TALCOSE SCHISTS. 431 



the slates and schists dipping to the west, and therefore will crumble away equally with 

 the slate, and would render the whole about perpendicular, did not fragments of the 

 schists drop down from above and protect the limestone from rapid decomposition. The 

 height of Mt. Anthony in Bennington is 2688 feet above the ocean ; of Equinox Mountain 

 in Manchester, 3706 feet ; of Mt. Eolus, 3298 feet. 



Passing into Arlington, we find a break in this mountain range, to allow the passage of 

 the Battenkill River to the Hudson. There is a break in the schists, also, as the river 

 flows over limestone. The limestone probably extends west of Equinox Mountain, 

 also, to connect with the limestones in West Dorset. Thus Equinox Mountain and Red 

 Mountain will constitute a great outlier, unless it be possible that limestone be found be- 

 tween them, when there would be two outliers instead of one. This outlier probably is 

 in the form of a synclinal axis. 



An immense amount of rock has been removed between Equinox Mountain and Mount 

 Eolus, even enough to form a valley more than 2000 feet deep. 



Mt. Eolus is capped by talcose schist, in the form of a trough ; and this mass of schists 

 is isolated from the principal range by erosion. A deep gap has also been made in the 

 formation by the same agent around the whole of the mountain into the west part of 

 Danby. Here the lofty range of mountains, capped with talcoid schists, terminates, but 

 the schist continues on to Clarendon, after a slight interruption, gradually tapering to a 

 point. It is quite clear that this narrow range connects with Danby Mountain, from 

 which it is now separated by a fault. The presence of an interval between the two rocks 

 now is due to erosion. Danby Mountain terminates as abruptly as if it had been broken 

 off square, for a width of three miles. The unusual height of the mountains, and the 

 great thickness of neai'ly horizontal strata composing them, readily suggests the idea of 

 their elevation. The mountain (including, also, Equinox, etc., to Greylock) must have 

 been raised directly up without pushing the strata either to the right or the left. 



The rocks in the deposit running north from Danby, present the same general character 

 as those of the elevated ground. A little west of Barneyville the talcose schist appears 

 dipping at an angle of only 17, under the limestone, soon it is perpendicular, and then 

 clips east again. It is very highly silicious. Near Danby Corners, it assumes more of an 

 argillaceous appearance, dipping 20 E. The line of the fault is nearly along the general 

 course of the river that rises in Danby Pond. Upon the hill east of the Corners, the rock 

 is argillaceous and slaty, much jointed and slightly plumbaginous. It overlies a dark- 

 colored limestone containing a few encrinites. Upon the same ridge in the north part of 

 Danby, it is schistose and broken up into cuneiform masses approaching quartzite in its 

 appearance. In the southeast corner of Tinmouth, the same imperfect decomposing rock 

 appears : but it has changed its character very much in the southwest part of Wallingford. 

 No one could ask to see a better characterized talcose schist than this ; but it becomes 

 argillaceous near Adair's marble quarry, standing nearly perpendicular. 



It is doubtful whether this schist extends into Clarendon, though a ledge of it was 

 found intcrstratificd with quartz rock in the north part of the town. A map of this 

 region, that may afford light upon the position of all these rocks, is given on Plate VIII, 

 Fig. 2. 



Although one great range of mountains has terminated, another and more permanent 



