in the vicinity of Great Barrington, Mass. 267 
of the limestone westward under the slates of Mount Washing- 
ton may be traced along for four to five miles, even to the north 
extremity of the ridge R; and it characterizes also the high 
eastern summit, Mt. Everett, where the westward dip is 35° to 
60°. East of the extremity of the ridge R, the strike of the 
limestone has some westing, becoming first N. 15° W., and then 
N. 8 ., and the last is the strike just north of it. 
The limestone thus dipping under the mountain does not 
emerge short of the region of Copake in New York, and conse- 
quently the Copake and Sheffield limestones are the same stra 
tum—both, the Stockbridge limestone; and the limestone 
stratum, therefore, makes a synclinal. : 
But the slates of the ridge S, and also those of the Taconic 
7 ° 
Moreover, the limestone of Egremont west of the ridge R 
takes the steep easterly dip of the ridge 8, and the same also is 
eral pressure, from the eastward, beginning the downward — 
4mue east of the foot of Mount lager 08 made a ps 
whose bottom on the east inclines westward at a comparative'y 
ae ~hashi until its axial plane, like all the slate — in 
7 ° ° ite n ie) 3 
: pped eastward 50° to 70°. Then, qut with the same steep 
ington, the second synclinal, S, was made wi A sti 
inclination. The synclinals S and T become merge ges ge 
mass, in Mount Washington; and as the ‘i . 
appear at the summit, the intermediate anticlinal in gesagt 
tain was only an anticlinal of slate. In other words, the syn 
