57 JOURNAL OF THE 



These fossiliferous beds are stated to be sometimes 

 auriferous. 



He is therefore disposed from the above facts, to place 

 all of the rocks not decidedly igneous, that is, those which 

 he regarded as stratified (though in reality the apparent 

 stratification is but schistose lamination), with the sedi- 

 ments. He then correlates these rocks with the taconic, 

 the infra-silurian sediments of Massachusetts, based main- 

 ly on "their lithological characters, and the relations in 

 which they are placed to the older rocks, and those which 

 they sustain to each other." In North Carolina^ he says, 

 these rocks have been derived from syenitic granites, 

 which he believes to belong to the primary or basal com- 

 plex. He makes two divisions, the Lower Taconic and 

 and the Upper Taconic, noting that the distinction be- 

 tween them, however, is less obvious in North Carolina 

 than in the northern equivalents. 



The Lower Taconic, "The Lower series will contain 

 the talcose slates, white and brown sandstone, or quartz, 

 which is frequently vitrified or cherty, and the granular 

 limestone and associated slates.^" 



The talcose slates are stated to be made up of talc and 

 fine grains of quartz, becoming a friable sandstone when 

 quartz predominates. Color and lustre silvery when 

 chlorite is absent, and greenish when chlorite is present. 

 The following varieties of these quartz rocks are given:^ 



"(1) A fine grained coherent quartz. 



"(2) A fine grained friable quartz. 



"(3) A finegrained micaceous and talcose quartz. 



"(4) Vitrified quartz or chert, (a) green, lilue, (b) aga- 

 tized. 



"(5) A cherty or apparently porphyrized quartz., which 

 contains feldspar, which decomposes and leaves a rough 

 porous mass similar to burrhstone. 



Ubid, p. 49: Ibid, p. 51 

 2 Ibid, p. 55. 



