Supplemental Material: Simultaneous Middle Pleistocene eruption of three widespread tholeiitic basalts in northern California (USA): Insights into crustal magma transport in an actively extending back arc

Table S1 (paleomagnetic analysis methods and data); Table S2 (detailed X-ray fluorescence spectrometry and instrumental neutron activation analysis methods and data); Table S3 and Figures S1–S4 (⁴⁰Ar/³⁹Ar experimental results, age spectra, and radiometric dating methods); and Figure S5 (location map of basalts plotted in Figure 2B).