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首页> 外文期刊>Oceanographic Literature Review >Paleoecology and predominance facies of late devonian foraminifera in successions of the catskill delta complex, Western New York, U.S.A.
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Paleoecology and predominance facies of late devonian foraminifera in successions of the catskill delta complex, Western New York, U.S.A.

机译：纽约西部Catskill Delta Complex的古生病学和晚德文郡Foraminifera的古生态学和优势相。

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Beyond yielding signals of extinction or stressed ecological conditions, modern and ancient foraminiferal assemblages reflect specific marine depositional environments and depths. Foraminiferal predominance facies and benthic foraminiferal depth zonation has been successfully used to identify specific marine environments dating back to the Carboniferous. Using insights from modern equivalents, correlative assemblages allow for pa-leoecological analysis and insights. Middle to Late Devonian (Frasnian) black and gray shale beds of western New York contain hundreds of diminutive calcareous and agglutinated foraminifera. The genera within these beds are reminiscent of shallow modern predominance facies. These foraminiferal assemblages and their associated predominance facies correlate well with prior lithologic and geochemical investigations that establish this portion of the Appalachian Basin as a deltaic setting but suggest it is likely inner neritic zone. Dominant genera include several species of Ammobaculites and Saccammina which suggest that paleodepths did not exceed 50 m throughout the Frasnian. Opportunistic genera reflect a muted crisis associated with the punctata isotopic event (Rhinestreet Event) and Lower Kellwasser (Pipe Creek) events. While there are definite shifts in the diversity of assemblages between gray and black shale, the foraminiferal type and feeding mode, indicative of depth and oxygen availability respectively, there is little variation between the distinct shale units. No significance was found between total organic carbon and foraminiferal type of feeding mode. Identification at the species level is problematic but assemblages at the genus-level suggest that the depositional environment was stressed. However, the effects of these marine crisis events were not significant for these foraminifera in comparison to those frequently reported; we found no local extinction for foraminifera at least through the lower Hanover Shale, just prior to the Hangenberg marine crisis event, within this deltaic complex of the Appalachian Basin in western New York.
机译：除了产生消灭或强调生态条件的发出信号，现代和古老的传染率集体反映了特定的海洋沉积环境和深度。已经成功地用于识别与石炭系的特定海洋环境识别特定的海洋环境。使用现代等同物的见解，相关性组合允许PA-Leoecologicatorication和Insights。中部到后期德文（弗拉斯尼亚）纽约西部的黑色和灰色页岩床含有数百个小钙质和凝集的foraminifera。这些床内的Genera让人想起浅的现代优势相。这些传染率和其相关的主要相面与现有岩性和地球化学研究相相关，即将Appalachian盆地的这一部分作为红细变设定，但表明它很可能是内部内腔区域。占优势的属包括几种氨基丙酰胺和骶癌肿瘤，表明古部门在整个弗拉斯尼亚不超过50米。机会主义的属性反映了与Punctata同位素事件（Rhinestreet事件）和下凯尔浪车（管溪）活动相关的柔和危机。虽然灰色和黑色页岩之间的组装多样化，但是分别的多孔型和馈电模式分别，指示深度和氧可用性，不同的页岩单元之间几乎没有变化。在总有机碳和火山虫型喂养模式之间没有发现任何意义。物种水平的鉴定是有问题的，但在群体的组装表明沉积环境受到压力。然而，与经常报道的人相比，这些海洋危机事件的影响对于这些传染媒体的影响并不重要;在纽约阿巴拉契亚盆地的联赛复合体内，在Hangenberg Marine Crisis活动中，我们发现至少通过下汉诺威页岩的汉诺威页岩中没有当地灭绝。

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  • 来源
    《Oceanographic Literature Review》 |2021年第7期|1492-1492|共1页
  • 作者

    I. Li; K. Bartlett; C. Kowalski;

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    University at Buffalo Department of Geology 126 Cooke Hall Buffalo NY 14260 United States;

    University at Buffalo Department of Geology 126 Cooke Hall Buffalo NY 14260 United States;

    University at Buffalo Department of Geology 126 Cooke Hall Buffalo NY 14260 United States;

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