400 J. D. Dana—Taconie Rocks and Stratigraphy. 
sponding variations in an anticlinal flexure. (These figures 
are repeated on the map and numbered 52). 
b. Descriptions of Sections.—The figures on the accompanying 
map of Berkshire and in the text beyond represent some of the 
many sections observed in the region: and, as already ex- 
‘plained, they indicate also the kinds of rocks. The descrip- 
tions of the sections, as well as the numbering, here commences 
at the south. Numbers 1 to 21 are those already published in 
Part I. Of the 30 in this Part, figares 22 to 30 have appeared 
in my earlier papers on Berkshire, and are presented at this 
time only on the map; and I would refer to those papers for 
details with regard to the stratification.* 
Section 22 (map). In the Konkaput Valley, on its northeast 
side, at the southwestern base of the high land from which 
Bear Mountain rises; part of the section is south of the road, 
and the rest north of it; the latter part terminates in ‘‘ Devany’s 
hearthstone quarry’ (not now worked) which is situated a 
little to the eastward of the line. The several alternations of 
quartzyte and mica schist with limestone, the micaceous char- 
acter of much of the quartzyte, and the small dip northeastward 
are the interesting points. 
Sections 23, 24 (map). On the southwest side of the same 
Konkaput Valley opposite the locality of the preceding section, 
at the base of the high ridge. In section 23, the limestone 
does not appear at bottom, the soil covering it; but farther . 
south, along the base of the same ridge, sections occur like 24, 
showing the true relations of the limestome to the quartzyte 
and the overlying mica schist; the rocks are like those of sec- 
tion 22, but the dip is reversed as if opposite parts of an anti- 
clinal. The localities are in the southeastern part of the town 
of Great Barrington. 
Section 25 (map). Just east of the Housatonic River at the 
village of Great Barrington, extending eastward from the lime- 
stone in the valley at the base of the high ridge (with a fault 
separating it from the rest), to the top; a gneiss-like rock 
below, a micaceous quartzyte at top. 
Section 26 (map). West of the village of Great Barrington— 
a ridge consisting of arenaceous mica schist, micaceous quart- 
zyte and bedded and non-bedded quartzyte. Limestone makes 
the western high part of the ridge opposite the village. Unfor- 
tunately, no section of the north end of the ridge is open to 
view. 
Section 27 (map). Section 27 crosses a low N.-S. ridge just 
northwest of Vandeusenville (three miles north of Great Bar- 
* This Journal, vols. v and vi, 1873, and xiii and xiv, 1877. The locality of 
each section is marked on the map by large numerals corresponding with the 
numbering of the figures here used. 
