American Journal of Science: 321 (3)

March 01, 2021; Volume 321,Issue 3

Article

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Carbon cycle evolution before and after the Great Oxidation of the atmosphere
Don E. Canfield

American Journal of Science March 2021, 321 (3) 297-331; DOI: https://doi.org/10.2475/03.2021.01
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Unmixing multiple metamorphic muscovite age populations with powder X-ray diffraction and ⁴⁰Ar/³⁹Ar analysis
Ryan J. Mcaleer, David L. Bish, Michael J. Kunk, Peter M. Valley, Gregory J. Walsh and Robert P. Wintsch

American Journal of Science March 2021, 321 (3) 332-364; DOI: https://doi.org/10.2475/03.2021.02
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⁴⁰Ar/³⁹Ar and LA-ICP-MS U–Pb geochronology for the New England portion of the Early Cretaceous New England-Quebec igneous province: Implications for the postrift evolution of the eastern North American Margin
Jennifer R. Cooper Boemmels, Jean M. Crespi, Laura E. Webb and Julie C. Fosdick

American Journal of Science March 2021, 321 (3) 365-391; DOI: https://doi.org/10.2475/03.2021.03