644 



BROWN AND O CONNELL THE JURASSIC OF CUBA 



up from beneath the Miocene cover and are composed of Upper Jurassic 

 blue-black, thinly bedded limestones with intercalated shales. In pass- 

 ing westward along the base of the mountains several traverses were 

 made along south-north lines at right angles to the strike. The follow- 

 ing are a few typical sections : 



CANDELARIA SECTION 



A traverse from Candelaria northward for seven miles into the Organ 

 Mountains showed the following succession: At the base is a hard lime- 

 stone conglomerate about 50 feet thick, made up of limestone and 



Figdee 2. — Lusitanian and Kimmeridgian black Shales 



The exposure is along - the hanks of the Rio Hondo, within the Organ Mountain uplift. 



6 miles northwest of Candelaria. 



gneissic schist boulders and pebbles, the whole resembling a pudding- 

 stone. It usually forms a bed in the three branches of the Eio Hondo 

 and has in large measure determined the fall of these streams. Hard 

 gneissic schists are interbedded in this conglomerate with occasional 

 quartz. These rocks rest on faulted and folded, highly metamorphosed, 

 reddish sandstones, shales, and schists of late Paleozoic or Triassic age. 

 Overlying the conglomerate are about 75 feet of limestones with inter- 

 calated shales. These limestones vary from 4 to 6, to 12 inches in 

 thickness, are black, brownish black, weathering blue and, in eroded 



