238 C. D. Walcott — The Taconic System of Emmons. 



the eastern and western side of Mt. Anthony, on the line of 

 strike of the Taconic range. The strata of Mt. Anthony are 

 conformable and form a southwardly-sloping synclinal of lime- 

 stone and marble, carrying, above, a considerable thickness of 

 shales. On the west side the limestones dip eastward and are 

 well exposed one mile south of the Hoosic post office, N. Y. 

 About 400 feet of limestone are shown in the section, and, near 

 the upper part of it, shales appear which have a schistose 

 structure. The shales are in thin beds alternating with the 

 limestones at first, and then they increase until the interbedded 

 limestone disappears and the typical Taconic " talcose slates" 

 of Emmons are the prevailing rock. In the limestones, nearly 

 200 feet below the shales, a stratum of limestone from two to 

 four feet in thickness is crowded with shells of the genera 

 Maclurea and Murchisonia. The limestone is compact and 

 hard, so that sections only of the shells could be secured. To 

 any one conversant with the Trenton- Chazy limestones of 

 Washington County, N~. Y., both the lithology and fossils of 

 the Mt. Anthony limestone, at this point, would prove the 

 geologic horizon to be that of the Trenton- Chazy. Crossing 

 the mountain to the eastern side, at a point three miles south 

 of Bennington Centre, Yt., abundant fragments of crinoids 

 occur in a dark bituminous limestone, above a band of clouded 

 marble. In fig. 5, a few sections of a column 

 rr ^~ — r. — «^ is shown and also the calyx and portions of 

 the arms of a crinoid, allied to Homocrinus 

 gracilis of the Trenton limestone of New York. 

 Above the dark shale and dipping westward 

 with it, there is a band of arenaceous limestone 

 upon which I noticed a fragment of an Orthoce- 

 ras, an Euomphalus-like shell and sections of 

 what appeared to be a Khynchonella. This lime- 

 stone is lithologically similar to that conformably 

 overlying a bed of marble that dips toward and 

 passes beneath Mt. Anthony at a quarry, two 

 miles west of Bennington Centre. 



I next visited the limestone at the entrance of the Hopper 

 on the north side of Graylock peak, a typical locality of Dr. 

 Emmons's. The limestones and marbles are of the same litho- 

 logic character as those of Mt. Anthony with the 

 exception of the bituminous limestone, carrying the 

 crinoids. Several traces of fossils were observed, 

 but only one that could be recognized. It appears 

 to be the inner whorl of a gasteropod related to 

 Euomphalus or Maclurea (fig. 6). 

 Having verified the stratigraphy as published by Dr. Em- 

 mons and Professor Dana, and having found Trenton-Chazy 

 fossils in the marble belt, I crossed the Taconic range to its 



