TY - INPR UR - https://doi.org/10.1177/20530196221149281 ID - discovery10167569 EP - 32 N2 - An annually laminated succession in Crawford Lake, Ontario, Canada is proposed as the Global boundary Stratotype Section and Point (GSSP) for the Anthropocene as a series/epoch with a base dated at 1950 CE. Varve couplets of organic matter capped by calcite precipitated each summer in alkaline surface waters reflect environmental change at global to local scales. Spheroidal carbonaceous particles and nitrogen isotopes record an increase in fossil fuel combustion in the early 1950s, coinciding with fallout from nuclear and thermonuclear testing?239+240Pu and 14C:12C, the latter more than compensating for the effects of old carbon in this dolomitic basin. Rapid industrial expansion in the North American Great Lakes region led to enhanced leaching of terrigenous elements by acid precipitation during the Great Acceleration, and calcite precipitation was reduced, producing thin calcite laminae around the GSSP that is marked by a sharp decline in elm pollen (Dutch Elm disease). The lack of bioturbation in well-oxygenated bottom waters, supported by the absence of fossil pigments from obligately anaerobic purple sulfur bacteria, is attributed to elevated salinities and high alkalinity below the chemocline. This aerobic depositional environment, unusual in a meromictic lake, inhibits the mobilization of 239Pu, the proposed primary stratigraphic guide for the Anthropocene. AV - public TI - The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series Y1 - 2023/02/16/ KW - acid precipitation KW - combustion KW - Dutch Elm disease KW - Environmental Sciences KW - Environmental Sciences & Ecology KW - Environmental Studies KW - EUTROPHICATION KW - FLY-ASH PARTICLES KW - fossil plankton KW - Geology KW - Geosciences KW - Multidisciplinary KW - Great Acceleration KW - Life Sciences & Biomedicine KW - MEROMICTIC LAKE KW - mu XRF KW - Physical Sciences KW - radionuclides KW - RECORD KW - Science & Technology KW - SCPs KW - SEDIMENTS KW - SOUTHERN ONTARIO KW - stable isotopes KW - varves KW - WORKING PB - SAGE A1 - McCarthy, Francine MG A1 - Patterson, Timothy A1 - Head, Martin J A1 - Riddick, Nicholas L A1 - Cumming, Brian F A1 - Hamilton, Paul B A1 - Pisaric, Michael FJ A1 - Gushulak, Cale A1 - Leavitt, Peter R A1 - Lafond, Krysten M A1 - Llew-Williams, Brendan A1 - Marshall, Matthew A1 - Heyde, Autumn A1 - Pilkington, Paul M A1 - Moraal, Joshua A1 - Boyce, Joseph A1 - Nasser, Nawaf A A1 - Walsh, Carling A1 - Garvie, Monica A1 - Roberts, Sarah A1 - Rose, Neil L A1 - Cundy, Andy B A1 - Gaca, Pawel A1 - Milton, Andy A1 - Hajdas, Irka A1 - Crann, Carley A A1 - Boom, Arnoud A1 - Finkelstein, Sarah A A1 - McAndrews, John H JF - Anthropocene Review N1 - This version is the author accepted manuscript. For information on re-use, please refer to the publisher?s terms and conditions. ER -