Picture of person typing on laptop with programming code visible on the laptop screen

World class computing and information science research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by researchers from the Department of Computer & Information Sciences involved in mathematically structured programming, similarity and metric search, computer security, software systems, combinatronics and digital health.

The Department also includes the iSchool Research Group, which performs leading research into socio-technical phenomena and topics such as information retrieval and information seeking behaviour.

Explore

A new tree-ring width, delta-C-13 and C-14 investigation of the two creeks site

Leavitt, S.W. and Kalin, R. (1992) A new tree-ring width, delta-C-13 and C-14 investigation of the two creeks site. Radiocarbon, 34 (3). pp. 792-797. ISSN 0033-8222

Full text not available in this repository. Request a copy from the Strathclyde author

Abstract

We have made isotopic and dendrochronologic measurements on material collected from the Two Creeks site. Radiocarbon dating of outside wood of four logs yielded an average age of 11,760 +/- 100 BP, in good agreement with results of Broecker and Farrand (1963) over 25 years ago. The range of 11,640 +/- 160 to 11,900 +/- 160 BP suggests a period of forest growth of 200-300 years, consistent with a ring-width chronology established by Kaiser (1987). Ring counting of five specimens gave a range of individual tree ages from 110 to 182 years, and width measurements indicate very low year-to-year variation in ring size. However, preliminary cross-dating of five samples produced a 202-year floating chronology. Stable-carbon isotope chronologies on cellulose from five-year ring groups show deltaC-13 scatter among trees typical of that found within modem sites, with some matches of isotopic maxima and minima. Some downward deltaC-13 trends may result from physiological response to rising lake levels (and/or cooling temperatures) at the site, which also produced very narrow rings in the outer ca. 50 +/- 20 years.