@article{62911c6954ed4920ac248c151bac859c,
title = "Impact ejecta at the Paleocene-Eocene boundary",
abstract = "Extraterrestrial impacts have left a substantial imprint on the climate and evolutionary history of Earth. A rapid carbon cycle perturbation and global warming event about 56 million years ago at the Paleocene-Eocene (P-E) boundary (the Paleocene-Eocene Thermal Maximum) was accompanied by rapid expansions of mammals and terrestrial plants and extinctions of deep-sea benthic organisms. Here, we report the discovery of silicate glass spherules in a discrete stratigraphic layer from three marine P-E boundary sections on the Atlantic margin. Distinct characteristics identify the spherules as microtektites and microkrystites, indicating that an extraterrestrial impact occurred during the carbon isotope excursion at the P-E boundary.",
author = "Schaller, {Morgan F.} and Fung, {Megan K.} and Wright, {James D.} and Katz, {Miriam E.} and Kent, {Dennis V.}",
note = "Funding Information: We thank L. Lanci, B. Glass, and E. B. Watson for many helpful discussions. Samples were provided by IODP, which is sponsored by NSF and participating countries under management of the Joint Oceanographic Institutions, Inc. We also thank J. Singer for his help and expertise on the ion microprobe at RPI and C. Hoff for his valuable expertise in FTIR and Raman spectroscopy. We thank the four anonymous reviewers for their constructive input, which greatly strengthened this manuscript. This work was funded in part by the Comer Science and Education Foundation. LDEO contribution 8060. Publisher Copyright: {\textcopyright} 2016, American Association for the Advancement of Science. All rights reserved.",
year = "2016",
month = oct,
day = "14",
doi = "10.1126/science.aaf5466",
language = "English (US)",
volume = "354",
pages = "225--229",
journal = "Science",
issn = "0036-8075",
publisher = "American Association for the Advancement of Science",
number = "6309",
}