BURR: MELAPHYR OF BROOKLINE, BRIGHTON, AND NEWTON. 69 



EXPLANATION OF PLATES. 



PLATE 1. 



Fig. 1. Microphotograph of thin section from upper contact of melaphyr at 

 carriage-house quarry, Allston. (Plate 2, Loc. 15.) Shows bedding of 

 slate cut and contorted by tongue of igneous rock. 



Fig. 2. Microphotograph of thin section from upper contact of melaphyr at head 

 of Allston Heights. (Plate 2, Loc. 16.) Shows bedding of slate cut 

 irregularly by igneous rock and obliterated on contact. Detached frag- 

 ments and tongues of slate drawn into melaphyr. 



PLATE 2 

 Map of a part of Brookline, Newton, and Brighton, Mass. 



