SCIENTIFIC SURVEY. 251 



in Maine, these beds would have forever remained concealed. The 

 force in this region seems to have been exerted more powerfully 

 than in some other parts of the State. Now when this force be- 

 gan to act— supposing it to operate slowly and gradually— these 

 two kinds of rock were pushed up so as to form a very pretty an- 

 ticlinal curve of considerable width. As this agency continued 

 to crowd the sides of the anticlinal from the south-east, the dips 

 became greater and greater, until they become perpendicular, 

 standing side by side. The pressure at Ingraham's quarry seems 

 to have elevated the strata to this pitch ; while at Holmes' quarry 

 the force operated still further and inverted the fold, so that the 

 strata of schist all dip in the same direction, while the limestone 

 has not been inverted. Were it not for these masses of limestone 

 there would be no indication remaining of this anticlinal fold. 

 How many more such inverted folds may exist in this region we 

 have no means of ascertaining in the absence of such protuberant 

 masses as this limestone. 



An important practical inference results from this theory. If 

 these two projections of limestone indicate an anticlinal ridge, 

 then all along the line connecting these two quarries we may ex- 

 pect to iind more of the limestone. These quarries have been 

 opened on the very crest of the fold ; and there must be some ap- 

 proximation towards horizontality in the top of the ridge, and con- 

 sequently if not at the surface certainly at a short distance below 

 it, the limestone may be found. 



Several beds of Taconic limestone east of the principal Eolian 

 belt should be noticed. One of considerable importance is near 

 the east end of the principal street of Thomaston, to the south, 

 and was formerly worked as a quarry. The rock is whiter than 

 the common limestone to the north. It dips 25° N. 20° W. Its 

 limits are not known ; but it may ultimately be found to be a spur 

 from the grand deposit. 



Two beds are found upon Charles E. Butler's farm, upon the 

 north and south of his house, in the south-east corner of Thomas- 

 ton. The northern one is located on a bluff facing the Meadows 

 quarries ; an immense tract of lowland occupying the country be- 

 tween. An old quarry here was in a blue limestone similar to the 

 common rock of the other quarries ; while underlying it is a white 

 dolomite dipping 50° N. W. and resting upon the Taconic mica- 

 ceous schists and quartzite. The other bed is of the blue variety 



