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The party having assembled and taken their places on the comfort- 

 able seats arranged in the grove, were called to order by Mr. Shutt, who 

 congratulated those present on the success of the day, and then called 

 on Dr. H. M. Ami, the geological leader, for the first address. The 

 doctor spoke as follows : 



The various geologic formations met can all be classified under 

 two heads, viz : I. Arclman ; II. Post- Tertiary or Pleistocene. 



i. Archaan System. Crystalline limestones constitute the most 

 prevalent rock at Galetta. They are for the most part light-coloured and 

 coarsely crystalline, oftimes assuming a decided coarsely saccharoidal 

 texture. This rock weathers dark, chiefly owing to the growth of 

 lichens, &c, and has been considerably used in the manufacture of lime 

 for local use. On examination the limestone is seen to contain minute 

 scales or crystals of mica, which are at times more extensively developed 

 and form masses of rock in which mica predominates. Graphite or 

 plumbago and iron pyrites also occur here and there in small quantities. 

 Chondrodite is also present in the shape of amber-coloured crystals. 

 This limestone thus would be a chondrodite limestone. The limestone 

 is traversed by numerous dykes of what appears to be a true syenite or 

 hornblendic granite. At times this rock occurs as a homogeneous paste 

 with orthoclase felspar, quartz and hornblende, in about equal propor- 

 tions, at other times the felspar and hornblende are separated and occur 

 in layers, the hornblende forming the line of weakness in a vein, then 

 next to this orthoclase felspar, then the homogeneous combination of 

 the two with a resinous gray-coloured syenite. Galena, wollastonite, 

 graphite, calcite, and mica, are associated with the crystalline limestone. 



2, Post Tertiary. Formations belonging to the glacial epoch, to 

 the later marine period and even to the still later period of elevation 

 are evident at Galetta. Boulder clays overlying the glaciated and 

 rounded hills, which are decidedly " moutonnees," are in turn capped 

 by marine gravels and clays and these to-day afford the rich soil of the 

 farms in the locality. Erratics may also be seen scattered in various 

 directions, some of them nearly ten feet in diameter, these indicate a 

 period when the Ottawa Valley was submerged and floating and shore 

 fee were amongst the agencies at work in transporting the boulders. 



