THE HAWLEY SCHIST. 165 



111 continuation eastward of tlie seetion of the Savoy schist given on 

 page 161, one finds that the barren Savoy schist is followed by a great devel- 

 opment of araphibolite (1,640 feet thick), the upper half made up almost 

 entirely of this rock, the lower part containing some unimportant beds of 

 sericite-schist and biotite-schist, and layers of a coarse, yellow sericite- 

 scliist with "fasciculite," and all grading into amphibolite. The prevailing 

 rocks are: {<>) a dai'k-brown hornljlende- (eummingtonite-) schist, with very 

 fine lamination, which is brought out more distinctly by weathering; (/>) a 

 gray, micaceous hornblende-schist; (c) layers of very fissile chlorite-schist. 

 This is followed by a series (656 feet thick) of thin-fissile, very fine-grained, 

 friable, dark-gray mica-schists, made up almost wholly of nmscovite, and 

 without accessories; this band can be followed clear across the town of 

 Worthiugton and lies beneath the undoubted flaggy schists of the next 

 series (Goshen), to which I have usually, but with some hesitation, referred 

 it. The Avhole thickness is 2,296 feet. 



The above distances are approximate, being measured along a nearl}- 

 straight east-west road, the strata being vertical and striking north and south 

 Across Cummington the beds abound in fasciculite, chlorite, and scattered 

 grains of ankerite, or of rust spots which mark the removal of the latter. 



Fifty rods east of A. W. Brown's sawmill, near the west village, these 

 sericite-schists with fasciculite and ankerite are followed on the east by 

 thin-bedded, light, sandy mica-schists, and these by a thin lied of porphyritic 

 amphibolite, above which are 50 rods of graphitic pimpled schists, which 

 one must associate with the Goshen mica-schist; then comes a 2-foot 

 layer of amphibolite, and then the Goshen mica-schist continues eastward. 

 This is the beginning of a new peculiarity, at the boundary lietween the 

 two series, which continues and gi'ows more marked northward — a heavy 

 bed of amphibolite near the top of this series, another equally heavy, but 

 of different habit, occurring near the bottom of the higher series, and Ixitli 

 increasing in thickness northwardly. Across Plainfield and Hawley the 

 conditions remain unchanged. The main bed of ampliibolite at the top of 

 the Hawley series grows thicker, and is, I doulit not, more continuous than 

 can be made out from the outcrops in this drift-covered region. (_)ther 

 beds of amphibolite occur lower down, and the beds carrying chlorite, 

 fasciculite, and aiikerite increase, so that, measured across the middle of 

 Hawley, thev occupy a full half of the width of the town, and the series is 

 here at its widest. 



