DOI: 10.1016/j.palaeo.2013.06.005
论文题名: Fossil Equisetum from the Lower Cretaceous in Jiuquan Basin, Gansu, Northwest China and its paleoclimatic significance
作者: Sun B.-N. ; Du B.-X. ; Ferguson D.K. ; Chen J.-L. ; He Y.-L. ; Wang Y.-D.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2013
卷: 385 起始页码: 202
结束页码: 212
语种: 英语
英文关键词: Equisetum
; Fossil plants
; Jiuquan Basin
; Paleoclimate
; The Early Cretaceous
; Tubers
英文摘要: Tubers of Equisetum are described for the first time from the Lower Cretaceous Zhonggou Formation, Jiuquan Basin, Gansu Province, Northwest China. The fossils are preserved as rows of 2-3 tubers. The tubers are elliptical, ovate and more or less rounded, the most distal one being mucronate, with some ridges on the surface of the tubers. According to the similarity of the morphology and arrangement with extant Equisetum subgenus Equisetum, the present fossils are assigned to a new species of Equisetum. Furthermore, the cellular details of the tubers are clearly revealed for the first time. And the cellular morphology of extant Equisetum tubers can be compared to those of the fossil species. The occurrence of Equisetum would suggest a wet habitat, and the presence of tubers implies that burial occurred during the late fall or winter. Based on the palynological assemblages and mega-fossil assemblages, it had been thought that in the Early Cretaceous the Jiuquan Basin was arid, but the living habitat of Equisetum indicates a wet, riparian environment. Therefore, the occurrence of fossil Equisetum associated with fishes and ostracodes in the lower sequence would suggest a locally wet environment, probably a lake-shore in an arid region during the late Early Cretaceous in the Jiuquan Basin. The study is of great significance for further interpretation of the paleoclimate and environment in the Early Cretaceous of Northwest China. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69704
Appears in Collections: 过去全球变化的重建
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作者单位: Key Laboratory of Mineral Resources in Western China (Gansu Province), Lanzhou University, Lanzhou 730000, China; School of Earth Science, Lanzhou University, Lanzhou 730000, China; Department of Paleontology, University of Vienna, A-1090 Vienna, Austria; Nanjing Institute of Geology and Paleontology, Nanjing 210008, China
Recommended Citation:
Sun B.-N.,Du B.-X.,Ferguson D.K.,et al. Fossil Equisetum from the Lower Cretaceous in Jiuquan Basin, Gansu, Northwest China and its paleoclimatic significance[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2013-01-01,385