REPORT OF THE DIRECTOR AND STATE GEOLOGIST 1900 r79 



Ti02 



P2O5 



CI... 



F..., 



CT2O2 



MuO. 



BaO 



1 

 3.6 

 .06 

 .21 



.06 



.04 



2 



3 



4 



5 



6 



.03 



.07 









.39 



.18 

 .26 

 .06 

 ace 







.03 





trace 



.46 



.1 



.23 



.04 



.13 





.05 





Total 100.06 100.2 



0=C1 & F 05 .14 



99.73 99.87 100.22 100.05 



100.01 100.06 



1 Gabbro, Hopkinton; analysis 2 of original table. 



2 Olivin diabase, very fresh, olivins not perceptibly serpentinized; Bel- 



mont toAvnsbip, Franklin co., near Clinton county line and li miles 

 southwest of upper end of Upper Chateaugay lake; dike 13, Frank- 

 lin CO. 



3 Augite syenite, Loon lake; analysis 11 of original table. 



4 Syenite porphyry. Rand hill, Beekmantown, Clinton co.; dike 27, Clinton 



CO. Described in Geol. soc. Am. Bui. 9:248-50. 



5 Quartz augite syenite, Willis pond; column 14 of original table. 



6 Quartz syenite porphyry, Rand hill; dike 28, Clinton co. Geol. soc. Am. 



Bui. 9:248-50. All analyses by E. W. Morley. 



NOMENCLATURE 



During the last field season a trip was made into Canada for 

 the purpose of seeing the pre-Cambrian rocks to the north of 

 those in the Adirondacks and for making comparisons between 

 the two areas.^ A desire of some years standing was thus grati- 

 fied. The district visited, in Hastings and Renfrew counties, 

 Ont., is a most interesting one. As the report of Dr Adams and 

 Dr Barlow on it has not yet appeared, any detailed comments on 

 the geology would be manifestly out of place. The main purpose 

 of the writer was to see the rocks included by the Canadian geo- 

 logist in the Grenville series and in the fundamental gneiss, in 

 order to determine whether either, or both, of those names could 

 with propriety be applied to the Adirondack rocks. The region 



^This trip was made in company with, and under the guidance of 

 Dr A. E. Barlow of the geologic survey of Canada, and was made pos- 

 sible through the courtesy of Dr G. M. Dawson, the director of that survey, 

 and of Dr F. J. H. Merrill, New York state geologist. To all of these 

 gentlemen the writer wishes to express his great indebtedness. 



