Amulti-proxy study of changing environmental conditions in aYounger Dryas sequence in southwesternManitoba, Canada-Comment on the paper by Teller et al., Quaternary Research Volume 93, 60-87

摘要

Teller et al. (2019) present radiocarbon analyses and paleoenvironmental data for a stratigraphic section at Lake Hind, Manitoba, Canada. The article expands on previous ones (Firestone et al., 2007; Kennett et al., 2015) arguing that extraterrestrial impact proxies are present at Lake Hind, comprising a Younger Dryas Boundary layer (YDB), and that this layer is synchronous with similar layers at other sites. However, we note three significant problems that cast doubt on their conclusions.