722 THE JOURNAL OF GEOLOGY. 



that a number of small limestone areas near Lakeville, in which 

 the strata are but gently inclined, are capped by a schist. This 

 schist he believed to be the same as the schist of the southern 

 extremity of the mountain. He says, speaking of these areas 

 (p. 272): 



" Since the limestone is the underlying rock, they are all, if not monoclinal, as is 

 hardly possible, small overturned anticlinals, which have had their tops worn off so as 

 to show the limestone beneath." * * * * * * 



" The synclinal structure of the mountain is apparent also along portions of the 

 southern edge of the schist. At Ore Hill, one and a half miles west of Lakeville, the 

 schist overlies limestone." 



On page 273 he says : 



" The ore-pits that have been opened about the base of Mt. Washington, fourteen 

 in number, are situated near the junction of the limestone and schist, and in view of 

 the facts that have been mentioned, this means — near where the limestone emerges from 

 beneath the schist." 



Referring to the dying out of the synclinal to the south of 

 the mountain, he says : 



" Again the pitch of the beds in the last three miles is southward in some parts, 

 instead of eastward or westward, showing a flattening out of portions of the synclinal 

 and subordinate anticlinals." 



" It thus appears that in the dying out of the synclinal, besides a flattening of por- 

 tions of the general synclinal and the introduction of southward dips, there was also a 

 multiplication of small subordinate flexures." 



" Farther there is a multiplication of ridges of schist in the limestone area." 



" Several such ridges, some quite small, are situated, as the map shows, south- 

 eastward of the mountain near the village of Salisbury ; and others occur farther east. 

 They consist of the same mica schist as the mountain, — they have generally an easterly 

 dip, often a high dip; and the facts seem to show that most of them are synclinal ^ flex- 

 ures ; that they occupy the troughs of local synclinals in the limestone ; * * * . 

 Most of them were, apparently, half-overturned troughs so pushed over westward that 

 the dip of the schist is generally eastward." ******* 



The following is quoted from a paper 1 entitled "Berkshire 

 Geology" (pp. 15-16) : 



" The Mt. Washington schists lie in a trough very much like that of Greylock, but 

 one relatively shorter in its narrowed part and reversed in position. In the northern 

 half the trough is a very broad shallow one, while to the south the east side is pushed 

 up westward." 



1 Berkshire Geology, by Prof. James D. Dana. A paper read before the Berk- 

 shire Historical and Scientific Society of Pittsfield, Mass., February 5, 1885. Pitts- 

 field, 1886. 



