stripes
Occurrence number:
031-00-130
Country:
Canada
Region:
Montreal area
Location:
Longitude: -73.33, Latitude: 45.67
Carbonatite:
No
Three km to the west-northwest of the village of St-Amable are widespread exposures of a composite sill up to 13 m thick emplaced in Ordovician shales. Other outcrops occur to the west and southwest, particularly along the east bank of the St Lawrence River, but it is not clear if these represent the same sill. The rock is essentially a nepheline syenite of variable texture and grain size.
References:
CLARK, T.H. 1955. St. Jean-Beloeil area. Geological Report, Quebec Department of Mines, 66: 1-83.
Map:
Fig. 1_61 Distribution of alkaline rocks in the area of Montreal.
Location: