ELISHA MlTCHELIy SCIEJNTIFIC SOCIETY. 64 



the west; for these are supposed to be later intrusive 

 bosses. 



That others of these schists, particularly the chloritic 

 varieties, are metamorphosed, sheared eruptives seems 

 most probable. They are even porphyritic and brecciated 

 in places. In fact Kmmons hints at such rocks in his 

 description of his Upper Taconic chloritic member, when 

 he says: "These beds may be mistaken for trap, being- 

 g-reenish and toug-h, and besides like trap, the broken 

 strata become concretionary and exfoliate in concentric 

 layers." (Pag-e 59.) This subject will be recurred to 

 later on. 



Tlie Monroe Slates. At Monroe, in Union county, a 

 considerable area of truly bedded and but little indurated 

 or metamorphosed slates was discovered. Similar slates 

 were also found at the Parker gold mine near New 

 London, Stanlv county, at the town of Albemarle in Stan- 

 ly county, and at the Sam Christian gold mine in Mont- 

 gomery county. Thus they presumably cover a large 

 area in the southeastern portion of the Carolina Slate 

 Belt. In the fresh condition this slate is black, weather- 

 ing to dark and light drab, greenish and even reddish 

 colors. At the railroad station (Monroe) it lies in a low, 

 gently undulating anticlinorium. Several hundred yards 

 south of the depot the strike is N.85°E., and the dip is 

 30°S.E. At a point \ mile north of the depot it is finely 

 banded and lies nearly horizontal. It has been quarried 

 here for use as paving blocks in Monroe. 



That these slates are of sedimentary origin and of later 

 age than the slates and schists to the west and north can 

 scarcely admit of doubt. They are reported to dip under 

 the Jura-Trias congdomerate at Polkton, about 20 miles 

 east of Monroe, and might be looked upon as Uower Pal- 

 eozoic; but the absence of -fossils (at least so far none 

 have been found, though a careful search is certainly 

 warranted) must, for the time being, place them provis- 



