Erratum to: Environ Earth Sci (2013) 69:1249–1261 DOI 10.1007/s12665-012-2034-z

In the original article the unit of the δ 34S values of stable isotope analyses in the text at page 1255 was accidentally changed during the layout process and overseen in the correction. It must be ‰ (per mille) in all cases instead of % (percent).