Test of thermoluminescence dating of loess from New Zealand and Alaska

Berger, Glenn W.; Pillans, Brad; Palmer, Alan

doi:10.1016/0277-3791(94)90110-4

Cited by 44 publications

(10 citation statements)

References 83 publications

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“…He reported ages of 150$20 ka for two analyses from the Holitna Lowland samples, and ages of 120$20 and 160$30 ka for two analyses from the Halfway House samples. These ages are in broad agreement with recent TL age determinations of bracketing loess around the Old Crow tephra reported by Berger et al (1994Berger et al ( , 1996. Using the partial bleach method, Berger et al (1994) reported bracketing TL ages of 140$30 ka (loess below the Old Crow tephra) and 110$32 ka (loess above the Old Crow tephra) at the Halfway House locality.…”

Section: Geochronology Of Interior Alaska Tephrassupporting

confidence: 87%

Vegetation and paleoclimate of the last interglacial period, central Alaska

Muhs

Ager

Begét

2001

Quaternary Science Reviews

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Follow this and additional works at: https://digitalcommons.unl.edu/usgsstaffpub Part of the Earth Sciences CommonsThis Article is brought to you for free and open access by the US Geological Survey at DigitalCommons@University of Nebraska -Lincoln. It has been accepted for inclusion in USGS Staff --Published Research by an authorized administrator of DigitalCommons@University of Nebraska -Lincoln.Muhs, Daniel R.; Ager, Thomas A.; and Begét, James E., "Vegetation and paleoclimate of the last interglacial period, central Alaska" (2001 AbstractThe last interglacial period is thought to be the last time global climate was signi"cantly warmer than present. New stratigraphic studies at Eva Creek, near Fairbanks, Alaska indicate a complex last interglacial record wherein periods of loess deposition alternated with periods of soil formation. The Eva Forest Bed appears to have formed about the time of or after deposition of the Old Crow tephra (dated to &160 to &120 ka), and is therefore correlated with the last interglacial period. Pollen, macrofossils, and soils from the Eva Forest Bed indicate that boreal forest was the dominant vegetation and precipitation may have been greater than present around Fairbanks during the peak of the last interglacial period. A new compilation of last interglacial localities indicates that boreal forest was extensive over interior Alaska and Yukon Territory. Boreal forest also extended beyond its present range onto the Seward and Baldwin Peninsulas, and probably migrated to higher elevations, now occupied by tundra, in the interior. Comparison of last interglacial pollen and macrofossil data with atmospheric general circulation model results shows both agreement and disagreement. Model results of warmer-than-present summers are in agreement with fossil data. However, numerous localities with boreal forest records are in con#ict with model reconstructions of an extensive cool steppe in interior Alaska and much of Yukon Territory during the last interglacial.

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Section: Geochronology Of Interior Alaska Tephrassupporting

confidence: 87%

Vegetation and paleoclimate of the last interglacial period, central Alaska

Muhs

Ager

Begét

2001

Quaternary Science Reviews

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“…The resultant blue emissions were measured at room temperature (~25 C) by a Thorn-EMI 9635 Q photomultiplier tube (Thorn EMI; Gencom, Fairfield, NJ) coupled with one 3-mm-thick Schott BG-39 (Schott Glass Technologies, Inc., Duryea, PA) and one 3-mm-thick Corning 7-59 glass filters (Corning Glass, Corning, NY) that block Ͼ90% luminescence emitted below 390 nm and above 490 nm from the sediments. Blue-dominated emissions were chosen for measurement because previous studies indicate greater suitability as a chronometer than ultraviolet wavelengths (e.g., Balescu and Lamothe, 1994;Berger et al, 1994;Lang and Wagner, 1996). The background count rate for measuring blue emissions was low (Ͻ80 counts/s), with a signal-to-noise ratio of Ͼ20.…”

Section: Discussionmentioning

confidence: 99%

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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“…20 to 250 ka old (e.g. Berger et al, 1994). However, other studies indicate that some luminescence ages> 120 ka, may be underestimates because of uncertainties in equivalent dose calculation with saturation in luminescence response to added dose and potential long-term instability of the luminescence signal (e.g.…”

Section: Discussionmentioning

confidence: 99%

Infrared and Red Stimulated Luminescence Dating of Late Quaternary Nearshore Sediments from Spitsbergen, Svalbard

Forman

1999

Arctic, Antarctic, and Alpine Research

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This study examined the potential of infrared (lRSL) and red (RSL) stimulated luminescence to provide ages for fine-grained polymineral extracts from sublittoral strata from deglacial-emergence sequences on Breggerhalveya, Linnedalen, and Kapp Ekholm, west Spitsbergen. IRSL analyses of modem and ca. 12-ka-old sediment indicate that residual levels defined after 10 and 60 min of filtered sunlight provide close minimum and maximum age estimates, respectively, whereas full solar resetting gave age overestimates by 2 to 18 ka. Although red stimulation yields concordant ages for modem and Holocene sediments, RSL is not currently as robust a geochronometer as IRSL, but is a complementary measure to evaluate IRSL age estimates. Sublittoral strata from the penultimate deglacial sequence (Episode B) on Breggerhalveya gave IRSL and RSL ages of ca.

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Test of thermoluminescence dating of loess from New Zealand and Alaska

Cited by 44 publications

References 83 publications

Vegetation and paleoclimate of the last interglacial period, central Alaska

Vegetation and paleoclimate of the last interglacial period, central Alaska

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

Infrared and Red Stimulated Luminescence Dating of Late Quaternary Nearshore Sediments from Spitsbergen, Svalbard

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