eprintid: 10167569 rev_number: 9 eprint_status: archive userid: 699 dir: disk0/10/16/75/69 datestamp: 2023-03-31 15:07:54 lastmod: 2023-03-31 15:07:54 status_changed: 2023-03-31 15:07:54 type: article metadata_visibility: show sword_depositor: 699 creators_name: McCarthy, Francine MG creators_name: Patterson, Timothy creators_name: Head, Martin J creators_name: Riddick, Nicholas L creators_name: Cumming, Brian F creators_name: Hamilton, Paul B creators_name: Pisaric, Michael FJ creators_name: Gushulak, Cale creators_name: Leavitt, Peter R creators_name: Lafond, Krysten M creators_name: Llew-Williams, Brendan creators_name: Marshall, Matthew creators_name: Heyde, Autumn creators_name: Pilkington, Paul M creators_name: Moraal, Joshua creators_name: Boyce, Joseph creators_name: Nasser, Nawaf A creators_name: Walsh, Carling creators_name: Garvie, Monica creators_name: Roberts, Sarah creators_name: Rose, Neil L creators_name: Cundy, Andy B creators_name: Gaca, Pawel creators_name: Milton, Andy creators_name: Hajdas, Irka creators_name: Crann, Carley A creators_name: Boom, Arnoud creators_name: Finkelstein, Sarah A creators_name: McAndrews, John H title: The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series ispublished: inpress divisions: UCL divisions: B03 divisions: C03 divisions: F26 keywords: acid precipitation, combustion, Dutch Elm disease, Environmental Sciences, Environmental Sciences & Ecology, Environmental Studies, EUTROPHICATION, FLY-ASH PARTICLES, fossil plankton, Geology, Geosciences, Multidisciplinary, Great Acceleration, Life Sciences & Biomedicine, MEROMICTIC LAKE, mu XRF, Physical Sciences, radionuclides, RECORD, Science & Technology, SCPs, SEDIMENTS, SOUTHERN ONTARIO, stable isotopes, varves, WORKING note: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. abstract: 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. date: 2023-02-16 date_type: published publisher: SAGE official_url: https://doi.org/10.1177/20530196221149281 oa_status: green full_text_type: other language: eng primo: open primo_central: open_green verified: verified_manual elements_id: 2007362 doi: 10.1177/20530196221149281 lyricists_name: Rose, Neil lyricists_id: NLROS84 actors_name: Rose, Neil actors_id: NLROS84 actors_role: owner funding_acknowledgements: [NSERC Discovery]; [Brock University]; [Carleton University]; [Canadian Museum of Nature]; [Conservation Halton]; [Royal Ontario Museum] full_text_status: public publication: Anthropocene Review pages: 32 citation: McCarthy, Francine MG; Patterson, Timothy; Head, Martin J; Riddick, Nicholas L; Cumming, Brian F; Hamilton, Paul B; Pisaric, Michael FJ; ... McAndrews, John H; + view all <#> McCarthy, Francine MG; Patterson, Timothy; Head, Martin J; Riddick, Nicholas L; Cumming, Brian F; Hamilton, Paul B; Pisaric, Michael FJ; Gushulak, Cale; Leavitt, Peter R; Lafond, Krysten M; Llew-Williams, Brendan; Marshall, Matthew; Heyde, Autumn; Pilkington, Paul M; Moraal, Joshua; Boyce, Joseph; Nasser, Nawaf A; Walsh, Carling; Garvie, Monica; Roberts, Sarah; Rose, Neil L; Cundy, Andy B; Gaca, Pawel; Milton, Andy; Hajdas, Irka; Crann, Carley A; Boom, Arnoud; Finkelstein, Sarah A; McAndrews, John H; - view fewer <#> (2023) The varved succession of Crawford Lake, Milton, Ontario, Canada as a candidate Global boundary Stratotype Section and Point for the Anthropocene series. Anthropocene Review 10.1177/20530196221149281 <https://doi.org/10.1177/20530196221149281>. (In press). Green open access document_url: https://discovery.ucl.ac.uk/id/eprint/10167569/1/Crawford%20Lake%20ANR%20manuscript%20-%20no%20formatting.pdf