Cii. XXIX.] . EFFECTS OF CALABRIAX EARTHQUAKE. 



1,^ mm 

 2/ 



by tlie first sliock of Febniarj 5tli, were greatly widened, 

 leiio'tliened, and deepened by the violent convulsions of 



March 



mile 



to 



and from 150 to more than 200 feet in depth, usually 

 straight but some of them in the form of a crescent. The 

 annexed cut (fig. 114) represents one by no means remarkable 

 for its dimensions, which remained open by the side of a 

 small pass over the hill of St. Angelo, near Soriana, The 

 small river Mesima is seen in the foreground. 



Formation of circular liolloivs and new lakes. — In the report 

 of the Academy, ^ve find that some plains were covered with 



Fig. lie. 



Circular hollows in the plain of Eosarno, formed by the earthquake of 1783. 



circular hollows, for the most X3art about the size of carriage- 

 wheels, but often somewhat larger or smaller. When filled 

 with water to within a foot or two of the surface, they 

 appeared like wells 3 but, in general, they were filled with 

 dry sand, sometimes with a concave surface, and at other 

 times convex. (See fig. 115.) On digging down, they found 

 them to be funnel-shaped, and the moist loose sand in the 

 centre marked the tube up which the water spouted. The 

 annexed cut (fig. 116) repi-esents a section of one of these 

 inverted cones when the water had disappeared, and nothin 

 but dry micaceous sand remained. 



