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首页> 外文期刊>Stratigraphy >Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstatte, Pennsylvanian of New Mexico, USA
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Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstatte, Pennsylvanian of New Mexico, USA

机译：美国新墨西哥州宾夕法尼亚州金尼砖采石场Lagerstatte的精确年龄和生物地层意义

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The Kinney Brick Quarry is a world famous Late Pennsylvanian fossil Lagerstatte in central New Mexico, USA. The age assigned to the Kinney Brick Quarry (early-middle Virgilian) has long been based more on its inferred lithostratigraphic position than on biostratigraphic indicators at the quarry. We have developed three datasets-stratigraphic position, fusulinids and conodonts-that indicate the Kinney Brick Quarry is older, of middle Missourian (Kasimovian) age. Our detailed local lithostratigraphic studies coupled with regional stratigraphic investigations indicate the Kinney Brick Quarry is in the Tinajas Member of the Atrasado Formation, so it is stratigraphically lower than suggested by previously published maps. A laterally extensive fusulinid-bearing limestone a few meters below the level of the Kinney Brick Quarry yields an early-middle Missourian fusulinid assemblage consisting of Tumulotriticites cf. T tumidus and species of Triticites: T. cf. T. planus, T. cf. T. myersi and T. ex gr. T. ohioensis. The Kinney conodont fauna is characterized by Idiognathodus corrugatus and I. cherryvalensis, which suggest an assignment to the Idiognathodus confragus Zone of the North America Midcontinent region (Dennis cyclothem; middle Missourian). Nonmarine biostratigraphic indicators at the Kinney Brick Quarry indicate either an imprecise age (Late Pennsylvanian: megaflora) or a slightly younger age (late Kasimovian-early Gzhelian: blattids) than do stratigraphic position and marine microfossils. The well-established age of Kinney on the marine timescale thus can be used to better calibrate the nonmarine biostratigraphy. So, the insect biozonation of the Euramerican continental basins, which was calibrated to the so-called regional West European Carboniferous stages by macrofloras and to the global marine scale by sparse, ambiguous isotopic ages, can now be linked directly to the marine conodont zonation.
机译：Kinney Brick Quarry是美国新墨西哥州中部举世闻名的宾夕法尼亚州晚期化石Lagerstatte。长期以来，分配给Kinney Brick Quarry（维吉尔中早）的年龄更多地取决于其推断的岩体地层位置，而不是采石场的生物地层指标。我们已经开发了三个数据集-地层位置，岩藻胶体和牙形石-指示Kinney Brick Quarry年龄较大，处于密苏里州（Kasimovian）中年。我们详细的当地岩相地层学研究以及区域地层研究表明，金尼砖矿场位于Atrasado组的Tinajas成员中，因此其地层学特征低于先前发布的地图所建议的水平。在Kinney砖采石场以下几米处，横向扩展的含岩藻土的石灰岩产生了由Tumulotriticites组成的密苏里州岩溶岩的早中期组合（参见图3）。 T mid虫和Triticite物种：T. cf. T.planus，T.cf. T. myersi和T. ex gr。俄亥俄州T.金尼牙形动物群的特征是象牙白嘴鸦和樱桃谷I，这表明它们属于北美中部地区（丹尼斯环线;密苏里州中部）的象牙fra斑带。 Kinney Brick Quarry的非海洋生物地层指标表明年龄不精确（比宾夕法尼亚州晚：巨型植物区系），或者年龄比地层位置和海洋微化石年龄稍小（卡西莫维安晚期至Gzhelian晚期：陡壁）。因此，可以在海洋时间尺度上确定的Kinney年龄来更好地校准非海洋生物地层学。因此，欧亚大陆盆地的昆虫生物区划已通过大植物群校准为所谓的西欧地区石炭纪阶段，并通过稀疏的，模棱两可的同位素年龄校准为全球海洋规模，现在可以直接与海洋牙形石地带划分联系起来。

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