Page 145 - Bulletin 11 2007
P. 145
142
Fig. 3.17: Closely-spaced boreholes in the face of the abandoned Lake View Quarry in quartzitic sandstone of the Peninsula Formation. These were drilled for feather-wedging of sandstone blocks using a hammer and chisel. Note the presence of cross-bedding and a large grey mudstone clast next
to hammer, possibly derived from the bank of an ancient river at the time of sedimentation.
