首页> 外文期刊>Estonian Journal of Earth Sciences >New biostratigraphic and chemostratigraphic data from the Chicotte Formation (Llandovery, Anticosti Island, Laurentia) compared with the Viki core (Estonia, Baltica)
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New biostratigraphic and chemostratigraphic data from the Chicotte Formation (Llandovery, Anticosti Island, Laurentia) compared with the Viki core (Estonia, Baltica)

机译:与Viki岩心(爱沙尼亚,波罗的海)相比,Chicotte组(Llandovery,Anticosti岛,Laurentia)的新生物地层和化学地层学数据

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>Due to the lack of biostratigraphically useful graptolites in the crinoidal and reefal Chicotte Formation on Anticosti Island (Qu??bec, Canada), the precise chronostratigraphic position of the formation is not known. New stable carbon isotope and conodont data and a comparison with the detailed conodont distribution and d13>C development in the Viki core (Estonia) suggest an early Telychian age (Pterospathodus eopennatus to P. a. angulatus zones) for at least the lower half of the formation. This interval is characterized by a small but distinct positive excursion in d13>C, with peak values of + 3.2a€° and + >2.8a€° VPDB in the lowermost 10-15 m of the Chicotte Formation on Anticosti and in the Viki core, respectively.
机译:>由于安蒂科斯蒂岛(加拿大魁北克省)的海陆奇科特礁和礁礁奇科特岩层中缺少生物地层学有用的鹅卵石,该地层的精确年代地层位置尚不清楚。 Viki核心区(爱沙尼亚)的新的稳定的碳同位素和牙形体数据以及与详细的牙形体分布和 d 13 > C发育的比较表明,早期的特利琴时代(至少在地层下半部分的翼龙(Pterospathodus eopennatus)到 P.a.angulatus 区)。此间隔的特征是 d 13 > C的小但明显的正偏移,峰值为+ 3.2a€°和+ > 2.8a VPDB分别位于Anticosti和Viki核心地带的Chicotte组的最下层10-15 m。

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