Intrafolial folds in quartz sericite schist, Bathurst, New Brunswick, Canada


I collected this rock in 1969 in a region of very poor outcrop in the Caribou mine area.  Because the ‘bush’ in this region is so thick, and outcrops so scant, the mapping involved following picket lines surveyed along NS and EW grid lines.  In outcrop I could make out the possibility that the quartz sericite schists were internally intrafolially folded, which then was confirmed when I slabbed and polished the rock.

Age & Formation
rock from the Tetagouche Group of Ordovician age, ~420 Ma.