Relationship between mass extinction and iridium across the Cretaceous-Paleogene boundary in New Jersey
Relationship between mass extinction and iridium across the Cretaceous-Paleogene boundary in New Jersey
复制标题
新泽西州白垩纪-古近纪边界大灭绝与铱的关系
作者：
K. Miller;R. Sherrell;J. Browning;M. P. Field;W. B. Gallagher;R. Olsson;P. Sugarman;S. Tuorto;H. Wahyudi
我们将新泽西州的铱 (Ir) 异常与标志着白垩纪-古近纪 (K-Pg) 边界的海洋浮游生物的大规模灭绝直接联系起来。我们利用来自新泽西州弗里霍尔德（美国）Tighe Park 泥沙剖面的新结果证实了之前关于白垩纪大型动物灭绝（“Pinna”床）下方 20 厘米处存在 Ir 异常的报告，但我们还表明，Ir 异常与新泽西州其他三个富含粘土的剖面的海洋大规模灭绝有关。因此，我们将弗里霍尔德的异常现象归因于 Ir 的向下运动，并重申了撞击与大规模灭绝之间的联系。
We directly link iridium (Ir) anomalies in New Jersey to the mass extinction of marine plankton marking the Cretaceous-Paleogene (K-Pg) boundary. We confirm previous reports of an Ir anomaly 20 cm below the extinction of Cretaceous macrofauna (the “ Pinna ” bed) with new results from a muddy sand section from Tighe Park, Freehold, New Jersey (United States), but we also show that Ir anomalies correlate with marine mass extinctions at three other clay-rich New Jersey sections. Thus, we attribute the anomaly at Freehold to the downward movement of Ir and reaffirm the link between impact and mass extinction.