Plate 9 



Upper ligure. Xonconformable (igneous) contact of amphibolite against 

 garnet gneiss. Note schistosity of gneiss at base of the exposure dipping 

 toward the amphibolite, and apparently cut by it. Looking east-southeast. 



One and four-tenths miles south by west from Pierrepont, about 150 yards 

 east of road. 



Lower figure. Photomicrograph ; enlargement 67 diameters, nicols crossed. 

 Alteration of augite to hornblende in gabbro-diorite. In central right hand 

 part of the plate is a subcircular anhedron of augite, bordered on the upper 

 side by secondary hornblende; the two contrasting types of cleavage are 

 imperfectly shown. 



One-fourth of a mile due south of upper Pyrites bridge. 



