I bolded and underlined the segment using the word "IS"

Historical exploration work on the Cruz vein system, which included 91 trenches and 18 drill holes totalling 1,860 metres, proved that the quartz veins consistently contain gold and silver and that the Cruz vein system is a classic epithermal gold-silver deposit. Historical results of gold assays from the Cruz vein drill program include 6.0 metres of 2.31 grams per tonne, 6.0 metres of 2.96 grams per tonne (including 1.75 metres of 7.45 grams per tonne), 1.5 metres of 22.68 grams per tonne, 9.5 metres of 8.09 grams per tonne (including 1.5 metres of 35.84 grams per tonne), 10.8 metres of 2.4 grams per tonne and 1.2 metres of 6.95 grams per tonne. The vein intersections contain virtually no sulphides. The vein system is open along strike to the southeast and northwest, and to depth. (Summary report, Sivertz, 1999.)

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