Supplementary Fig. 3. Foraminifera stable isotopes across the NKK-1 borehole EOT succession on the depth scale. The Eocene–Oligocene Transition in Nanggulan, Java: lithostratigraphy, biostratigraphy and foraminiferal stable isotopes

Supplementary Fig. 3. Foraminifera stable isotopes across the NKK-1 borehole EOT succession on the depth scale. The zone of faded isotopic data points highlights where extensive infilling with sparry calcite is associated with isotopically depleted ε¹⁸O and ε¹³C values even in separated test fragments (c. 53–47 mbs), masking the primary foraminiferal/ocean signal. The dashed vertical pale blue and pale grey lines (planktonic and benthic respectively) represent late Eocene ‘base-line’ ‘unaltered values’ used as a threshold for determining which data points contain significant diagenetic calcite bias and, thus, should be excluded from our interpretation (see Supplementary Fig. 3).