The Sihailongwan Maar Lake, northeastern China as a candidate Global boundary Stratotype Section and Point for the Anthropocene series

Sihailongwan Maar Lake, located in Northeast China, is a candidate Global boundary Stratotype Section and Point (GSSP) for demarcation of the Anthropocene. The lake’s varved sediments are formed by alternating allogenic atmospheric inputs authigenic lake processes store record environmental human impacts at continental-global scale. Varve counting radiometric dating provided precise annual-resolution sediment chronology site. Time series records radioactive ( 239,240 Pu, 129 I soot 14 C), chemical (spheroidal carbonaceous particles, polycyclic aromatic hydrocarbons, soot, heavy metals, δ 13 C, etc.), physical (magnetic susceptibility grayscale) biological (environmental DNA) indicators all show rapid changes mid-20th century, coincident with clear lithological sediments. Statistical analyses these proxies tipping point 1954 CE. Pu activities follow typical unimodal globally-distributed profile, proposed as primary marker A increase 88 mm depth core SHLW21-Fr-13 (1953 CE) synchronous other anthropogenic Great Acceleration, marking onset results indicate that Lake an ideal site Anthropocene GSSP.