DOI: 10.1016/j.palaeo.2015.12.023
论文题名: Dendrochronology and middle Miocene petrified oak: Modern counterparts and interpretation
作者: Wright W.E. ; Baisan C. ; Streck M. ; Wright W.W. ; Szejner P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 445 起始页码: 38
结束页码: 49
语种: 英语
英文关键词: Coexistence approach
; Dendrochronology
; Middle Miocene climate transition
; Palaeoclimate
; Petrified wood
英文摘要: This study reports the first successful statistical 'crossdating' among many ring width time series from petrified wood, thus providing a replicable continuous annual resolution window into tree growth and environmental influences during the middle Miocene. The petrified samples, of the genus Quercus, originated at the Stinking Water (SW) locality in Oregon, a Miocene-aged exposure associated with the Columbia River Basalts. 40AR/39AR dating on pillow basalt from the locality yielded a weighted Plateau Age of 13.79±0.09Ma placing the death of the trees at the end of the Langhian Stage of the Middle Miocene (15.97±0.05 to 13.65±0.05Ma), during the middle Miocene Climate Transition (MMCT). Ring width time series from 26 radii, 17 different trees, show significant intercorrelation. A Modified Coexistence Approach was applied to determine the likely climate range when the SW trees were growing. The modified approach included regression of site-mean ring width time series statistic values on estimated soil moisture for the site locations, using site-mean data from 126 modern Quercus sites from across the United States. Identification of highly significant linearities indicated strong relationships between ring width intercorrelation and soil moisture and ring width variability and soil moisture. Comparison of individual modern site-mean statistical values with values calculated for the SW locality suggests a mesic growing environment for the SW Quercus, with moderate temperatures. Geographic placement of modern Quercus sites with site-mean statistics similar to the SW values indicates a modern analogue in the eastern United States. Modern distributions of mesic species in the genera present at the SW locality suggest similarities with the central and southern Appalachian Mountains and the Ozark/Ouachita Mountains, indicating a mean annual temperature range of ≅10 °C to ≅15 °C and a mean annual precipitation range of ≅750 mm to ≅1200 mm when the SW Quercus were growing. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68571
Appears in Collections: 过去全球变化的重建
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作者单位: Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, United States; Department of Geology, Portland State University, Portland, OR, United States; Brea, CA, United States
Recommended Citation:
Wright W.E.,Baisan C.,Streck M.,et al. Dendrochronology and middle Miocene petrified oak: Modern counterparts and interpretation[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,445