Analog Morphocorrelation: New Technique with Implications for High-Resolution Absolute Age Dating: ABSTRACT

AAPG Bulletin ◽  
1986 ◽  
Vol 70 ◽  
Author(s):  
Anthony J. Arnold, William C. Parke
Radiocarbon ◽  
2020 ◽  
pp. 1-10
Author(s):  
Marek Krąpiec ◽  
Andrzej Rakowski ◽  
Jacek Pawlyta ◽  
Damian Wiktorowski ◽  
Monika Bolka

ABSTRACT Radiocarbon (14C) analyses are commonly used to determine the absolute age of floating tree-ring chronologies. At best, with the wiggle-matching method, a precision of 10 years could be achieved. For the early Middle Ages, this situation has been markedly improved by the discovery of rapid changes in atmospheric 14C concentrations in tree-rings dated to 774/775 and 993/994 AD. These high-resolution changes can be used to secure other floating tree-ring sequences to within 1-year accuracy. While a number of studies have used the 774 even to secure floating tree-ring sequences, the less abrupt 993 event has not been so well utilized. This study dates a floating pine chronology from Ujście in Wielkopolska (Greater Poland) (NW Poland), which covers the 10th century period and is critical for studies on the beginning of the Polish State to the calendar years 859–1085 AD using the changes in single year radiocarbon around 993/4 AD.


Palaios ◽  
1986 ◽  
Vol 1 (2) ◽  
pp. 183 ◽  
Author(s):  
William C. Parker ◽  
Anthony J. Arnold ◽  
William A. Berggren

1983 ◽  
Vol 31 (7) ◽  
pp. 964-966
Author(s):  
G Pradal ◽  
P Barriere ◽  
F Mollat ◽  
G Lefranc

Ultrathin sections are stained immediately after cutting by placing them in contact with staining solution and then placed on a slide covered by a celloidin film. This method largely avoids precipitates of heavy metals. The recovering of celloidin film is improved using a stainless steel basket. This technique is far more reliable than that involving use of a filter paper.


1987 ◽  
Vol 27 (1) ◽  
pp. 1-29 ◽  
Author(s):  
Douglas G. Martinson ◽  
Nicklas G. Pisias ◽  
James D. Hays ◽  
John Imbrie ◽  
Theodore C. Moore ◽  
...  

AbstractUsing the concept of “orbital tuning”, a continuous, high-resolution deep-sea chronostratigraphy has been developed spanning the last 300,000 yr. The chronology is developed using a stacked oxygen-isotope stratigraphy and four different orbital tuning approaches, each of which is based upon a different assumption concerning the response of the orbital signal recorded in the data. Each approach yields a separate chronology. The error measured by the standard deviation about the average of these four results (which represents the “best” chronology) has an average magnitude of only 2500 yr. This small value indicates that the chronology produced is insensitive to the specific orbital tuning technique used. Excellent convergence between chronologies developed using each of five different paleoclimatological indicators (from a single core) is also obtained. The resultant chronology is also insensitive to the specific indicator used. The error associated with each tuning approach is estimated independently and propagated through to the average result. The resulting error estimate is independent of that associated with the degree of convergence and has an average magnitude of 3500 yr, in excellent agreement with the 2500-yr estimate. Transfer of the final chronology to the stacked record leads to an estimated error of ±1500 yr. Thus the final chronology has an average error of ±5000 yr.


2018 ◽  
Author(s):  
Theresa Halligan ◽  
◽  
Cinzia Cervato ◽  
Charles Kerton ◽  
Diana L. Thatcher ◽  
...  

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