Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstätte, Pennsylvanian of New Mexico, USA
Precise age and biostratigraphic significance of the Kinney Brick Quarry Lagerstätte, Pennsylvanian of New Mexico, USA
复制标题
美国新墨西哥州宾夕法尼亚州金尼砖采石场 Lagerstätte 的精确年龄和生物地层意义
DOI：
10.29041/strat.08.1.02
复制
发表时间：
2011
期刊：
影响因子：
1.5
通讯作者：
A. Bashforth
中科院分区：
文献类型：
--
作者：
S. Lucas;B. Allen;K. Krainer;J. Barrick;D. Vachard;Joerg W. Schneider;W. DiMichele;A. Bashforth
金尼采石场是美国新墨西哥州中部世界著名的晚宾夕法尼亚化石Lagerstätte。长期以来，金尼砖采石场（早中奥陶世）的年龄更多地基于其推断的岩石地层位置，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，fusulinids和牙形刺-这表明金尼砖采石场是旧的，中Missourian（Kasimovian）的年龄。我们详细的当地岩石地层学研究以及区域地层调查表明，Kinney砖采石场位于Atrasado组的Tinajas段，因此其地层低于先前绘制的地图。一个横向广泛的fusulinid-bearing石灰岩几米以下的水平的Kinney砖采石场产生一个早中期Missourian fusulinid组合组成的Tumulotriticites cf。T. tumidus和Triticites种：T.参见T. planus、T.参见T. myersi和T.来自G. T. Ohioensis。金尼牙形石动物群以Idiognathoduscorrugatus和I. cherryvalensis，这表明分配到北美大陆中部地区的Idiognathodus confragus带（丹尼斯cyclothem;中密苏里）。在Kinney砖采石场的非海相生物地层指标表明，要么是一个不精确的年龄（晚宾夕法尼亚州：megaflora）或稍年轻的年龄（晚Kasimovian早期Gzhelian：battids）比地层位置和海洋微体化石。因此，在海洋时间尺度上的金尼年龄可以用来更好地校准非海洋生物地层。因此，昆虫生物带的欧美大陆盆地，这是校准到所谓的区域西欧石炭纪阶段的大型植物群和全球海洋规模的稀疏，模糊的同位素年龄，现在可以直接联系到海洋牙形石分带。
The Kinney Brick Quarry is a world famous Late Pennsylvanian fossil Lagerstätte 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 publishedmaps. 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 globalmarine scale by sparse, ambiguous isotopic ages, can now be linked directly to the marine conodont zonation.