Maurice Arnold
Datos Biográficos
| ID | 3643296 |
|---|---|
| NOMBRE | Maurice Arnold |
| NOMBRES | Maurice |
| APELLIDO | Arnold |
| FIRMA | ARNOLD M |
| AFILIACIONES | Centre National de la Recherche Scientifique |
| VERIFICADO | No |
| TOTAL DE OBRAS | 28 |
| TOTAL DE CITAS | 251 |
| TOTAL COMO AUTOR | 28 |
| TOTAL COMO EDITOR | 0 |
| PRIMER AÑO DE PUBLICACIÓN | 1986 |
| AÑO MÁS RECIENTE DE PUBLICACIÓN | 2024 |
| ÍNDICE H | 8 |
Radiocarbon Dating on Echo Micadas, Lsce, Gif-Sur-Yvette, France
The Laboratoire des Sciences du Climat et de l’Environnement (LSCE) has operated a radiocarbon dating laboratory for almost 70 years. It has evolved from a traditional ß-decay counting to an accelerator mass spectrometry facility. In 2015, the LSCE received a major upgrade with the installation of a MICADAS. This evolution required adjustments in sample preparation to match the new capability to date samples as small as a few tens of μgC. We summ…
Late Quaternary deglaciation of Prince William Sound, Alaska
To understand the timing of deglaciation of the northernmost marine-terminating glaciers of the Cordilleran Ice Sheet (CIS), we obtained 26 10 Be surface-exposure ages from glacially scoured bedrock surfaces in Prince William Sound (PWS), Alaska. We sampled six elevation transects between sea level and 620 m and spanning a distance of 14 to 70 km along ice flow paths. Most transect age–elevation patterns could not be explained by a simple model o…
Holocene rockfalls in the southern Negev Desert, Israel and their relation to Dead Sea fault earthquakes
Rockfall ages in tectonically active regions provide information regarding frequency and magnitude of earthquakes. In the hyper-arid environment of the Dead Sea fault (DSF), southern Israel, rockfalls are most probably triggered by earthquakes. We dated rockfalls along the western margin of the DSF using terrestrial cosmogenic nuclides (TCN). At each rockfall site, samples were collected from simultaneously exposed conjugate boulders and cliff su…
Oceanic rock art
Rock art in an inland cave on the island of Lifou, New Caledonia, has been radiocarbon dated. A cluster of early paintings date to 2500 years ago, soon after the arrival of the first settlers, who must have quickly gone inland probably in pursuit of fresh water, available near the cave. They left their mark on the cave in the form of numerous hand stencils. During the first millennium AD, later generations of artists used the same cave, drawing b…
Bilan des datations carbone 14 effectuées sur des charbons de bois de la grotte Chauvet
After a brief presentation of the experimental protocols, this article discusses the results of the 14C dates obtained from charcoal specimens collected on the walls (drawings and torch-wipes) and on the ground of the Chauvet Cave. The dates, which are coherent, can be divided into two periods a few millennia apart: between 33000 and 29000 14C years BP (33 samples including the five parietal representations) and between 27000 and 24500 14 C years…
Paired 14 C and 230 Th/U Dating of Surface Corals from the Marquesas and Vanuatu (Sub-Equatorial Pacific) in the 3000 to 15,000 Cal Yr Interval
Paired radiocarbon and 230 Th/U dating was performed on 13 surface corals from submerged reefs in the Marquesas and from raised terraces in Vanuatu. The absolute ages of the corals analyzed ranged from 3000 to 15,000 cal yr. Estimates of the difference between the absolute and 14 C ages of these corals are in agreement with previous determinations up until 11,500 cal yr. The resulting mean sea surface reservoir age R is determined at 390 ± 60 yr …
Oceanic Radiocarbon and Tritium On A Transect Between Australia and Bali (Eastern Indian Ocean)
Results are presented of radiocarbon and tritium measurements along a transect between the Australian continental shelf and the Indonesian coast of Bali. The stations lie in the easternmost part of the Indian Ocean, close to the sills over which the Indonesian throughflow (ITF) makes its way to the Indian Ocean. The present data, obtained as part of the Java-Australia Dynamics Experiment (JADE) in August 1989, complement the WOCE 14 C and tritium…
Datation de vestiges humains présumés du Paléolithique supérieur par la méthode du Carbone 14 en spectrométrie de masse par accélérateur / Accelerator mass spectrometry radiocarbon dates of human rema…
Cet article présente et discute les résultats de la datation directe de vestiges humains (Sud-Ouest de la France) présumés du Paléolithique supérieur par la méthode du carbone 14 en spectrométrie de masse par accélérateur (SMA). L'utilisation de cette méthode est souvent la seule solution pour replacer dans un cadre chronologique des vestiges humains dont l'attribution au Paléolithique supérieur repose sur des données peu fiables. Les résultats o…
Radiocarbon Calibration by Means of Varves Versus 14 C Ages of Terrestrial Macrofossils from Lake Gościąż and Lake Perespilno, Poland
This paper presents radiocarbon dates of terrestrial macrofossils from Lakes Gościąż and Perespilno, Poland. These data agree very well with most of the German pine calibration curve. In the Late Glacial, they generally agree with the data from Lake Suigetsu, Japan, and indicate constant or even increasing 14 C age between 12.9 and 12.7 ka BP, rapid decline of 14 C age around 12.6 ka BP, and a long plateau 10,400 14 C BP around 12 ka BP. Correlat…
Radiocarbon Reservoir Ages in the Mediterranean Sea and Black Sea
We measured apparent marine radiocarbon ages for the Mediterranean Sea, Black Sea, and Red Sea by accelerator mass spectrometry radiocarbon analyses of 26 modern, pre-bomb mollusk shells collected living between AD 1837 and 1950. The marine reservoir (R(t)) ages were estimated at some 390 ± 85 yr BP, 415 ± 90 yr BP and 440 ± 40 yr BP, respectively. R(t) ages in the Mediterranean Sea and Black Sea are comparable to those for the North Atlantic Oce…
Oceanic Radiocarbon Between Antarctica and South Africa Along Woce Section 16 at 30°E
Accelerator mass spectrometry (AMS) radiocarbon measurements were made on 120 samples collected between Antarctica and South Africa along 30°E during the WOCE-France CIVA1 campaign in February 1993. Our principal objective was to complement the Southern Ocean's sparse existing data set in order to improve the 14 C benchmark used for validating ocean carbon-cycle models, which disagree considerably in this region. Measured 14 C is consistent with …
Radiocarbon Calibration by Means of Mass Spectrometric 230 Th/ 234 U and 14 C Ages of Corals
As first shown by Bard et al. (1990a), high-precision 230 Th- 234 U ages can be used successfully to calibrate the radiocarbon time scale beyond the high-precision tree-ring calibration that now reaches 11,900 cal bp (Kromer and Spurk 1998). Using mass spectrometric techniques, we measured 14 C and 230 Th ages on new samples collected from boreholes drilled off the islands of Tahiti and Mururoa (French Polynesia) in order to complement the databa…
Termination of the Last Glaciation in the Iberian Peninsula Inferred from the Pollen Sequence of Quintanar de la Sierra
A 4.5-m-thick late-glacial pollen sequence, supported by 17 AMS 14 C dates, has been investigated at the Quintanar de la Sierra marshland (Iberian cordillera, north-central Spain). Pollen zones were defined that correspond to successive phases in vegetation history during the end of the Late Würm, late-glacial interstade, and Younger Dryas periods. A transfer function approach has been adopted to derive quantitative climate estimates from the pol…
News from Cosquer Cave
Further work inside the Grotte Cosquer, the Palaeolithic painted cave near Marseilles only accessible by a deep-water dive, improves our knowledge and makes it clear there can be no artificial entrance made to create a dry-land access
Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge
The Younger Dryas Cold Event—Was It Synchronous Over the North Atlantic Region
Determined independently from annually laminated ice cores and lake sediments, and German pines, the calendar ages of Younger Dryas (YD) boundaries significantly disagree with one another. 14 C dates, plotted vs. calendar ages for samples from different sediments, also reveal distinct offsets. The adjustment of varve chronologies to synchronize the boundaries of the YD nearly cancels the discrepancies between 14 C data, and supports the synchroni…
Radiocarbon Chronology of Late Glacial and Holocene Sedimentation and Water-Level Changes in the Area of the Gościąż Lake Basin
We obtained 14 C ages on samples of lake marl and other sediments from cores taken in Gościąż Lake and its environs. Comparison of 14 C dates of bulk samples of laminated sediment with varve chronology and available AMS dates of terrestrial macrofossils indicates a reservoir correction of 2000 ± 120 yr for the basal series of lake sediments. 14 C dates obtained on peat layers underlying the oldest lacustrine sediments in Gościąż and other lakes c…
Seismic uplift of the harbour of ancient Aigeira, Central Greece
The Mavra Litharia cove, between Akrata and Derveni, in the North Peloponnesian coast (Central Greece), has been identified as the site of the harbour of the Hellenistic Aigeira, one of the very few natural harbours along the uplifting, fault-controlled North Peloponnesian coast. Geomorphological, marine biological and archaeological data as well as radiocarbon dating of marine fossils testify to a 2m relative land uplift since Hellenistic times …
Th- 234 U and 14 C Ages Obtained by Mass Spectrometry on Corals
In 1988, Fairbanks conducted a drilling expedition off the south coast of Barbados to recover submerged corals contemporaneous with the last deglaciation. Core recovery was excellent and >30 different samples were dated by conventional β-counting techniques (Fairbanks 1989). At about the same time, we developed, at Lamont, the thermal ionization mass spectrometry (TIMS) technique to obtain precise U-Th ages (Edwards 1988), and to compare them wit…
Des dates pour Niaux et Gargas
Clottes Jean, Valladas Hélène, Cachier Hélène, Arnold Maurice. Des dates pour Niaux et Gargas. In: Bulletin de la Société préhistorique française, tome 89, n°9, 1992. pp. 270-274
Possibilities for Reconstructing Radiocarbon Level Changes During the Late Glacial by Using a Laminated Sequence of Gościaż Lake
Laminated sediments of Gościaż Lake can be used as an independent source of material for calibrating the radiocarbon time scale. The varve chronology is based on three long cores from the deepest part of the lake, with one additional core from the second deepest part. From pollen and Cladocera spectra and stable isotope and chemical content sequences, we have determined the Allerød(AL)/Younger Dryas(YD) and Younger Dryas/Preboreal(PB) boundaries …
Sea-Level Estimates during the Last Deglaciation Based on δ 18 O and Accelerator Mass Spectrometry 14 C Ages Measured in Globigerina bulloides
Coupled measurements of δ 18 O and accelerator mass spectrometry (AMS) 14 C in a particular species of planktonic foraminifera may be used to calculate sea-level estimates for the last deglaciation. Of critical importance for this type of study is a knowledge of the seasonality of foraminiferal growth, which can be provided by δ 18 O measurements of modern shells (core tops, plankton tows). Isotopic (δ 18 O, AMS- 14 C dating) and faunal records (…
AMS- 14 C Ages Measured in Deep Sea Cores from the Southern Ocean
14 C dates obtained by accelerator mass spectrometry (AMS) on monospecific foraminiferal samples from two deep-sea sediment cores raised in the Indian sector of the Southern Ocean have been corrected for the difference in 14 C composition between atmosphere and sea surface by using a reconstruction of the latitudinal 14 C gradient which existed in the Southern Ocean prior to 1962. The corrected AMS- 14 C data show a reduced sedimentation rate in …
Bomb 14C in the Indian Ocean Measured by Accelerator Mass Spectrometry
AMS 14 C measurements on samples collected in the tropical-equatorial Indian Ocean during the INDIGO program (leg II, 1986) are presented and compared with β-counting results obtained under both INDIGO program and GEOSECS expedition in the Indian Ocean (1978). The most significant observation is a doubling of the bomb- 14 C inventory and mean penetration depth in the equatorial zone. Based on hydrologic considerations, two hypotheses can be propo…
AMS 14C Study of Transient Events and of the Ventilation Rate of the Pacific Intermediate Water During the Last Deglaciation
14 C analysis of monospecific samples of planktonic and benthic foraminifera were performed in deep-sea sediment cores from the Atlantic and Pacific Oceans by Accelerator Mass Spectrometry (AMS). These measurements demonstrate that the Younger Dryas cold event, first described in the north Atlantic, is also present at the same time in the north Pacific Ocean. The comparison of the 14 C ages of planktonic and benthic foraminifera from the same sed…
Th- 234 U and 14 C Ages Obtained by Mass Spectrometry on Corals
In 1988, Fairbanks conducted a drilling expedition off the south coast of Barbados to recover submerged corals contemporaneous with the last deglaciation. Core recovery was excellent and >30 different samples were dated by conventional β-counting techniques (Fairbanks 1989). At about the same time, we developed, at Lamont, the thermal ionization mass spectrometry (TIMS) technique to obtain precise U-Th ages (Edwards 1988), and to compare them wit…
Radiocarbon Calibration by Means of Mass Spectrometric 230 Th/ 234 U and 14 C Ages of Corals
As first shown by Bard et al. (1990a), high-precision 230 Th- 234 U ages can be used successfully to calibrate the radiocarbon time scale beyond the high-precision tree-ring calibration that now reaches 11,900 cal bp (Kromer and Spurk 1998). Using mass spectrometric techniques, we measured 14 C and 230 Th ages on new samples collected from boreholes drilled off the islands of Tahiti and Mururoa (French Polynesia) in order to complement the databa…
Radiocarbon Reservoir Ages in the Mediterranean Sea and Black Sea
We measured apparent marine radiocarbon ages for the Mediterranean Sea, Black Sea, and Red Sea by accelerator mass spectrometry radiocarbon analyses of 26 modern, pre-bomb mollusk shells collected living between AD 1837 and 1950. The marine reservoir (R(t)) ages were estimated at some 390 ± 85 yr BP, 415 ± 90 yr BP and 440 ± 40 yr BP, respectively. R(t) ages in the Mediterranean Sea and Black Sea are comparable to those for the North Atlantic Oce…
Datation de vestiges humains présumés du Paléolithique supérieur par la méthode du Carbone 14 en spectrométrie de masse par accélérateur / Accelerator mass spectrometry radiocarbon dates of human rema…
Cet article présente et discute les résultats de la datation directe de vestiges humains (Sud-Ouest de la France) présumés du Paléolithique supérieur par la méthode du carbone 14 en spectrométrie de masse par accélérateur (SMA). L'utilisation de cette méthode est souvent la seule solution pour replacer dans un cadre chronologique des vestiges humains dont l'attribution au Paléolithique supérieur repose sur des données peu fiables. Les résultats o…
C Dating with the Gif-sur-Yvette Tandetron Accelerator
The standard procedure for measuring 14 C at the Gif-sur-Yvette Tandetron AMS facility is described. A new sample manipulator and automated measurements are being used and have been operational for six months. Evidence of isotopic fractionation in the sputter ion source is provided. We take this into account by measuring the 13 C/ 12 C ratio of the sample in the accelerator
Bilan des datations carbone 14 effectuées sur des charbons de bois de la grotte Chauvet
After a brief presentation of the experimental protocols, this article discusses the results of the 14C dates obtained from charcoal specimens collected on the walls (drawings and torch-wipes) and on the ground of the Chauvet Cave. The dates, which are coherent, can be divided into two periods a few millennia apart: between 33000 and 29000 14C years BP (33 samples including the five parietal representations) and between 27000 and 24500 14 C years…
Des dates pour Niaux et Gargas
Clottes Jean, Valladas Hélène, Cachier Hélène, Arnold Maurice. Des dates pour Niaux et Gargas. In: Bulletin de la Société préhistorique française, tome 89, n°9, 1992. pp. 270-274
Paired 14 C and 230 Th/U Dating of Surface Corals from the Marquesas and Vanuatu (Sub-Equatorial Pacific) in the 3000 to 15,000 Cal Yr Interval
Paired radiocarbon and 230 Th/U dating was performed on 13 surface corals from submerged reefs in the Marquesas and from raised terraces in Vanuatu. The absolute ages of the corals analyzed ranged from 3000 to 15,000 cal yr. Estimates of the difference between the absolute and 14 C ages of these corals are in agreement with previous determinations up until 11,500 cal yr. The resulting mean sea surface reservoir age R is determined at 390 ± 60 yr …
Radiocarbon Calibration by Means of Varves Versus 14 C Ages of Terrestrial Macrofossils from Lake Gościąż and Lake Perespilno, Poland
This paper presents radiocarbon dates of terrestrial macrofossils from Lakes Gościąż and Perespilno, Poland. These data agree very well with most of the German pine calibration curve. In the Late Glacial, they generally agree with the data from Lake Suigetsu, Japan, and indicate constant or even increasing 14 C age between 12.9 and 12.7 ka BP, rapid decline of 14 C age around 12.6 ka BP, and a long plateau 10,400 14 C BP around 12 ka BP. Correlat…
Possibilities for Reconstructing Radiocarbon Level Changes During the Late Glacial by Using a Laminated Sequence of Gościaż Lake
Laminated sediments of Gościaż Lake can be used as an independent source of material for calibrating the radiocarbon time scale. The varve chronology is based on three long cores from the deepest part of the lake, with one additional core from the second deepest part. From pollen and Cladocera spectra and stable isotope and chemical content sequences, we have determined the Allerød(AL)/Younger Dryas(YD) and Younger Dryas/Preboreal(PB) boundaries …
Bomb 14C in the Indian Ocean Measured by Accelerator Mass Spectrometry
AMS 14 C measurements on samples collected in the tropical-equatorial Indian Ocean during the INDIGO program (leg II, 1986) are presented and compared with β-counting results obtained under both INDIGO program and GEOSECS expedition in the Indian Ocean (1978). The most significant observation is a doubling of the bomb- 14 C inventory and mean penetration depth in the equatorial zone. Based on hydrologic considerations, two hypotheses can be propo…
Oceanic Radiocarbon Between Antarctica and South Africa Along Woce Section 16 at 30°E
Accelerator mass spectrometry (AMS) radiocarbon measurements were made on 120 samples collected between Antarctica and South Africa along 30°E during the WOCE-France CIVA1 campaign in February 1993. Our principal objective was to complement the Southern Ocean's sparse existing data set in order to improve the 14 C benchmark used for validating ocean carbon-cycle models, which disagree considerably in this region. Measured 14 C is consistent with …
News from Cosquer Cave
Further work inside the Grotte Cosquer, the Palaeolithic painted cave near Marseilles only accessible by a deep-water dive, improves our knowledge and makes it clear there can be no artificial entrance made to create a dry-land access
Oceanic rock art
Rock art in an inland cave on the island of Lifou, New Caledonia, has been radiocarbon dated. A cluster of early paintings date to 2500 years ago, soon after the arrival of the first settlers, who must have quickly gone inland probably in pursuit of fresh water, available near the cave. They left their mark on the cave in the form of numerous hand stencils. During the first millennium AD, later generations of artists used the same cave, drawing b…
The Younger Dryas Cold Event—Was It Synchronous Over the North Atlantic Region
Determined independently from annually laminated ice cores and lake sediments, and German pines, the calendar ages of Younger Dryas (YD) boundaries significantly disagree with one another. 14 C dates, plotted vs. calendar ages for samples from different sediments, also reveal distinct offsets. The adjustment of varve chronologies to synchronize the boundaries of the YD nearly cancels the discrepancies between 14 C data, and supports the synchroni…
Oceanic Radiocarbon and Tritium On A Transect Between Australia and Bali (Eastern Indian Ocean)
Results are presented of radiocarbon and tritium measurements along a transect between the Australian continental shelf and the Indonesian coast of Bali. The stations lie in the easternmost part of the Indian Ocean, close to the sills over which the Indonesian throughflow (ITF) makes its way to the Indian Ocean. The present data, obtained as part of the Java-Australia Dynamics Experiment (JADE) in August 1989, complement the WOCE 14 C and tritium…
Radiocarbon Dating on Echo Micadas, Lsce, Gif-Sur-Yvette, France
The Laboratoire des Sciences du Climat et de l’Environnement (LSCE) has operated a radiocarbon dating laboratory for almost 70 years. It has evolved from a traditional ß-decay counting to an accelerator mass spectrometry facility. In 2015, the LSCE received a major upgrade with the installation of a MICADAS. This evolution required adjustments in sample preparation to match the new capability to date samples as small as a few tens of μgC. We summ…
Radiocarbon Chronology of Late Glacial and Holocene Sedimentation and Water-Level Changes in the Area of the Gościąż Lake Basin
We obtained 14 C ages on samples of lake marl and other sediments from cores taken in Gościąż Lake and its environs. Comparison of 14 C dates of bulk samples of laminated sediment with varve chronology and available AMS dates of terrestrial macrofossils indicates a reservoir correction of 2000 ± 120 yr for the basal series of lake sediments. 14 C dates obtained on peat layers underlying the oldest lacustrine sediments in Gościąż and other lakes c…
Seismic uplift of the harbour of ancient Aigeira, Central Greece
The Mavra Litharia cove, between Akrata and Derveni, in the North Peloponnesian coast (Central Greece), has been identified as the site of the harbour of the Hellenistic Aigeira, one of the very few natural harbours along the uplifting, fault-controlled North Peloponnesian coast. Geomorphological, marine biological and archaeological data as well as radiocarbon dating of marine fossils testify to a 2m relative land uplift since Hellenistic times …
AMS 14C Study of Transient Events and of the Ventilation Rate of the Pacific Intermediate Water During the Last Deglaciation
14 C analysis of monospecific samples of planktonic and benthic foraminifera were performed in deep-sea sediment cores from the Atlantic and Pacific Oceans by Accelerator Mass Spectrometry (AMS). These measurements demonstrate that the Younger Dryas cold event, first described in the north Atlantic, is also present at the same time in the north Pacific Ocean. The comparison of the 14 C ages of planktonic and benthic foraminifera from the same sed…
Measurement of 14 C Directly from CO 2 Using a Tandetron Accelerator Mass Spectrometer Facility
Tests have been carried out on the measurement of 14 C directly from CO 2 , using a source designed by Middleton, and a Tandetron accelerator mass spectrometer system. These tests were very promising from the point of view of minimum quantity of carbon necessary ( not memory effect) giving an equivalent age of ∼25,000 years. As a demonstration of the technique, a single thread from the mummy wrapping of the Egyptian king Ramses II was dated
Présentation de la datation 14C en spectrométrie de masse par accélérateur
Sea-Level Estimates during the Last Deglaciation Based on δ 18 O and Accelerator Mass Spectrometry 14 C Ages Measured in Globigerina bulloides
Coupled measurements of δ 18 O and accelerator mass spectrometry (AMS) 14 C in a particular species of planktonic foraminifera may be used to calculate sea-level estimates for the last deglaciation. Of critical importance for this type of study is a knowledge of the seasonality of foraminiferal growth, which can be provided by δ 18 O measurements of modern shells (core tops, plankton tows). Isotopic (δ 18 O, AMS- 14 C dating) and faunal records (…
AMS- 14 C Ages Measured in Deep Sea Cores from the Southern Ocean
14 C dates obtained by accelerator mass spectrometry (AMS) on monospecific foraminiferal samples from two deep-sea sediment cores raised in the Indian sector of the Southern Ocean have been corrected for the difference in 14 C composition between atmosphere and sea surface by using a reconstruction of the latitudinal 14 C gradient which existed in the Southern Ocean prior to 1962. The corrected AMS- 14 C data show a reduced sedimentation rate in …
Bomb 14C in the Indian Ocean Measured by Accelerator Mass Spectrometry
AMS 14 C measurements on samples collected in the tropical-equatorial Indian Ocean during the INDIGO program (leg II, 1986) are presented and compared with β-counting results obtained under both INDIGO program and GEOSECS expedition in the Indian Ocean (1978). The most significant observation is a doubling of the bomb- 14 C inventory and mean penetration depth in the equatorial zone. Based on hydrologic considerations, two hypotheses can be propo…
AMS 14C Study of Transient Events and of the Ventilation Rate of the Pacific Intermediate Water During the Last Deglaciation
14 C analysis of monospecific samples of planktonic and benthic foraminifera were performed in deep-sea sediment cores from the Atlantic and Pacific Oceans by Accelerator Mass Spectrometry (AMS). These measurements demonstrate that the Younger Dryas cold event, first described in the north Atlantic, is also present at the same time in the north Pacific Ocean. The comparison of the 14 C ages of planktonic and benthic foraminifera from the same sed…
C Dating with the Gif-sur-Yvette Tandetron Accelerator
The standard procedure for measuring 14 C at the Gif-sur-Yvette Tandetron AMS facility is described. A new sample manipulator and automated measurements are being used and have been operational for six months. Evidence of isotopic fractionation in the sputter ion source is provided. We take this into account by measuring the 13 C/ 12 C ratio of the sample in the accelerator
Des dates pour Niaux et Gargas
Clottes Jean, Valladas Hélène, Cachier Hélène, Arnold Maurice. Des dates pour Niaux et Gargas. In: Bulletin de la Société préhistorique française, tome 89, n°9, 1992. pp. 270-274
Possibilities for Reconstructing Radiocarbon Level Changes During the Late Glacial by Using a Laminated Sequence of Gościaż Lake
Laminated sediments of Gościaż Lake can be used as an independent source of material for calibrating the radiocarbon time scale. The varve chronology is based on three long cores from the deepest part of the lake, with one additional core from the second deepest part. From pollen and Cladocera spectra and stable isotope and chemical content sequences, we have determined the Allerød(AL)/Younger Dryas(YD) and Younger Dryas/Preboreal(PB) boundaries …
Seismic uplift of the harbour of ancient Aigeira, Central Greece
The Mavra Litharia cove, between Akrata and Derveni, in the North Peloponnesian coast (Central Greece), has been identified as the site of the harbour of the Hellenistic Aigeira, one of the very few natural harbours along the uplifting, fault-controlled North Peloponnesian coast. Geomorphological, marine biological and archaeological data as well as radiocarbon dating of marine fossils testify to a 2m relative land uplift since Hellenistic times …
Th- 234 U and 14 C Ages Obtained by Mass Spectrometry on Corals
In 1988, Fairbanks conducted a drilling expedition off the south coast of Barbados to recover submerged corals contemporaneous with the last deglaciation. Core recovery was excellent and >30 different samples were dated by conventional β-counting techniques (Fairbanks 1989). At about the same time, we developed, at Lamont, the thermal ionization mass spectrometry (TIMS) technique to obtain precise U-Th ages (Edwards 1988), and to compare them wit…
Radiocarbon Chronology of Late Glacial and Holocene Sedimentation and Water-Level Changes in the Area of the Gościąż Lake Basin
We obtained 14 C ages on samples of lake marl and other sediments from cores taken in Gościąż Lake and its environs. Comparison of 14 C dates of bulk samples of laminated sediment with varve chronology and available AMS dates of terrestrial macrofossils indicates a reservoir correction of 2000 ± 120 yr for the basal series of lake sediments. 14 C dates obtained on peat layers underlying the oldest lacustrine sediments in Gościąż and other lakes c…
The Younger Dryas Cold Event—Was It Synchronous Over the North Atlantic Region
Determined independently from annually laminated ice cores and lake sediments, and German pines, the calendar ages of Younger Dryas (YD) boundaries significantly disagree with one another. 14 C dates, plotted vs. calendar ages for samples from different sediments, also reveal distinct offsets. The adjustment of varve chronologies to synchronize the boundaries of the YD nearly cancels the discrepancies between 14 C data, and supports the synchroni…
Deglacial sea-level record from Tahiti corals and the timing of global meltwater discharge
Termination of the Last Glaciation in the Iberian Peninsula Inferred from the Pollen Sequence of Quintanar de la Sierra
A 4.5-m-thick late-glacial pollen sequence, supported by 17 AMS 14 C dates, has been investigated at the Quintanar de la Sierra marshland (Iberian cordillera, north-central Spain). Pollen zones were defined that correspond to successive phases in vegetation history during the end of the Late Würm, late-glacial interstade, and Younger Dryas periods. A transfer function approach has been adopted to derive quantitative climate estimates from the pol…
News from Cosquer Cave
Further work inside the Grotte Cosquer, the Palaeolithic painted cave near Marseilles only accessible by a deep-water dive, improves our knowledge and makes it clear there can be no artificial entrance made to create a dry-land access
Radiocarbon Calibration by Means of Mass Spectrometric 230 Th/ 234 U and 14 C Ages of Corals
As first shown by Bard et al. (1990a), high-precision 230 Th- 234 U ages can be used successfully to calibrate the radiocarbon time scale beyond the high-precision tree-ring calibration that now reaches 11,900 cal bp (Kromer and Spurk 1998). Using mass spectrometric techniques, we measured 14 C and 230 Th ages on new samples collected from boreholes drilled off the islands of Tahiti and Mururoa (French Polynesia) in order to complement the databa…
Oceanic Radiocarbon Between Antarctica and South Africa Along Woce Section 16 at 30°E
Accelerator mass spectrometry (AMS) radiocarbon measurements were made on 120 samples collected between Antarctica and South Africa along 30°E during the WOCE-France CIVA1 campaign in February 1993. Our principal objective was to complement the Southern Ocean's sparse existing data set in order to improve the 14 C benchmark used for validating ocean carbon-cycle models, which disagree considerably in this region. Measured 14 C is consistent with …
Datation de vestiges humains présumés du Paléolithique supérieur par la méthode du Carbone 14 en spectrométrie de masse par accélérateur / Accelerator mass spectrometry radiocarbon dates of human rema…
Cet article présente et discute les résultats de la datation directe de vestiges humains (Sud-Ouest de la France) présumés du Paléolithique supérieur par la méthode du carbone 14 en spectrométrie de masse par accélérateur (SMA). L'utilisation de cette méthode est souvent la seule solution pour replacer dans un cadre chronologique des vestiges humains dont l'attribution au Paléolithique supérieur repose sur des données peu fiables. Les résultats o…
Radiocarbon Calibration by Means of Varves Versus 14 C Ages of Terrestrial Macrofossils from Lake Gościąż and Lake Perespilno, Poland
This paper presents radiocarbon dates of terrestrial macrofossils from Lakes Gościąż and Perespilno, Poland. These data agree very well with most of the German pine calibration curve. In the Late Glacial, they generally agree with the data from Lake Suigetsu, Japan, and indicate constant or even increasing 14 C age between 12.9 and 12.7 ka BP, rapid decline of 14 C age around 12.6 ka BP, and a long plateau 10,400 14 C BP around 12 ka BP. Correlat…
Radiocarbon Reservoir Ages in the Mediterranean Sea and Black Sea
We measured apparent marine radiocarbon ages for the Mediterranean Sea, Black Sea, and Red Sea by accelerator mass spectrometry radiocarbon analyses of 26 modern, pre-bomb mollusk shells collected living between AD 1837 and 1950. The marine reservoir (R(t)) ages were estimated at some 390 ± 85 yr BP, 415 ± 90 yr BP and 440 ± 40 yr BP, respectively. R(t) ages in the Mediterranean Sea and Black Sea are comparable to those for the North Atlantic Oce…
Paired 14 C and 230 Th/U Dating of Surface Corals from the Marquesas and Vanuatu (Sub-Equatorial Pacific) in the 3000 to 15,000 Cal Yr Interval
Paired radiocarbon and 230 Th/U dating was performed on 13 surface corals from submerged reefs in the Marquesas and from raised terraces in Vanuatu. The absolute ages of the corals analyzed ranged from 3000 to 15,000 cal yr. Estimates of the difference between the absolute and 14 C ages of these corals are in agreement with previous determinations up until 11,500 cal yr. The resulting mean sea surface reservoir age R is determined at 390 ± 60 yr …
Oceanic Radiocarbon and Tritium On A Transect Between Australia and Bali (Eastern Indian Ocean)
Results are presented of radiocarbon and tritium measurements along a transect between the Australian continental shelf and the Indonesian coast of Bali. The stations lie in the easternmost part of the Indian Ocean, close to the sills over which the Indonesian throughflow (ITF) makes its way to the Indian Ocean. The present data, obtained as part of the Java-Australia Dynamics Experiment (JADE) in August 1989, complement the WOCE 14 C and tritium…
Bilan des datations carbone 14 effectuées sur des charbons de bois de la grotte Chauvet
After a brief presentation of the experimental protocols, this article discusses the results of the 14C dates obtained from charcoal specimens collected on the walls (drawings and torch-wipes) and on the ground of the Chauvet Cave. The dates, which are coherent, can be divided into two periods a few millennia apart: between 33000 and 29000 14C years BP (33 samples including the five parietal representations) and between 27000 and 24500 14 C years…
Oceanic rock art
Rock art in an inland cave on the island of Lifou, New Caledonia, has been radiocarbon dated. A cluster of early paintings date to 2500 years ago, soon after the arrival of the first settlers, who must have quickly gone inland probably in pursuit of fresh water, available near the cave. They left their mark on the cave in the form of numerous hand stencils. During the first millennium AD, later generations of artists used the same cave, drawing b…
Geology and Paleoclimatology Research (19 obras) · Geology (18 obras) · Radiocarbon dating (17 obras) · Geography (14 obras) · Paleontology (13 obras) · Holocene (12 obras) · Isotope Analysis in Ecology (11 obras) · Oceanography (9 obras) · Accelerator mass spectrometry (8 obras) · Archaeology (8 obras)