Structural controls on the location, geometry, and longevity of an intraplate volcanic system – The Tuatara Volcanic Field, Great South Basin, New Zealand

Supplementary Figure 1 – Interpreted seismic section linking the study area to the nearby Toroa-1 borehole, providing age constraints on the shallow sedimentary succession of the Tuatara Volcanic Field. Although located a great distance from the study area, the intervening geology between the borehole and the Tuatara Volcanic Field is relatively simple, dominated by post-rift strata allowing us to correlate horizons across the study area. See Figure 2 for location.