DOI: 10.1016/j.gloplacha.2020.103124
论文题名: Revising the timing and causes of the Urgonian rudistid-platform demise in the Mediterranean Tethys
作者: Frau C. ; Tendil A.J.-B. ; Pohl A. ; Lanteaume C.
刊名: Global and Planetary Change
ISSN: 9218181
出版年: 2020
卷: 187 语种: 英语
英文关键词: Aptian
; Barremian
; Mediterranean Tethys
; Oceanic Anoxic Event 1a
; Sea level
; Urgonian platforms
Scopus关键词: Ecosystems
; Geodynamics
; Timing circuits
; Aptian
; Barremian
; Mediterranean Tethys
; Oceanic Anoxic Event
; Urgonian platforms
; Sea level
; ammonite
; anoxic conditions
; Aptian
; Barremian
; biostratigraphy
; chronology
; geodynamics
; hiatus
; sea level change
; Tethys
; Ammonoidea
; Caprinidae
英文摘要: The widespread demise of the Urgonian rudistid-platform ecosystem in the Mediterranean Tethys was so far considered as a progressive phenomenon starting at the Barremian–Aptian transition and culminating in the mid-early Aptian in concert with the Oceanic Anoxic Event (OAE) 1a. The re-assignment of the final demise of the Urgonian-type peri-Vocontian rudistid platforms to the latest Barremian by means of ammonite biostratigraphy forces us to rethink the chronology of events and underlying causes. Re-examination of the best-documented platforms of the Mediterranean Tethys supports a large scale demise of the Urgonian rudist-dominated platforms in the latest Barremian, as demonstrated directly by ammonite occurrences and indirectly by correlations. In most cases, the last rudistid sequences, dominated by caprinid rudists of peri-Vocontian affinity, are topped by an exposure surface. Regional investigation reveals that the duration represented by the exposure surface depends on the regional geodynamics. While the hiatus straddles the middle part of the M. sarasini Zone (latest Barremian) in subsiding platforms, it is of greater duration in quiescent tectonic context spanning the upper M. sarasini Zone up to the D. forbesi–D. deshayesi zones interval (late early Aptian). This exposure event is estimated to have lasted at least 1 Myr and may have resulted from a high-amplitude relative sea-level fall. It is here suggested that a short-lasted, global cooling phase and associated glacio-eustatic sea-level fall may have interrupted rudistid-platform ecosystem in the latest Barremian and subsequently led to hiatus development. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/158582
Appears in Collections: 气候变化与战略
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作者单位: Groupement d'Intérêt Paléontologique, Science et Exposition, 60 Bd Georges Richard, Toulon, 83000, France; CNRS, IRD, Collège de France, CEREGE, Aix Marseille Université, Aix-en-Provence, France
Recommended Citation:
Frau C.,Tendil A.J.-B.,Pohl A.,et al. Revising the timing and causes of the Urgonian rudistid-platform demise in the Mediterranean Tethys[J]. Global and Planetary Change,2020-01-01,187