71 From 69 to 71 the Archean grains form steep declivities although the dip of the same is SE as usual. A fault is assumed to run along this line, separating the Archean west of the mine from the lome stone east of the mine, cor- responding to the fault be- tween 64 and 67 farther south. In fact if the exposures north of 69 were examined I think further evidence that these two faults are really as could be collected.