DOI: 10.1016/j.palaeo.2013.08.013
论文题名: New Paleogene paleoclimate analysis of western Washington using physiognomic characteristics from fossil leaves
作者: Breedlovestrout R.L. ; Evraets B.J. ; Parrish J.T.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 392 起始页码: 22
结束页码: 40
语种: 英语
英文关键词: Chuckanut
; CLAMP
; LMA
; Manastash
; Paleogene
; Washington
英文摘要: The Chuckanut and Manastash formations were deposited in a lowland fluvial environment in western Washington during the Paleocene-Eocene. We provide a thorough paleotemperature analysis using the physiognomic characteristics from the fossil dicotyledonous leaves from these formations using two techniques, Leaf Margin Analysis (LMA) and Climate Leaf Analysis Multivariate Program (CLAMP). This work differs from previous analyses by 1) analyzing more localities and including the assessment of the never-before described Taneum Ridge Body and Manastash Main Body within the Manastash Formation and the Maple Falls Member of the Chuckanut Formation, and 2) using two different techniques to decipher mean annual temperatures through time. In this study, mean annual temperatures (MAT) were determined from 125 distinct morphotypes and are several degrees higher at each locality than previously reported. MAT values derived from LMA ranged from 17.0° to 28.8. °C for the lowermost and 13.4° to 19.5. °C for the uppermost Chuckanut Formation. The Manastash Formation had MATs ranging from 17.1. °C to 29.1. °C. Using CLAMP, paleotemperatures ranged from 15.3° to 19.4. °C for the lowermost and 12.3° to 15.6. °C for the uppermost Chuckanut Formation and 15.8 to 21.3. °C for the Manastash Formation. These data are compared to other Eocene-Paleocene formations in the western US; the Chuckanut and Manastash formations record some of the warmest paleotemperatures in the Paleogene in the western US because of their low-elevation locations. These paleotemperatures may reflect the terrestrial signal of paleoclimate optima defined in marine rocks during the Paleocene-Eocene. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69548
Appears in Collections: 过去全球变化的重建
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作者单位: ExxonMobil Exploration Co., 233 Benmar Drive, Houston, TX 77060, United States; ConocoPhillips, 600 N. Dairy Ashford Rd, Houston, TX 77079, United States; University of Idaho, Department of Geological Sciences, PO Box 443022, Moscow, ID 83844-3022, United States
Recommended Citation:
Breedlovestrout R.L.,Evraets B.J.,Parrish J.T.. New Paleogene paleoclimate analysis of western Washington using physiognomic characteristics from fossil leaves[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,392