Preliminary Report on Gowganda Mining Division District of Nipissing Ontario

by W. H. Collins

Of little importance are the sands and gravels of glacial origin which lie thinly in the depressions and lower lands of the present glaciated surface.

TABLE OF FORMATIONS.

The geological events may be briefly enumerated in ascending order as follows:—

Deposits of glacial débris and weathering products of present surface.

Erosive period with glaciation.

Diabase intrusions.

Huronian sedimentation.

Erosion period.

Laurentian intrusion.

Keewatin.