Plate XXIII. 



Fig. 1, — illustrates tlie point of contact of two granites, the lower lialf representing 



. the intruding, young (biotite-) granite, the upper half, the iiitruded, older 



(hornblende-) granite. Feldspar and quartz at their contact are variously 



fissured, and the lines of fracture thus produced run a^'proximatcly parallel 



with each other. (8ee p. 242.) 



Fig. 2. — A bluish-green hornblende, forming an essential ingredieiit of granite. 

 (See p. 227.) 



Fig. 8, — shows a green hornblende with the imbedded grains of salite, each having 

 different optical orientations. (See p. 255.) 



Fig. 4. — Reactionary rim consisting of the grains and needles of epidote around a 

 decomposed biotite at the contact with feldspar. (See ps. 284 and 28Ö.) 



Fi(is. 5 and 0,- — represent peculiar I'orms of titaidte, resembling rolls of butter, with 

 opaque, formless masses of titaniferous iron. (See p. 25().) 



Fig. 7. — A somewhat large, allotriomorphic hornblende, enclosing a number of 

 equally allotriomorphic crystals of plagioclase, oriented in diverse direc- 

 tions. (See p. 227.) 



Fig. 8. — Black dioritic patches of various sizes enclosed in hürnl)lende-granite, as 

 if a dioritic scum had floated on a granitic paste, and then been torn 

 asunder by some movement in a semi-liuid magma. These patches are 

 only a portion of the same granitic inagina, slightly different in chemical 

 composition. (See p. 217.) 



Fig. *J, — shoAvs many stiff, disjointed needles of ? sillimanite. (See p. 220.) 



Fig. 10. — Crystalloids and grains of hornblende, enclosed by a feldspar. (243.) 



Fig. 11. — Section of the Nakagura valley, showing the heterogeneous nature of 

 schistose granite and the Upper Takanuki complex. (See p. 215.) 



Fig. 12. — Salite, a characteristic component of titanite-amphibolites, with black 

 streaks regularly arranged parallel with the c-axis. (See p. 254.) 



