I therefore estimate the total amount of exotic olivine basalt imported to the Taraco Peninsula in the Middle Formative to be at an absolute minimum 8.2 metric tons (on-site surface + minimum of on-site subsurface), probably more like 21.5 metric tons (on-site surface + maximum on-site subsurface) and possibly as much as 38 metric tons (on-site surface + maximum on-site subsurface + off-site surface). Given that whole hoes of this material on the Taraco Peninsula weigh on average approximately 100 g, this would translate to 82000, 215000 or 380000 hoes, respectively.