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

S.W. Leavitt, R. Kalin

Research output: Contribution to journalArticle

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.
LanguageEnglish
Pages792-797
Number of pages5
JournalRadiocarbon
Volume34
Issue number3
Publication statusPublished - 1992

Fingerprint

tree ring
chronology
Carbon Isotopes
Modems
Cellulose
Isotopes
Lakes
Wood
radiocarbon dating
physiological response
lake level
Cooling
Carbon
carbon isotope
cellulose
stable isotope
cooling
Temperature
creek
Ring

Keywords

  • radiocarbon
  • cellulose
  • wood
  • tree rings

Cite this

@article{fe9b282dc94b47509a26d66dd5d5137c,
title = "A new tree-ring width, delta-C-13 and C-14 investigation of the two creeks site",
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.",
keywords = "radiocarbon, cellulose, wood, tree rings",
author = "S.W. Leavitt and R. Kalin",
note = "14TH INTERNATIONAL RADIOCARBON CONF ( 14C14 ), TUCSON, AZ, MAY 20-24, 1991",
year = "1992",
language = "English",
volume = "34",
pages = "792--797",
journal = "Radiocarbon",
issn = "0033-8222",
number = "3",

}

A new tree-ring width, delta-C-13 and C-14 investigation of the two creeks site. / Leavitt, S.W.; Kalin, R.

In: Radiocarbon, Vol. 34, No. 3, 1992, p. 792-797.

Research output: Contribution to journalArticle

TY - JOUR

T1 - A new tree-ring width, delta-C-13 and C-14 investigation of the two creeks site

AU - Leavitt, S.W.

AU - Kalin, R.

N1 - 14TH INTERNATIONAL RADIOCARBON CONF ( 14C14 ), TUCSON, AZ, MAY 20-24, 1991

PY - 1992

Y1 - 1992

N2 - 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.

AB - 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.

KW - radiocarbon

KW - cellulose

KW - wood

KW - tree rings

M3 - Article

VL - 34

SP - 792

EP - 797

JO - Radiocarbon

T2 - Radiocarbon

JF - Radiocarbon

SN - 0033-8222

IS - 3

ER -