216 «8S. D. Dana—Taconic Rocks and Stratigraphy. 
16, near the north end of the mountain, and about 500 yards 
(by pacing) from the road ; and fig. 10, the same at 15. 
e small limestone areas in the Mt. Washington region west 
of Lakeville, and which are probably, as observed in the Mt 
Washington paper, decapitated anticlinals, are situated near, 
and north of, the upper road to Miller- 
ton. .The quarry of limestone with 
overlying schist represented in figure 
3 of that paper, occurs in area 1; the 
locality of fig. 4 is along the road at 
2; and that of 5 in the field at 3, 
where a narrow strip of schist sepa- 
ae rates this area from No. 4. e areas 
4 and 6 are probably parts of a single anticlinal flexure, the schist 
of which still remains over a middle portion. Area 9 is in the 
of a brook near a fence which follows the New York 
boundary, a short distance north of a bridge over the brook, 
and about 1,000 yards (by my pacing) north of the carriage road. 
Area 8 is a doubtful one, since the only outcrop of limestone 
found was small, and it may be that of a loose mass; yet the 
ore-bed* and the flat valley south of it are pretty good addi- 
tional evidence as to the existence of limestone beneath. 
Southward dips alternating with eastward occur in the 
southern extremity of the mountain at outcrops along the road 
east and west of Lakeville and also to the north. 
The western lobe of limestone in southern Egremont extend- 
ing south into the Mt. Washington area may continue south- 
Ww. 
and-south line, near the eastern foot of Elk Mountain, 
there may yet be found a limestone ledge, as an old deed of 
property reserves the limestone. 
Il. The limestone underlies conformably strata of Quartayte, and of 
quarlzylic or arenaceous Mica schist. 
The limestone of Salisbury and Sheffield spreads eastward 
across the Housatonic River into Canaan and New Marlboroug 
and covers a large part of these towns. Mica schist is the or fi 
of many ridges within the limestone limits, as it is west of t ; 
Housatonic; but it isin most cases a much more arenaceoy 
variety, and it is not staurolitic. Quartzyte is the chief aor 
of many of the ridges; and it occurs both massive and of the 
* D. Cook’s, and bearing N. 50° W. from Mr. Cook’s house. 
