804 THE JOURNAL OF GEOLOGY. 



almost circular shape, surrounded by high hills. 1 It has not, how- 

 ever, the appearance of a crater. In the centre of this is a low, 

 flat, circular rocky eminence, about 10 m. high by 80 m. in diam- 

 eter, composed of a much decomposed pulverulent eruptive 

 rock, originally probably a dacite, carrying many small rounded 

 segregations. Here we have undoubtedly a late centre of erup- 

 tion. The ridge separating this plain from the sea on the east 

 is covered with large angular blocks of dacite, while the slope 

 below is composed of a dacitic breccia, the cement being a fine- 

 grained tuff-like paste of the same materials. 



There remains to be described one more locality which, for 

 several reasons, offers the most important and interesting features 

 of any on the peninsula. This is the hill lying on the northwest 

 coast, east of the limestone of Panagia, called Kaimeni (Burnt); 

 here we have the seat of the most recent eruption of the whole 

 /Egina-Methana region. 



The Kaimeni is a ridge about two km. long running north- 

 west from near the hamlet of the same name, forming a 

 promontory in the sea. Its highest point is 416.9 metres above 

 sea level and 206 metres above the small valley at its southern 

 end. 2 Its flanks, which have a slope of 37 , are composed of 

 large and small angular blocks of andesite with some scoria, the 

 latter being especially abundant near the bottom of the south- 

 west flank. At the top is an oval depression, 60 to 80 metres 

 deep and measuring perhaps 100 by 150 metres, its long axis 

 lying parallel with the crest of the ridge. The walls of this 

 depression are very steep, in many places perpendicular, of large 

 blocks of rock or solid cliffs split in places by wide cracks, some 

 of these being fifteen metres deep. The bottom is covered with 

 angular fragments of andesite. This hollow is undoubtedly an 

 explosion crater, but the character of the eruption need not be 

 discussed here. Beyond this crateral cavity the lava stream runs 

 to the northwest projecting into the sea. This seaward part of 



I This is not the circular "crater-like" plain described by Reiss and Stiibel (p. 34), 

 which lies to the northwest of Chelona, and whose crateriform character did not strike 

 me, though I passed through it.. 



2 R. & S., pp. 24. 



