Late Pleistocene luminescence chronology of loess deposition in the Missouri and Mississippi river valleys, United States

Forman, Steven L.; Pierson, James

doi:10.1016/s0031-0182(02)00440-6

Cited by 116 publications

(93 citation statements)

References 73 publications

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“…This preheat, similar to previous studies (e.g., Kaufman et al, 1996Kaufman et al, , 2001Forman, 1999;Forman and Pierson, 2002;Forman et al, in press;Nowaczyk et al, 2002;Ollerhead et al, 1994;Stokes, 1992;Watanuki and Tsukamotto, 2001), is effective in largely circumventing an unstable luminescence component (e.g., anomalous fading; Wintle, 1973) associated with laboratory irradiation. Tests on luminescence signal stability were preformed by comparing changes in luminescence emissions for an additive dose between 0.8 and 1.6 kGy after preheating at 160°C for 10 hours and storage for 24 hr, separate aliquots were measured immediately and after storage at 25°C for 30 to 40 days (Table XI).…”

Section: Discussionsupporting

confidence: 84%

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Geoarchaeology of the Kostenki–Borshchevo sites, Don River Valley, Russia

et al. 2007

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The Kostenki–Borshchevo localities include 26 Upper Paleolithic sites on the first and second terraces along the west bank of the Don River, near Voronezh on the central East European Plain. Geoarchaeological research from 2001 through 2004 focused on sites Kostenki 1, 12, and 14, with additional work at Kostenki 11 and 16, and Borshchevo 5. The strata are grouped into three units (bottom up): Unit 1, > 50 ka, consists of coarse alluvium (representing upper terrace 2 deposits) and colluvium, overlain by fine‐grained sediments. Unit 2 includes archaeological horizons sealed within two sets of thin lenses of silt, carbonate, chalk fragments, and organic‐rich soils (termed the Lower Humic Bed and Upper Humic Bed) dating 50–30 ka. Separating the humic beds is a volcanic ash lens identified as the Campanian Ignimbrite Y5 tephra, dated elsewhere by Ar/Ar to ca. 40 ka. The humic beds appear to result from the complex interplay of soil formation, spring deposition, slope action, and other processes. Several horizons buried in the lower part of Unit 2 contain Upper Paleolithic assemblages. The springs and seeps, which are still present in the area today, emanated from the bedrock valley wall. Their presence may account for the unusually high concentration of Upper Paleolithic sites in this part of the central East European Plain. Unit 3, < 30 ka, contains redeposited loess with a buried soil (Gmelin Soil) overlain by a primary full‐glacial loess with an associated Chernozem (Mollisol), forming the surface of the second terrace. © 2007 Wiley Periodicals, Inc.

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Section: Discussionsupporting

confidence: 84%

“…Equivalent dose was calculated using the multiple-aliquot additive dose method (e.g. Lang, 1994;Richardson et al, 1997;Forman and Pierson, 2002). Optical stimulation of sediments was accomplished using an automated Daybreak 1100 reader with infrared emissions (880 80 nm) from a ring of 30 diodes (Spooner et al, 1990).…”

Section: Discussionmentioning

confidence: 99%

Geoarchaeology of the Kostenki–Borshchevo sites, Don River Valley, Russia

et al. 2007

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“…Dose recovery and preheat plateau tests were performed to ensure that the sediments were responsive to optical techniques and that the proper preheat temperatures were used in producing the equivalent dose (D e ) values. Fine-grained (4-11 mm) polymineral extracts for IRSL were dated using the total-bleach multiple-aliquot additive-dose (MAAD) method (Singhvi et al, 1982;Lang, 1994;Richardson et al, 1997;Forman and Pierson, 2002). A minimum of two analyses per IRSL sample by MAAD methods was performed.…”

Section: Luminescence Datingmentioning

confidence: 99%

Holocene landscape response to seasonality of storms in the Mojave Desert

Miller

Schmidt

Mahan

et al. 2010

Quaternary International

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Rene, "Holocene landscape response to seasonality of storms in the Mojave Desert" (2010 Periods of alluvial fan aggradation across the Mojave Desert are 14-9 cal ka and 6-3 cal ka. This timing largely correlates to times of increased sea-surface temperatures in the Gulf of California and enhanced warm-season monsoons. This correlation suggests that sustained alluvial fan aggradation may be driven by intense summer-season storms. These data suggest that the close proximity of the Mojave Desert to the Pacific Ocean and the Gulf of California promotes a partitioning of landscape-process responses to climate forcings that vary with seasonality of the dominant storms. Coolseason Pacific frontal storms cause river flow, ephemeral lakes, and fan incision, whereas periods of intense warm-season storms cause hillslope erosion and alluvial fan aggradation. The proposed landscape-process partitioning has important implications for hazard mitigation given that climate change may increase sea-surface temperatures in the Gulf of California, which indirectly could increase future alluvial fan aggradation.

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“…The benefit of using optical dating is that samples that have been exposed to only a few seconds of direct sunlight can be dated, which permits much younger samples to be dated than can be using TL. Optical dating has been crucial for providing chronologies for eolian activity in many parts of the world (e.g., Stokes and Gaylord, 1993;Ollerhead et al 1994;Stokes et al, 1997;Ivester et al, 2001;Arbogast et al, 2002;Chen et al, 2002;Forman and Pierson, 2002;Little et al, 2002;Thomas et al, 2002; this volume, among many others).…”

Section: Luminescence Datingmentioning

confidence: 99%

“…The advantages of single aliquot/grain methods are that (i) much less sample is needed; (ii) the experiments are simpler; and (iii) in situations where the depositional environment is such that a significant proportion of the grains in a sample had been inadequately bleached before burial, optical ages can be calculated from only those grains that had received sufficient sunlight exposure. Disadvantages and problems are low luminescence intensities (especially for young samples), underestimation of uncertainties arising from systematic effects (Murray and Olley, 2002), inadequate correction for sensitivity changes (e.g., Forman and Pierson, 2002), and lack of correction for anomalous fading (if feldspars are dated) and thermal transfer.…”

Section: Luminescence Datingmentioning

confidence: 99%

Optical Dating of Eolian Dune Sand from the Canadian Prairies*

Lian

Huntley

Wolfe

2004

gpq

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Optical dating is a well-established method that is used to determine the time elapsed since quartz or feldspar grains were last exposed to sunlight, which usually dates the time elapsed since their burial in a sedimentary deposit. Only a few seconds of direct sunlight are needed to reset the “mineral clock”, making the method ideal for dating the formation of eolian landforms. In this paper we describe how we use violet luminescence that is emitted in response to near-infrared excitation of sand-sized K-feldspar grains to date the time of formation of eolian dunes on the Canadian prairies. Using the multiple-aliquot with thermal transfer correction method, together with a test for sufficient sunlight exposure, and a correction for anomalous fading, we are able to produce accurate optical ages ranging from 150 years to more than 11 ka with precision usually better than 10 % at 2σ. Ages are given for dunes in the Dundurn and Elbow sand hills of south-central Saskatchewan, the climatic significance of which is provided in a paper also in the present volume. Knowledge of when the dunes were stable, and when they were not, is used to help understand the nature and timing of Holocene climate change in the area.La datation optique est une méthode reconnue employée pour déterminer le temps écoulé depuis que des grains de quartz ou de feldspath potassique ont été pour la dernière fois exposés à la lumière du soleil, ce qui correspond généralement au temps écoulé depuis leur enfouissement dans un dépôt sédimentaire. Quelques secondes seulement de lumière du soleil directe suffisent pour remettre à zéro « l’horloge minérale », ce qui en fait une méthode parfaitement appropriée pour dater la formation de dépôts éoliens. Nous décrivons ici comment utiliser la luminescence violette émise en réponse à une excitation à l’infrarouge des grains de feldspath de la taille du sable pour dater la formation des dunes dans les Prairies. Grâce à la méthode des portions aliquotes multiples comprenant une correction pour le transfert thermique, ainsi qu’un test d’exposition suffisante au soleil et une correction pour la décroissance anormale, nous pouvons obtenir des âges optiques précis à partir de 150 ans jusqu’à plus 11 ka avec une précision généralement supérieure à 10 % à 2σ. Les âges proviennent des dunes des collines Dundurn et Elbow, dans le centre sud de la Saskatchewan ; leur signification au plan climatique est donnée dans un autre article du présent numéro. La connaissance des périodes de stabilité des dunes sert à comprendre la nature et le synchronisme des changements climatiques survenus dans la région, au cours de l’HolocèneLa datación óptica es un método conocido que se emplea para determinar el tiempo transcurrido desde que los granos de cuarzo y feldespato fueron expuestos a la luz del sol, este proceso generalmente refleja el tiempo transcurrido durante el cual los sedimentos terminan por ser sepultados. Unos pocos segundos de exposición a la luz del sol bastan para poner en marcha el “reloj mineral”, esta característi...

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Late Pleistocene luminescence chronology of loess deposition in the Missouri and Mississippi river valleys, United States

Cited by 116 publications

References 73 publications

Geoarchaeology of the Kostenki–Borshchevo sites, Don River Valley, Russia

Geoarchaeology of the Kostenki–Borshchevo sites, Don River Valley, Russia

Holocene landscape response to seasonality of storms in the Mojave Desert

Optical Dating of Eolian Dune Sand from the Canadian Prairies*

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