346 A. Wing's Discoveries in Vermont Geology. 



Moreover, other facts give us the age of the slates. " For the 

 limestones at the northern terminus of the slate seem to dip 

 down around under the slate. The limestones on the west dip 

 eastward beneath the slate, and so do the slates and limestone 

 beds on the east the slate being an inverted synclinal and the 

 limestones abraded anticlinals. Indeed, one of the fol< 

 slate shows the limestone continuing around under the syncli- 

 nal axis of the slate." "The evidence is plain that the slates 

 are decidedly the more recent." Moreover, thin beds of lime- 

 stone in the slate actually contain Trenton fossils (p. 339). - 



The fact that the slates overlie the limestone, and are there- 

 fore Hudson Eiver slates, is further shown in the direct and 

 nearly horizontal superposition of the latter by the former in 

 several high summits south of Eutland, as in Mount Dorset or 

 Eolus in the town of Dorset; Dauby Mountain, on the borders 

 of Danbv and Dorset, just north of Eolus ; Equinox Mountain, 

 in the town of Manchester, the town next south of Dorset; in 

 Spruce Peak, in Arlington, to the southwest; in Mount 

 Anthony, in Bennington, farther south; and in Gray lock, in 

 northern Berkshire, in Massachusetts. 



The Vermont Geological Report mentions, on tin- ai 

 determinations by Professor Hall, the occurrence in the Eolian 

 limestone of a species ot Eu<riP[thilii« in Midburv and also in 

 Whiting; of a Zaphrenth in Sudbury, and also* in Cornwall, 

 h species of Euomphalvs and Chcetetes ; of Sfr<>/i><>t"/' ■f<' 

 in Sudbury. Orwt il and (ornw dl, and in Kast Mi Idlebury, Bran- 

 don, New Haven and Williston ; of large Encrinal stems in Sud- 

 bury and Cornwall; of a species of Stietopora "remarkably well 

 defined" in Sudbury. 



The Vermont Report gives also the par- 

 the stratification in the above mentioned mountains, with sec- 

 t ional views of" some of them, which are here reproduced. Mount 



lying in a very shallow synclinal 1,960 feet < 



Spruce Peak. Arlington. 

 Danby Mountain is a continuation northward of the same moun- 

 tain. with the same structural conditions, but with the slate, 

 I to a rougl trigon< (Vt. Rep., P- 



. In Mt. Equinox, which is 3,87-2 feet m 



as in Mt. Eolus." In Spruce Peak, Arlington (fig. 11)," the slates, 



