Luminescence chronology of the northeastern Bulgarian loess-paleosol sequences (Viatovo and Kaolinovo)

Balescu, Sanda; Jordanova, Diana; Brisson, Laurence Forget; Hardy, F.; Huot, Sébastien; Lamothe, Michel

doi:10.1016/j.quaint.2019.04.020

Cited by 12 publications

(13 citation statements)

References 53 publications

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“…Balescu et al . (in press) determined extremely low fading rates (<0.18%/decade) for pIRIR 290 signals emitted by K‐feldspars extracted from Bulgarian loess.…”

Section: Resultsmentioning

confidence: 99%

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Avram

Constantin

Vereș

et al. 2020

Boreas

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The loess–palaeosol sequence of Batajnica (Vojvodina region, Serbia) is considered as one of the most complete and thickest terrestrial palaeoclimate archives for the Middle and Late Pleistocene. In order to achieve a numerical chronology for this profile, four sets of ages were obtained on 18 individual samples. Equivalent doses were determined using the SAR protocol on fine (4–11 μm) and coarse (63–90 μm) quartz fractions, as well as on polymineral fine grains by using two elevated temperature infrared stimulation methods, pIRIR290 and pIRIR225. We show that the upper age limit of coarse quartz OSL and polymineral pIRIR290 and pIRIR225 techniques is restricted to the Last Glacial/Interglacial cycle due to the field saturation of the natural signals. Luminescence ages on coarse quartz, pIRIR225 and pIRIR290 polymineral fine grains are in general agreement. Fine quartz ages are systematically lower than the coarse quartz and pIRIR ages, the degree of underestimation increasing with age. Comparison between natural and laboratory dose response curves indicate the age range over which each protocol provides reliable ages. For fine and coarse quartz, the natural and laboratory dose response curves overlap up to ~150 and ~250 Gy, respectively, suggesting that the SAR protocol provides reliable ages up to c. 50 ka on fine quartz and c. 100 ka on coarse quartz. Using the pIRIR225 and pIRIR290 protocols, equivalent doses up to ~400 Gy can be determined, beyond which in the case of the former the natural dose response curve slightly overestimates the laboratory dose response curve. Our results suggest that the choice of the mineral and luminescence technique to be used for dating loess sediments should take into consideration the reported limited reliability.

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“…Balescu et al . (in press) determined extremely low fading rates (<0.18%/decade) for pIRIR 290 signals emitted by K‐feldspars extracted from Bulgarian loess.…”

Section: Resultsmentioning

confidence: 99%

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Avram

Constantin

Vereș

et al. 2020

Boreas

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“…If there is a striking discontinuity in the range of Salvia austriaca s.str., it must date back to the warmer and wetter periods of the Eemian interglacial (130,000-115,000 years ago; Neem Community Members, 2013) or to the Holocene climate optimum (7000-8000 years ago). As shown by several authors (Conea, 1970;Ghenea & Rădan, 1993;Van Andel & Tzedakis, 1996;Markova, 2000;Tomescu, 2000;Lindner & al., 2004;Magyari & al., 2010;Timar-Gabor & al., 2011;Bălescu, & al., 2020), there was a continuity of forest-steppe habitats between Crimea and central Europe during these periods, thus implying that S. austriaca s.str. is currently in refugium in Crimea, possibly since 115,000 years ago.…”

Section: ■ Discussionmentioning

confidence: 99%

Hiding in plain sight: Integrative analyses uncover a cryptic Salvia species in Europe

Mátis

Malkócs

Kühn

et al. 2022

TAXON

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Salvia is the most species-rich genus of the family Lamiaceae, currently numbering almost 1000 species. The diagnostic feature of the genus is the unique staminal lever mechanism that allows for specific pollination modes. We encountered an unusual Salvia form in the field, in SE Romania, which resembles S. austriaca but features a radically different lever mechanism. This form proved to be geographically widespread on the Pontic steppe, never occurring in sympatry with S. austriaca. We used an integrative approach, employing morphometric and phylogenomic (RADseq) analyses, to study this unusual form. The taxon's floral morphology proved to be consistently and subtly different from that of S. austriaca, and similarly, Bayesian species delimitation using genome-wide SNP data indicated species-level differences. Our results provide compelling evidence that points toward the discovery of an unrecognized species. This species has been overlooked for centuries, misidentified as S. austriaca, a closely related taxon. The new species differs from S. austriaca in key features of floral structure, habitat preference, and distribution. The potential range of this cryptic species, its pollination biology, ecology, and phylogeography are discussed.

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“…A comparison of the speleothem‐based evolution of MIS 7 to MIS 5 with what is known from the surrounding loess sequences (Danube Valley, Antoine et al ., 2019; Balescu et al ., 2020) and Lake Ohrid deposits (between Greece and Albania, Francke et al ., 2016; Sadori et al ., 2016) reveals striking similarities. For example, the deposition of a regular candle‐shaped stalagmite during MIS 7, but an absence of deposition during MIS 5, interpreted as probably drier conditions, agrees with generally drier interglacial periods after MIS 7 (Sadori et al ., 2016), aridification during interglacial periods (Balescu et al ., 2020) and more evaporites in Lake Ohrid during MIS 5 than during MIS 7 (Francke et al ., 2016). A dry MIS 5e, as suggested by the MK stalagmite, adds to the hypothesis of Antoine et al .…”

Section: Discussionmentioning

confidence: 99%

Speleothem‐based chronology and environmental context of deposits from the Mishin Kamik Cave, NW Bulgaria – A contribution to the archaeological study of the Late Pleistocene human occupation in the Balkans

Verheyden

Marinova

Ivanova

et al. 2021

J Quaternary Science

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The Balkan Peninsula represents one of the most important human pathways into and out of Europe during the Pleistocene. Mishin Kamik cave, located in the karst region of Western Stara Planina, has a rich faunal content and shows promising features indicating a human occupation site with the discovery of potential bone artefacts and an intriguing accumulation of bear skulls and bones. Petrographic study and U‐series dating of a stalagmite and other calcite deposits in the cave provide an absolute chronological frame for the detrital infillings and their archaeological content and inform the environmental and climatic context of the cave evolution. Most detrital deposits in the cave were probably deposited before Marine Isotope Stage (MIS) 5 and the cave morphology and sedimentary deposits display current morphologies since ~135 ka. Consequently, the palaeontological and archaeological findings are older than ~135 ka. Calcite dated on and under the accumulation of bear skulls and bones suggests deposition during MIS 7. A first depositional contextualization of the bone accumulation does not allow us to discriminate between a natural or anthropogenic origin. The study emphasizes the added value of speleothem studies in archaeological sites and particularly in bringing a well‐constrained chronological and environmental framework.

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Luminescence chronology of the northeastern Bulgarian loess-paleosol sequences (Viatovo and Kaolinovo)

Cited by 12 publications

References 53 publications

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Testing polymineral post‐IR IRSLand quartzSAR‐OSLprotocols on Middle to Late Pleistocene loess at Batajnica, Serbia

Hiding in plain sight: Integrative analyses uncover a cryptic Salvia species in Europe

Speleothem‐based chronology and environmental context of deposits from the Mishin Kamik Cave, NW Bulgaria – A contribution to the archaeological study of the Late Pleistocene human occupation in the Balkans

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