Publications by authors named "John H McAndrews"
Anthropocene Rev
April 2023
Article Synopsis
- - The Crawford Lake site in Ontario is proposed as a Global boundary Stratotype Section and Point (GSSP) to mark the beginning of the Anthropocene epoch at 1950 CE, based on annual layers of sediment that reflect both global and local environmental changes.
- - Evidence of increased fossil fuel combustion and nuclear testing in the early 1950s is captured through changes in sediment composition, including spheroidal carbonaceous particles and nitrogen isotopes, alongside a notable drop in elm pollen linked to Dutch Elm disease.
- - The unique aerobic conditions at the lake's bottom, due to high salinity and alkalinity, limit bioturbation and the mobilization of plutonium (Pu), which is suggested as a key
