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  -