Supplement to: Pichevin, Laetitia; Ganeshram, Raja S; Reynolds, Ben C; Prahl, Frederick G; Pedersen, Thomas F; Thunell, Robert C; McClymont, Erin L (2012): Silicic acid biogeochemistry in the Gulf of California: Insights from sedimentary Si isotopes. Paleoceanography, 27(2), 319-333, https://doi.org/10.1029/2011PA002237