Moose River Basin: geology and mineral potential - Geology Ontario

Mesozoic Stratigraphy
OGS10457
Photo 2.4-Photograph showing non-lithified, coarse, ferruginous sands of the Mattagami Formation at
Site A, north bank of the Missinaibi River, about 1 km downstream from the mouth fo the
Soweska River.
The main points to be emphasized at this stage are:
1. the Mesozoic sediments decrease in thickness to the north, i.e. away from the
margin of the Moose River Basin,
2. the northernmost confirmed occurrence of Mesozoic sediments is Ontario Ge
ological Survey drillhole 75-03 near Rabbit River,
3. no other evidence is available for areas east, west, and north of the winter
1975 drillholes.
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