morphotypes In Tephra Layersmentioning

confidence: 99%

“…Age of D1 lower limit is the mean of age of D1 obtained in the cores on the base of the sedimentation rate of S1 sapropel. The lower part of the figure has been constructed on the base of sedimentation rate of core BC3 calculated dating S1 bottom and tephta Y-5 (at 81.2 cm; 35 ka; Keller et al, 1978) as well as lower limits of D2 -D4. diagenetic modifications causing virtually no overgrowth of E. huxleyi coccoliths (EXO close to 0).…”

Section: Diagenetic History 451 Eastern Mediterraneanmentioning

confidence: 99%

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Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Crudeli

Young

Erba

et al. 2004

Marine Micropaleontology

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In studying the Holocene -late Pleistocene record of the Eastern Mediterranean, considerable Emiliania huxleyi size/shape variation not clearly assignable to primary or secondary calcification was observed. Accordingly, different morphotypes were distinguished by light microscope (LM).A subsequent scanning electron microscope (SEM) analysis of selected samples has indicated that Emiliania huxleyi coccoliths are variably affected by carbonate diagenesis in these sediments. A series of diagenetic stages were qualitatively defined, comprising well-preserved specimens, three overgrowth (OG1 to OG3) and one etching (E1) stage. Comparing SEM and LM observations, a tentative correlation between the E. huxleyi calcified LM-morphotypes and E. huxleyi SEM-overgrowth stages is proposed here.Our study not only indicates that Emiliania huxleyi coccoliths are strongly influenced by carbonate diagenesis, but also that they show effects of carbonate precipitation and dissolution much more clearly than other coccoliths. The relative abundances of the different LM-morphotypes were used to define an E. huxleyi overgrowth index (EXO) that qualitatively estimates carbonate precipitation/dissolution on coccoliths in this sediment. This resulted in definition of five ''Diagenetic'' intervals (D1 to D5). Deposition of sapropel S1 was a time of good preservation with variable dissolution and no overgrowth of E. huxleyi coccoliths, whereas calcite overgrowth was high during the Last Glacial Maximum (LGM) and interglacial period and, to a lesser extent, during the Younger Dryas and through the last 5 ka. D

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Section: Previous Studiesmentioning

confidence: 99%

Section: Lm Morphotypes In Tephra Layersmentioning

confidence: 99%

Section: Diagenetic History 451 Eastern Mediterraneanmentioning

confidence: 99%

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Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Crudeli

Young

Erba

et al. 2004

Marine Micropaleontology

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“…Eifel data from: Litt et al, 2001;Moscariello and Costa, 1997;van den Bogaard and Schmincke, 1985;Vanniere et al, 2004. Italian data from: Calanchi et al, 1996;Jahns and van den Bogaard, 1998;Keller et al, 1978;Schmidt et al, 2002;Wulf et al, 2004. Hellenic Arc data from: Wulf et al, 2002 We are now beginning to apply this approach to archaeological questions and have recently identified microtephra layers in several archaeological sequences covering the Late Bronze Age through to the Early Upper Palaeolithic (publications forthcoming) including sites in southern and eastern England, a region from which tephras of these ages had not previously been detected (Matthews et al, in preparation).…”

Section: The Timing Of Human Expansion In Northwest Europe and Of Abrmentioning

confidence: 99%

The chronology of abrupt climate change and Late Upper Palaeolithic human adaptation in Europe

Blockley

Donahue

et al. 2006

J Quaternary Science

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This paper addresses the possible connections between the onset of human expansion in Europe following the Last Glacial Maximum, and the timing of abrupt climate warming at the onset of the Lateglacial (Bö lling/Allerød) Interstadial. There are opposing views as to whether or not human populations and activities were directly 'forced' by climate change, based on different comparisons between archaeological and environmental data. We review the geochronological assumptions and approaches on which data comparisons have been attempted in the past, and argue that the uncertainties presently associated with age models based on calibrated radiocarbon dates preclude robust testing of the competing models, particularly when comparing the data to non-radiocarbonbased timescales such as the Greenland ice core records. The paper concludes with some suggestions as to the steps that will be necessary if more robust tests of the models are to be developed in the future.

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“…Of the remaining six tephra layers, three can be correlated to layers identifed in core RF95-7 624 (Calanchi and Dinelli, 2008), with PRAD-3336 and PRAD-3586 also being correlated to the 625 Mediterranean marker layers, W-1 and V-2 of Keller et al, (1978). The final three layers, 626 detected for the first time, cannot presently be correlated with known events.…”

mentioning

confidence: 98%

Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200–80 ka

Bourne

Albert

Matthews

et al. 2015

Quaternary Science Reviews

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Explosive volcanic activity in the Mediterranean over the past 200,000 yr as recorded in deep-sea sediments

Cited by 389 publications

References 0 publications

Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

Abnormal carbonate diagenesis in Holocene–late Pleistocene sapropel-associated sediments from the Eastern Mediterranean; evidence from Emiliania huxleyi coccolith morphology

The chronology of abrupt climate change and Late Upper Palaeolithic human adaptation in Europe

Tephrochronology of core PRAD 1-2 from the Adriatic Sea: insights into Italian explosive volcanism for the period 200–80 ka

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