The Anthering outcrop (Austria), a key-section for correlation between Tethys and northwestern Europe near the Paleocene/Eocene boundary
The Anthering outcrop (Austria), a key-section for correlation between Tethys and northwestern Europe near the Paleocene/Eocene boundary
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Anthering 露头（奥地利），是古新世/始新世边界附近特提斯洋与西北欧之间关联的关键部分
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
H. Egger
中科院分区：
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作者：
C. Heilmann;H. Egger
奥地利萨尔茨堡附近安瑟林的Rhenodanubian复理石中的一个剖面记录了重要的甲藻事件，这些事件在欧洲西北部也得到了承认，在缺乏钙质微体化石的古新世/始新世边界区间，它们已被证明是可靠的生物地层学工具。这是该时期欧洲西北部与特提斯洋之间首次直接的生物地层对比。奥地利的甲藻记录表明，古新世/始新世边界附近的一些甲藻事件可能是广泛认可的。安瑟林剖面中的钙质超微化石使甲藻事件和标准钙质超微化石分带之间的直接校准成为可能（Egger等，出版中）。从上到下，最重要的甲藻事件是：1）一个强大的顶甲藻的顶点。（超过60%的总甲藻组合在某些样品中）在上NP 9，对比的百分比一般在10和25之间的节以上和以下。这一峰值与δC的负移相一致，这可能代表了全球碳同位素偏移（CIE）（Egger等人，出版中）。2)Apectodinium augustum的定期发生大约局限于与该属的顶点相同的间隔。3)在NP 10的上部首次出现了Wetzeliella属。该属由两个种代表：一个与西北欧洲种W相同或接近。lobisca或W.月状。另一个是W。单尾骨更常见它以前曾在北大西洋巴斯克盆地（Caro 1973）有记录，但在欧洲西北部没有。在A. augustum和FAD。北海盆地的主要灰相发生在相对于相同的甲藻事件的相似位置。西北欧甲藻事件和标准超微化石分带之间的一阶校准提供了独立的证据，从全球地层方案的Sparnacian和Ypresian阶段的类型区的部分的位置。在安瑟林（Egger et al. in press）和伦敦粘土的基底层（Berggren & Aubry 1998），钙质超微化石指状三臂藻（Tribrachiatus digitalis）的出现与甲藻事件相似。新的数据似乎证实了这些部分的生物年代地层位置，迄今为止，大多数工作者主要根据磁性地层学，火山灰对比和绝对定年的组合来解释。
A section in the Rhenodanubian Flysch at Anthering, near Salzburg, Austria, records important dinoflagellate events which are also recognized in NW Europe, where they have proved to be reliable biostratigraphical tools in the Paleocene/Eocene boundary interval lacking calcareous microfossils. It is the first direct biostratigraphical correlation between NW Europe and the Tethys in this interval. The Austrian dinoflagellate record suggests that some dinoflagellate events near the Paleocene/Eocene boundary are probably widely recognizable. The calcareous nannofossils in the Anthering section enable a direct calibration between the dinoflagellate events and the standard calcareous nannofossil zonation (Egger et al. in press). In ascending order, the most important dinoflagellate events are: 1) A strong acme of Apectodinium spp. (exceeding 60% of the total dinoflagellate assemblage in some samples) in upper NP9, contrasting to percentages generally between 10 and 25 in the sections above and below. The acme coincides with a negative shift in δC interpreted to probably represent the global carbon isotopic excursion (CIE) (Egger et al. in press). 2) The regular occurrence of Apectodinium augustum approximately restricted to the same interval as the acme of the genus. 3) The first appearance of the genus Wetzeliella in the upper part of NP10. The genus is represented by two species: one is identical or close to the NW European species W. lobisca or W. lunaris. The other one is W. unicaudalis, which is more common. It has formerly been recorded in the North Atlantic Basque Basin (Caro 1973), but not in NW Europe. An interval with bentonite layers occurs between the LAD of A. augustum and FAD of Wetzeliella. The main ash phase of the North Sea Basin occurs in a similar position relative to the same dinoflagellate events. This first-order calibration between NW European dinoflagellate events and the standard nannofossil zonation provides independent evidence for the position of sections from the type areas of the Sparnacian and Ypresian stages in the global stratigraphical schemes. The occurrence of the calcareous nannofossil Tribrachiatus digitalis relative to the dinoflagellate events is similar at Anthering (Egger et al. in press) and in the basement bed of the London Clay (Berggren & Aubry 1998). The new data seem to confirm the bio-chronostratigraphical position of these sections as hitherto interpreted by most workers mainly on the basis of a combination of magnetostratigraphy, tephra-correlation, and absolute datings.