Radiogenic 40Ca in Seawater: Implications for Modern and Ancient Ca Cycles Antonelli, Michael A. ; DePaolo, Donald J. ; Christensen, John N. ; Wotzlaw, Jörn-Frederik ; Pester, Nicholas J. ; Bachmann, Olivier Abstract Publication: ACS Earth and Space Chemistry Pub Date: September 2021 DOI: 10.1021/acsearthspacechem.1c00179 Bibcode: 2021ESC.....5.2481A