ClTSHING — (tEoi.ouY OF ClINTOM CoTJNTT. 509 



7. Iron-grey dolomite, 1 ft. 



8. Blacki sir, impure limestone, abounding in Rhynchonella plena, . 36£" 



9. Grey, massive, coarsely granular limestone, mostly made up of 



crinoidal fragments, which are sometimes red, containing 



Rhynchonella, 26£" 



10. Same as No. 8, 32 " 



11. Measures concealed, 7 " 



12. Tough, impure dolomite, 8 " 



13. Measures concealed, 24 " 



157 ft. 



Total thickness of A, R and C 732 ft. 



In the southern part of the township the lower division of the Chazy is 

 widely exposed, especially toward the west, but it is much disturbed there, 

 and no section has been seen as good as that quoted. Running due south 

 from Chazy village, and lying just to the east of the territory included in 

 their map, is a long section of slight dip, extending unbroken from the Calcif 

 erous up into the basal Trenton, though much of the upper and lower 

 divisions of the Chazy are not well exposed. It is the only section in the 

 county, except the one on Valcour Island, which shows the entire Chazy, 

 but it is not well adapted for a determination of the thickness on account of 

 the slight dip. 



Some layers of the Chazy were formerly quarried in the township for 

 building stone, but the industry has lapsed, probably because of the better 

 quality of stone obtainable from Isle la Motte. 



Black Hirer limestone. Nowhere else in the county has this rock been 

 found well exposed, but it is admirably shown around Chazy village, and is 

 quarried and burned for lime on a large scale. It is a compact, ringing, 

 massive black limestone, much of it with conchoidal fracture, and has a thick- 

 ness of thirty feet. It is quite fossil if erous in some layers. A bed twenty 

 feet from the base contains a large Machirea and masses of Stromatocerium, 

 much like the Chazy forms, so that when this layer alone is exposed, it is no 

 easy matter to distinguish the two. Cohimnaria is confined to one or two 

 Layers just beneath the Maclwea bed. Beneath the beds are rather barren, 

 but hold Asaphvs gigas and lamellibranchs identical with Trenton forms. 

 At the base is a LeperdHtia layer, and the whole rests on a massive, brittle, 

 dove-colored limestone, with conchoidal fracture, which forms the summit of 



