Absolute dating by uranium series disequilibrium of bones from the cave of La Chaise-de-Vouthon (Charente), France

1987 ◽  
Vol 12 (5) ◽  
pp. 543-550 ◽  
Author(s):  
Angela M. Rae ◽  
Miro Ivanovich ◽  
Henry P. Schwarcz
Keyword(s):  
Uranium Series ◽  
Absolute Dating

scholarly journals Radiometric Dating of Young and Old Calcrete

Radiocarbon ◽  
1997 ◽  
Vol 40 (2) ◽  
pp. 795-802 ◽  
Author(s):  
Mebus A. Geyh ◽  
Bernhard Eitel
Keyword(s):  
The Other ◽  
Radiometric Dating ◽  
Host Material ◽  
Very Old ◽  
Uranium Series ◽  
Dating Methods ◽  
Absolute Dating ◽  
Independent Technique ◽  
Radiometric Ages ◽  
The Relationship

To obtain a better understanding of the relationship between calcrete genesis and the results of different absolute dating methods, thermoluminescence (TL), radiocarbon (14C) and uranium/thorium (U/Th) were applied to coeval sample; take from a very young calcrete profile in Namibia. The methodically different ages reflect the characteristics of the applied dating methods, the genetics of calcrete and different events of calcrete genesis. The conventional 14C ages and the TL dates cover the last 50 ka, while the corresponding U/Th dates of coeval samples are many times larger, Uranium-series dates are not related to the deposition of the host material or to its cementation if the ages are smaller than ca. 120 ka. The TL clock is set to zero during eolian transport and the corresponding radiometric ages of the quartz and feldspar grains date the time of their deposition. The 14C ages of the cement correspond, on the other hand, to a time shortly after the onset of the cementation and long before its termination. In the case of very old calcrete, the mixture of young and old cement results in ambiguous ages if they cannot be confirmed by an independent technique.

Radiometric dating of hillslope calcrete in the Negev Desert, Israel

2008 ◽  
Vol 104 (11/12) ◽  
Author(s):  
J.C. Vogel ◽  
M.A. Geyh
Keyword(s):  
Open System ◽  
Negev Desert ◽  
Radiometric Dating ◽  
Jordan Valley ◽  
Partial Recrystallization ◽  
Uranium Series ◽  
Uranium Series Dating

The radiometric dating of calcrete is often problematical because impurities and open system conditions affect the apparent ages obtained. By applying both radiocarbon and uranium-series dating to calcrete in colluvium, it is shown that such conditions can be identified. In correlation with the stratigraphy, it is found that partial recrystallization severely decreases the radiocarbon ages of the upslope and shallower samples further down, whereas incorporation of limestone fragments from bedrock significantly increases the apparent ages of some of the uranium-series samples. It is concluded that the hillslope calcrete at the study site near Sede Beker in the Negev Desert, Israel, mainly developed shortly after 40 kyr ago, at a time when the Jordan Valley was being inundated to form the fossil Lake Lisan. Since their formation would have required higher rainfall than today, the results provide further evidence that the whole region was experiencing an increase in precipitation.

Digging the history. Absolute chronology of the settlement complex at Czermno-Cherven’ (eastern Poland). Research status and perspectives

2020 ◽  
Vol 72 (2) ◽  
Author(s):  
Tomasz Dzieńkowski ◽  
Marcin Wołoszyn ◽  
Iwona Florkiewicz ◽  
Radosław Dobrowolski ◽  
Jan Rodzik ◽  
...  
Keyword(s):  
Interdisciplinary Research ◽  
Qualitative Change ◽  
Archaeological Research ◽  
Research Status ◽  
History Of ◽  
Absolute Dating ◽  
First Time ◽  
Radiocarbon Datings

The article discusses the results of the latest interdisciplinary research of Czermno stronghold and its immediate surroundings. The site is mentioned in chroniclers’ entries referring to the stronghold Cherven’ (Tale of Bygone Years, first mention under the year 981) and the so-called Cherven’ Towns. Given the scarcity of written records regarding the history of today’s Eastern Poland, Ukraine, and Belarus in the 10th and 11th centuries, recent archaeological research, supported by geoenvironmental analyses and absolute dating, brought a significant qualitative change. In 2014 and 2015, the remains of the oldest rampart of the stronghold were uncovered for the first time. A series of radiocarbon datings allows us to refer the erection of the stronghold to the second half/late 10th century. The results of several years’ interdisciplinary research (2012-2020) introduce qualitatively new data to the issue of the Cherven’ Towns, which both change current considerations and confirm the extraordinary research potential in the archeology of the discussed region.

scholarly journals Oldest cave art found in Sulawesi

2021 ◽  
Vol 7 (3) ◽  
pp. eabd4648
Author(s):  
Adam Brumm ◽  
Adhi Agus Oktaviana ◽  
Basran Burhan ◽  
Budianto Hakim ◽  
Rustan Lebe ◽  
...  
Keyword(s):  
Rock Art ◽  
Karst Area ◽  
Uranium Series ◽  
Island Southeast Asia ◽  
South Sulawesi ◽  
Figurative Painting ◽  
Uranium Series Dating ◽  
Cave Paintings ◽  
Minimum Age ◽  
Cave Art

Indonesia harbors some of the oldest known surviving cave art. Previously, the earliest dated rock art from this region was a figurative painting of a Sulawesi warty pig (Sus celebensis). This image from Leang Bulu’ Sipong 4 in the limestone karsts of Maros-Pangkep, South Sulawesi, was created at least 43,900 years ago (43.9 ka) based on Uranium-series dating. Here, we report the Uranium-series dating of two figurative cave paintings of Sulawesi warty pigs recently discovered in the same karst area. The oldest, with a minimum age of 45.5 ka, is from Leang Tedongnge. The second image, from Leang Balangajia 1, dates to at least 32 ka. To our knowledge, the animal painting from Leang Tedongnge is the earliest known representational work of art in the world. There is no reason to suppose, however, that this early rock art is a unique example in Island Southeast Asia or the wider region.

scholarly journals Insights into the Galápagos plume from uranium-series isotopes of recently erupted basalts

2011 ◽  
Vol 12 (9) ◽  
pp. n/a-n/a ◽  
Author(s):  
Heather K. Handley ◽  
Simon Turner ◽  
Kim Berlo ◽  
Christoph Beier ◽  
Alberto E. Saal
Keyword(s):  
Uranium Series ◽  
Galapagos Plume

scholarly journals The Frontiers of Uranium-series Research

Eos ◽  
2014 ◽  
Vol 95 (21) ◽  
pp. 178-178
Author(s):  
Heather Handley ◽  
Simon Turner
Keyword(s):  
Uranium Series

Quaternary Hypsithermals

1972 ◽  
Vol 2 (3) ◽  
pp. 270-273 ◽  
Author(s):  
Cesare Emiliani
Keyword(s):  
High Temperature ◽  
Deep Sea ◽  
Isotopic Analysis ◽  
The Past ◽  
Absolute Dating ◽  
Oxygen Isotopic ◽  
Environmental Balance ◽  
Past Half ◽  
Oxygen Isotopic Analysis

Oxygen isotopic analysis and absolute dating of deep-sea cores show that temperatures as high as those of today occurred for only about 10% of the time during the past half million years. The shortness of the high temperature intervals (“hypsithermals”) suggests a precarious environmental balance, a condition which makes man's interference with the environment during the present hypsithermal extremely critical. This precarious balance must be stabilized if a new glaciation or total deglaciation is to be avoided.

Progress on absolute dating of ice cores with Argon isotopes

2021 ◽  
Author(s):  
Anais Orsi ◽  
Ilaria Crotti ◽  
Roxanne Jacob ◽  
Amaelle Landais ◽  
Elise Fourré
Keyword(s):  
Ice Core ◽  
Ice Cores ◽  
Significant Advance ◽  
Large Sample Size ◽  
Argon Isotopes ◽  
Absolute Dating ◽  
Dating Method ◽  
A New Technique ◽  
Ice Core Dating ◽  
Key Parameter

<p>In the search for very old ice, finding the age of the ice is a key parameter necessary for its interpretation. Most ice core dating method are based on chronological markers that require the ice to be in stratigraphic order. However, the oldest ice is likely to be found at the bottom of ice sheets, where the stratigraphy is disturbed, or in ablation areas, where the classical methods cannot be used. Absolute dating techniques have recently been developed to provide new constraints on the age of old ice, but their development in the context of ice cores is limited by the large sample size required. Here, we discuss the analytical performances of a new technique for 40Ar dating, which allows us to provide a reliable age with 80g of ice rather than 800g, as previously published. We present an application to the dating of the bottom of the TALDICE and Dome C ice cores. This method represents a significant advance for its application to the very precious ice at the bottom of ice cores.</p>

Sign in / Sign up

Export Citation Format

Share Document