FERS Nie APE TRO SET CREM TA ce te ee er ent Se ae nee ee eS a ree 
of the Specular Iron-Ores of Santiago de Cuba. 421. 
Obscure traces upon the first range of foot hills of still more 
ancient corallines, to which I shall again refer, point to a still 
more remote succession of uplifts whose vertical range — 
referred to the latest indicated level of coral formations, some 
100 feet below the present shore—may be estimated as about 
2300 feet. From the syenyte hills may have disappeared by 
subaerial erosion intervening corallines, between those of the 
present coast and the line of ancient, and now metamorphosed, 
corallines traced along the contact or southern margin of the 
dioryte mantle. 
of once powerful streams occupy deep defiles of 
the foot- hills further attesting hydrographical changes of such 
a scope as may be believed to be commensurate to “the degree - 
Mi ASAE A elevations of the Sierra. Such defiles are the 
rroyos Negro, Cafidad, La Plata and Berraco. The dry and 
Sat filled up Laguna of Berraco, so-called, some fifteen miles 
east of Santiago ee and a few feet above ag spores to 
a former indentation of the coast at the mout at appears 
to have once been two of the largest streams of fa south slope 
of the coast range. 
the unde sie centers in the form of cores. At the 
surface, where freed from their interstitial products of decay, 
he 
least resistance corresponding to its j nting, is indicated by 
