SKETCH OF ^EGINA AND METHANA. 799 



date from Hellenic times, is now quite inaccessible. Much of the 

 eroded material is now to be seen forming a terrace to the south 

 and southwest of the dome, probably the " sol boml >/" of the 

 French geologists. 1 The deeper erosion of the southern part is 

 explained by the fact that Spasmeno Vouno is formed on the 

 southeast flank of the more compact Palaeochora dome, the easily 

 eroded mass of the later outflow being hence deeper toward 

 the south. 



The central part of the island is separated sharply from the 

 districts just described by a straight, rather broad valley running 

 about east and west almost across the island, at the bottom of 

 which there flows during the wet season a small stream. In its 

 western part the lower part of this valley is cut in the light 

 hornblende-andesite breccia, while further east it is in limestone. 

 This central part of y£gina — the Monastery District — is chiefly 

 composed of two parallel ridges, having a trend of about North 

 6o° West. The most northerly, called (at least its western half) 

 Mt. Chondos (Near Mountain), runs almost clear across the island, 

 ending at the east in Cape Peninda. Its sides are steep (over 

 30 ) and the upper parts bare and rocky, while the lower slopes 

 are often devoted to vines. As seen from the map the lower 

 part of the north slope is composed of a hornblende-andesite 

 like that of Stavro, while the rest of the ridge is chiefly com- 

 posed of a compact hornblende-augite-andesite. The relation 

 of the two could not be clearly made out in my somewhat 

 hurried trips, but it seemed probable in places that the former 

 rock overlies the latter. On the north side, near the west end and 

 opposite Mt. Stavro, are beds of gray, pulverulent, fine-grained 

 tuff which overlie the fringing andesite breccia. The clip of 

 these beds varies, in one place being 30 southeast, while in 

 another they are horizontal. A bed of compact brown rock 

 which seems to be silicified tuff is also found farther east near 

 the crest of the ridge, and according to Reiss and Stubel 2 a tuff 

 occurs near the base of the east end, south of Mt. Paliango. A 



! B. & V., 254. 

 2 R. & S., p. 17. 



