爱尔兰西部志留纪(landovery) Eoplectodonta壳层:机会主义、风暴和沉积速率在其形成中的作用

Q4 Earth and Planetary Sciences

Irish Journal of Earth Sciences Pub Date : 2022-01-01 DOI:10.3318/IJES.2003.21.1.105

D. Harper, Eamon Doyle

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引用次数: 3

摘要

摘要：在许多深水环境中的Llandovery上层组合中，双主题腕足动物Eoplectodonta很常见，但这种小型的plectambonitoid并不是一个著名的机会主义者。在爱尔兰西部康尼马拉北部的Telychian Kilbride组中，至少有一个层面包含了不同寻常的贝壳组合，绝大多数由Eoplectodonta penkillensis（Reed）主导。基于深陆架间歇性风暴活动后周期性产生的空置软基底的可用性，为该组合开发了一个机会主义模型。此外，海侵过程中沉积物的快速堆积可能是造成这种高应力环境的一个重要因素。

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A Silurian (Llandovery) Eoplectodonta Shell Bed in Western Ireland: The Role of Opportunism, Storms and Sedimentation Rates in Its Formation

Abstract:The ambitopic brachiopod Eoplectodonta is common in many upper Llandovery assemblages from deep-water settings, but this small plectambonitoid is not a noted opportunist. At least one level within the Telychian Kilbride Formation of north Connemara, western Ireland, contains unusual shelly associations overwhelmingly dominated by Eoplectodonta penkillensis (Reed). An opportunist model is developed for this assemblage based on the availability of vacant soft substrates periodically created after intermittent storm activity on the deep shelf. In addition, rapid sediment accumulation during transgression may have been an important contributing factor in this high-stress environment.

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来源期刊

Irish Journal of Earth Sciences Earth and Planetary Sciences-Earth and Planetary Sciences (all)

CiteScore

0.90

自引率

0.00%

发文量