• journal_title：Geology
• Contributor：Kenneth G. Miller ; Robert M. Sherrell ; James V. Browning ; M. Paul Field ; W. Gallagher ; Richard K. Olsson ; Peter J. Sugarman ; Steven Tuorto ; Hendra Wahyudi
• Publisher：Geological Society of America
• Date：2010-
• Format：text/html
• Language：en
• Identifier：10.1130/G31135.1
• journal_abbrev：Geology
• issn：0091-7613
• volume：38
• issue：10
• firstpage：867
• section：Articles

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.