DOI: 10.1016/j.palaeo.2014.12.006
论文题名: Bacterial origin of iron-rich microspheres in Miocene mammalian fossils
作者: Pesquero M.D. ; Alcalá L. ; Bell L.S. ; Fernández-Jalvo Y.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2015
卷: 420 起始页码: 27
结束页码: 34
语种: 英语
英文关键词: Bacteria
; Bone diagenesis
; Iron microbial mineralization
; Spain
; Taphonomy
; Vertebrate Miocene site
英文摘要: In their taphonomic study of a Cretaceous dinosaur fossil from the Gobi desert (Mongolia), Kremer et al. (2012) noted that the histological sections of this fossil preserved within their core iron oxide microspheres containing carbonaceous matter. They interpreted the carbonaceous nature of these structures as organic matter and suggested a microbial origin (probably bacterial) for the structures. Microspheres, similar both in composition and shape, have been identified in fossils from Cerro de la Garita, a Miocene mammalian site in Teruel, Spain. In the latter case, compact bone was also attacked by terrestrially associated bacteria (microscopic focal destruction [MFD]) which were enriched in iron and gives support to the idea that bacteria acted as the biological agent for iron precipitation during soft tissue decomposition in the early stages of bone diagenesis. Subsequent diagenetic episodes of mineralization related to the environmental context differ between these two sites; calcite precipitation at the palaeo-lakeshore of Cerro de la Garita and calcite and gypsum in the Gobi desert study case of Kremer et al. (2012). If the microsphere is bacterial in origin, it may be a useful taphonomic indicator of terrestrial exposure within a transitional environment of land and water. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69040
Appears in Collections: 过去全球变化的重建
There are no files associated with this item.
作者单位: Fundación Conjunto Paleontológico de Teruel-Dinópolis, Avda. Sagunto s/n, Teruel, Spain; Centre for Forensic Research, School of Criminology, Simon Fraser University, Burnaby, BC, Canada; Museo Nacional de Ciencias Naturales (CSIC), C/ José Gutiérrez Abascal 2, Madrid, Spain
Recommended Citation:
Pesquero M.D.,Alcalá L.,Bell L.S.,et al. Bacterial origin of iron-rich microspheres in Miocene mammalian fossils[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2015-01-01,420