Results of analyses from the tuffs in the Pliocene Mukaiyama Formation, Sendai area, Japan.

<p><strong>Table S1</strong>. Heavy mineral occurrences and abundances in the studied tuffs from the Mukaiyama Formation. ◎:abundant, 〇: common, △: rare, ×: absent. Red symbols for zircon indicate that most zircon grains are bright red in color.</p> <p><strong>Table S2.</strong> Results of LA–ICP–MS U–Pb analyses of zircon grains from the studied tuffs. Each analysis was performed on a different grain.</p> <p><strong>Table S3. </strong>Major and trace element compositions of apatite from the studied tuffs, analyzed using wavelength disper  sive spectrometry on an electron probe microanalyser (JEOL 8530F). Each analysis was performed on a different grain.</p>