Petrified trunks of trees occur in Eocene Kamloops Group sandstone interbedded with volcanic flows behind 'Perry Ranch' about 7.5 kilometres east of Cache Creek. The sedimentary beds weather to a light sandy colour, readily spotted in the darker flows. Agate is abundant in the area and much may be picked up on the slopes leading up to the sedimentary beds (Geological Survey of Canada Paper 72-53). Quartz crystals also occur in a white seam (Western Homes & Living).