Figure 12. Downhole logs and chemically defined units in two holes on section 600 NW at the Fetais deposit. Hole FS-600A is through the thickest part of the orebody, while hole FS-22 is through the downdip thin edge of the orebody. Note that the felsic rocks in the footwall are all rhyolite A. The main orebody is overlain by rhyolite C, then cherts (with hematite and magnetite facies). On the margin of the orebody, rhyolite B occurs in place of rhyolite C.