scholarly journals Temple University Radiocarbon Dates I

Radiocarbon ◽  
1979 ◽  
Vol 21 (3) ◽  
pp. 472-476 ◽  
Author(s):  
Koneta Eldridge
Keyword(s):  
Late Pleistocene ◽  
Radiocarbon Dating ◽  
Radiocarbon Dates ◽  
Main Campus ◽  
Temple University ◽  
Support Research

Temple's radiocarbon dating facility is housed in the Department of Geology on the Main Campus. The laboratory was established to support research in late Pleistocene and Holocene Geology, Archaeology, and Anthropology.

scholarly journals University of Miami Radiocarbon Dates I

Radiocarbon ◽  
1974 ◽  
Vol 16 (3) ◽  
pp. 402-408 ◽  
Author(s):  
J J Stipp ◽  
K L Eldridge ◽  
S J Cohen ◽  
K Webber
Keyword(s):  
Radiocarbon Dating ◽  
Age Dating ◽  
Marine Geology ◽  
Radiocarbon Dates ◽  
Main Campus ◽  
The Caribbean ◽  
University Of Miami ◽  
Support Research ◽  
Teaching Facility

The radiocarbon dating facility is part of the UM Geochronology laboratory housed in the Department of Geology, University of Miami, Main Campus. The laboratory was established to carry out and support research in Pleistocene marine geology, particularly in the Caribbean, and to act as a specialized teaching facility of geochronologic research using radiometric age dating techniques.

Direct Radiocarbon Dating of Late Pleistocene Hominids in Eurasia: Current Status, Problems, and Perspectives

Radiocarbon ◽  
2014 ◽  
Vol 56 (02) ◽  
pp. 753-766 ◽  
Author(s):  
Yaroslav V Kuzmin ◽  
Susan G Keates
Keyword(s):  
Late Pleistocene ◽  
Radiocarbon Dating ◽  
C:N Ratio ◽  
Human Remains ◽  
Current Status ◽  
Modern Humans ◽  
Radiocarbon Dates ◽  
Selection Of

The corpus of radiocarbon dates run directly on Pleistocene-age human remains in Eurasia (∼120 values, with ∼80 of them found to be reliable) is analyzed and interpreted. The latest Neanderthals are dated to ∼34,000–30,500 BP (∼38,800–35,400 cal BP). They probably coexisted with the first modern humans at ∼36,200–30,200 BP (∼42,500–32,800 cal BP) in the western and central parts of Europe. The earliest direct14C dates on modern humans in Eurasia are ∼34,950–33,300 BP (∼40,400–37,800 cal BP). A paucity of14C dates corresponding to the LGM is evident for Europe, but Asia perhaps had larger populations during this timespan. The main criteria for the selection of bone/tooth material for direct14C dating as now widely accepted are (1) the collagen yield (generally, 1% or more) and (2) the C:N ratio (within the 2.9–3.4 range).

New Radiocarbon Dates from Nasera Rockshelter (Tanzania): Implications for Studying Spatial Patterns in Late Pleistocene Technology

2018 ◽  
Vol 16 (2) ◽  
pp. 211-222 ◽  
Author(s):  
Kathryn Ranhorn ◽  
Christian A. Tryon
Keyword(s):  
Spatial Patterns ◽  
Late Pleistocene ◽  
Radiocarbon Dating ◽  
Lithic Technology ◽  
Eastern Africa ◽  
Regional Pattern ◽  
Radiocarbon Dates ◽  
North Central ◽  
Dating Methods ◽  
Site Variability

AbstractLate Pleistocene and Holocene evidence from multiple rockshelters in north-central Tanzania suggests a regional pattern of changing technological behaviors through time. We use independent chronological evidence to test if the proposed technological patterns across space were also temporally equivalent. We applied AMS radiocarbon dating methods to the carbonate fraction of five ostrich eggshell fragments from Mehlman’s 1975-1976 excavations at Nasera rockshelter and compared our results to recent re-dating efforts of Mumba rockshelter. We document radiocarbon results >46 ka at Nasera in Level 5, indicating that associated and underlying technologies (including what Mehlman termed the ‘Nasera Industry’) are older than previously documented. Backed pieces first appear >46 ka at Nasera, which is in accordance with recent evidence from nearby rockshelters like Enkapune ya Muto, Panga ya Saidi, and potentially Kisese II. We also provide an age of 11,260-11,710 calBP for the ‘Silale Industry’ of Level 3B. Overall, the shifts in lithic technology previously considered to be shared between Mumba and Nasera rockshelters are not temporally aligned, emphasizing the possibility that intra-site variability was the norm throughout the Late Pleistocene in eastern Africa.

Direct Radiocarbon Dating of Late Pleistocene Hominids in Eurasia: Current Status, Problems, and Perspectives

Radiocarbon ◽  
2014 ◽  
Vol 56 (2) ◽  
pp. 753-766 ◽  
Author(s):  
Yaroslav V Kuzmin ◽  
Susan G Keates
Keyword(s):  
Late Pleistocene ◽  
Radiocarbon Dating ◽  
C:N Ratio ◽  
Human Remains ◽  
Current Status ◽  
Modern Humans ◽  
Radiocarbon Dates ◽  
Selection Of

The corpus of radiocarbon dates run directly on Pleistocene-age human remains in Eurasia (∼120 values, with ∼80 of them found to be reliable) is analyzed and interpreted. The latest Neanderthals are dated to ∼34,000–30,500 BP (∼38,800–35,400 cal BP). They probably coexisted with the first modern humans at ∼36,200–30,200 BP (∼42,500–32,800 cal BP) in the western and central parts of Europe. The earliest direct 14C dates on modern humans in Eurasia are ∼34,950–33,300 BP (∼40,400–37,800 cal BP). A paucity of 14C dates corresponding to the LGM is evident for Europe, but Asia perhaps had larger populations during this timespan. The main criteria for the selection of bone/tooth material for direct 14C dating as now widely accepted are (1) the collagen yield (generally, 1% or more) and (2) the C:N ratio (within the 2.9–3.4 range).

scholarly journals Reference sections of late‒middle neopleistocene friable sediments in Kamchatka: Present-day state and issue of age, and perspectives of study

2019 ◽  
Vol 1 (1) ◽  
pp. 60-89
Author(s):  
M. M. Pevzner ◽  
O. V. Yashina ◽  
O. I. Smyshlyaeva ◽  
R. I. Nechushkin ◽  
T. D. Karimov ◽  
...  
Keyword(s):  
Late Pleistocene ◽  
Organic Material ◽  
Radiocarbon Dating ◽  
Middle Pleistocene ◽  
Radiocarbon Dates ◽  
Russian Academy Of Sciences ◽  
Reference Sections ◽  
Quality Check ◽  
New Interpretation ◽  
Academy Of Sciences

Reference sections of friable sediments in central Kamchatka are studied and their present-day state is described. Previous concepts of the Middle Pleistocene age of these sediments are critically examined. Radiocarbon dates performed in the 1980s‒1990s by researchers at the Geological Institute, Russian Academy of Sciences, are revised. It is shown that some (oldest) part of dates did not pass the quality check. Results of the new (2016‒2017) radiocarbon dating agree well with the data accomplished previously and supported later by revision. Based on the combined databank with 65 determinations of different species of the buried organic material and mammal bones, the Late Pleistocene age of sediments is suggested. A new interpretation is proposed for the formation setting of some sequences in the studied sections.

scholarly journals Calibration of Radiocarbon Dates for the Late Pleistocene Using U/Th Dates on Stalagmites

Radiocarbon ◽  
1997 ◽  
Vol 39 (1) ◽  
pp. 27-32 ◽  
Author(s):  
John C. Vogel ◽  
Joel Kronfeld
Keyword(s):  
South Africa ◽  
Magnetic Dipole ◽  
Satisfactory Agreement ◽  
Late Pleistocene ◽  
Calibration Curve ◽  
Dipole Field ◽  
Radiocarbon Dates ◽  
The Past ◽  
The Earth ◽  
Magnetic Dipole Field

Twenty paired 14C and U/Th dates covering most of the past 50,000 yr have been obtained on a stalagmite from the Cango Caves in South Africa as well as some additional age-pairs on two stalagmites from Tasmania that partially fill a gap between 7 ka and 17 ka ago. After allowance is made for the initial apparent 14C ages, the age-pairs between 7 ka and 20 ka show satisfactory agreement with the coral data of Bard et al. (1990, 1993). The results for the Cango stalagmite between 25 ka and 50 ka show the 14C dates to be substantially younger than the U/Th dates except at 49 ka and 29 ka, where near correspondence occurs. The discrepancies may be explained by variations in 14C production caused by changes in the magnetic dipole field of the Earth. A tentative calibration curve for this period is offered.

Calibrated Radiocarbon Dating at Keatley Creek: The Chronology of Occupation at a Complex Hunter-Gatherer Village

2003 ◽  
Vol 68 (4) ◽  
pp. 719-735 ◽  
Author(s):  
William C. Prentiss ◽  
Michael Lenert ◽  
Thomas A. Foor ◽  
Nathan B. Goodale ◽  
Trinity Schlegel
Keyword(s):  
British Columbia ◽  
Radiocarbon Dating ◽  
Climatic Factors ◽  
Climatic Warming ◽  
Radiocarbon Dates ◽  
Population Aggregation ◽  
Selective Environment

This paper provides an analysis of radiocarbon dates acquired during earlier and recent field seasons at the Keatley Creek site, southern British Columbia. Results indicate that early occupations predating 1900 cal. B.P. occurred, but were not likely associated with population aggregation and large housepits. The aggregated village appears to have emerged by approximately 1700 cal. B.P. and was abandoned at approximately 800 cal. B.P. A break in the occupational sequence is recognized at 1450-1350 cal. B.P. and one other short break may have occurred shortly after 1250 cal. B.P. Peak socioeconomic complexity appears to have been achieved between 1350 and 800 cal B.P. Climatic warming may have provided a selective environment favoring population aggregation and intensification during this time. The final abandonment of the Keatley Creek village appears to have been part of a regional phenomenon suggesting the possibility that climatic factors were important in this case as well.

scholarly journals Paleoclimatic Implications of Radiocarbon Dating Of Speleothems from the Cracow-Wieluń Upland, Southern Poland

Radiocarbon ◽  
1995 ◽  
Vol 37 (2) ◽  
pp. 103-110 ◽  
Author(s):  
Anna Pazdur ◽  
Mieczysław F. Pazdur ◽  
Jacek Pawlyta ◽  
Andrzej Górny ◽  
Michał Olszewski
Keyword(s):  
Systematic Study ◽  
Radiocarbon Dating ◽  
Karst Region ◽  
Radiocarbon Dates ◽  
Preliminary Results ◽  
Last Glaciation ◽  
Geological Museum ◽  
Paleoclimatic Records ◽  
Age Range

We report preliminary results of a long-term systematic study intended to gather paleoclimatic records from precisely dated speleothems. The research project is limited to speleothems deposited in caves of the Cracow-Wieluń Upland, the largest and best-explored karst region in Poland, covering ca. 2900 km2 with >1000 caves. Speleothem samples were selected from collections of the Geological Museum of the Academy of Mining and Metallurgy in Cracow. Radiocarbon dates of these samples from ca. 45–20 ka bp almost exactly coincide with age range of the Interplenivistulian. A break in speleothem formation between ca. 20 and 10 ka bp may be interpreted as a result of serious climatic deterioration associated with the maximum extent of the last glaciation. We observed differences among 14C, U/Th and AAR dating results. Changes of δ13C and δ18O in speleothems that grew between ca. 30 and 20 ka bp may be interpreted as changes of paleoclimatic conditions.

Radiocarbon dates from Fazzan, southern Libya

2002 ◽  
Vol 33 ◽  
pp. 9-19 ◽  
Author(s):  
David Mattingly ◽  
David Edwards ◽  
John Dore
Keyword(s):  
Radiocarbon Dating ◽  
Short Paper ◽  
Important Conclusion ◽  
Historic Period ◽  
Radiocarbon Dates ◽  
Full List ◽  
Ams Dating ◽  
The 1960S ◽  
Early Islamic

AbstractThis short paper presents a full list of the currently available radiocarbon dates from the work of Charles Daniels in the 1960s-1970s and the Fazzan Project (1997-2001). The dates can be grouped into several categories, by site or area, and demonstrate the potential of radiocarbon dating being applied to historic-period archaeology in the Sahara. This complements earlier Italian work on later prehistory. One of the most important conclusions to emerge is that the construction of castle-like buildings in Fazzan began within the Garamantian period and that some of the numerous well-preserved mudbrick fortified sites are thus rather earlier than has previously been envisaged. A second important conclusion is that the use of AMS dating can help to identify and confirm activity of the post-Garamantian and early Islamic phases, which has hitherto been elusive.

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