Carnian-Norian biomagnetostratigraphy at Silicka Brezova (Slovakia): correlation to other Tethyan sections and to the Newark Basin
Carnian-Norian biomagnetostratigraphy at Silicka Brezova (Slovakia): correlation to other Tethyan sections and to the Newark Basin
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DOI：
10.1016/s0031-0182(02)006545
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发表时间：
2003-02-15
影响因子：
3
通讯作者：
Sykora, M
中科院分区：
文献类型：
--
作者：
Channell, JET;Kozur, HW;Sykora, M
特提斯剖面上三叠世磁性地层的相关性受到牙形刺生物地层学和分类学困难以及不连续沉积的阻碍，特别是在土耳其和奥地利的“哈尔施塔特石灰岩”中。 Silicka Brezova（斯洛伐克）暴露的上卡尼阶到上诺里阶石灰岩的磁性地层学和牙形刺生物地层学可以与其他特提斯剖面和纽瓦克盆地的大陆序列相关联。由此产生的相关性有助于解决现有牙形刺分区中的一些明显差异，并导致与北美陆地脊椎动物和孢粉学区的相关性得到修正。这些相关性表明诺里安-雷蒂亚边界位于纽瓦克极性区 E17r 内，时间约为 207 Ma。卡尼期-诺里安边界位于纽瓦克极性区E7r底部附近，时间约为226 Ma。这意味着诺里安阶段和雷蒂亚阶段的持续时间分别为 19 密尔和 7 密尔。 (C) 2002 Elsevier Science B.V. 保留所有权利。
Correlations of Upper Triassic magnetic stratigraphies from Tethyan sections have been hampered by difficulties with conodont biostratigraphy and taxonomy, and discontinuous sedimentation, particularly in the 'Hallstatt Limestones' of Turkey and Austria. The magnetic stratigraphy and conodont biostratigraphy from the Upper Carnian to Upper Norian limestones exposed at Silicka Brezova (Slovakia) can be correlated to other Tethyan sections and to the continental succession in the Newark Basin. The resulting correlations help to resolve some of the apparent discrepancies in existing conodont zonations, and result in a revised correlation to North American terrestrial vertebrate and palynological zones. The correlations imply that the Norian-Rhaetian boundary lies within Newark polarity zone E17r at similar to207 Ma. The Carnian-Norian boundary lies close to the base of Newark polarity zone E7r at similar to226 Ma. This implies durations for the Norian and Rhaetian stages of 19 Myr and 7 Myr, respectively. (C) 2002 Elsevier Science B.V. All rights reserved.