ANALYSES OF TYPES OF AMPHIBOLITE. 



303 



tion. No. IX is, however, certainly, and Nos. I, IV, and V are almost 

 certainly, derived from limestone. . There is therefore no reason from the 

 chemical side why they .should not all be so derived. 



Aiialyses of the amphibolites described in the precedhif/ chapters. . 

 [Analyst, L. G. Eakius."] 



I. Heath ; W. M. Sauford's. Porphyritic amphibolite in Goshen schist. 

 II. New Salem. Amphibolite associated with steatite. 



III. Leverett; gothic house east of village. Massive, coarse, altered diabase. 



IV. Whitmores Ferry ; Sunderland. Thin, shaly, aphanitic amphibolite of Conway age project- 



ing through Triassic sandstone. 

 V. Guilford, Vermont; shining-black, flaggy amphibolite; lung bed in Conway schist. 

 VI. Worthingtou; in Hawley schist ; nearly pure, matted, black hornblende needles. 

 VII. Bernardston; R.Park's. Black, heavy, massive hornblende rock. Devonian. 

 VIII. South Leverett. Ligniform, deep-green amphibolite. 



IX. Goshen; base of the ''anvil" formed by solution of the block of impure limestone, and thus 

 certainl.y derived from limestone of Conway age. (See p. 191.) 



In the accompanying plates (Pis. V, VI) I have brought together 

 types of all the amphibolites described in the preceding chapters for com- 

 parison with the table of analyses given above. The sections on PI. V 

 are certainly derived from limestone. The first two sections on PI. VI 

 have probably the same origin. The third section, from the Hawley schist, 

 and the fourth, which is from a bed adjacent to the great Chester amphibo- 

 lite, are of uncertain origin. 



