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