44i Dominican Sf.ctions — Maury 25 



Sketch Map, Bulletin 29, facing page 10, Nos. 9 and 16. A view 

 of the river, taken by Mr. Schmidt, showing Zone H is given in 

 this Bulletin, Plate 3A. 



Section at Cana 

 This exposure occurs just above the ford of the Mao to 

 Guayubin road at Cana. 



Feet 

 Bluff composed of hard, blocky, blue clay weathering yellow. 

 Cracks filled with gypsum. Fossils include Serpulorbis pap u- 

 losa and Placunanomia lithobleta. Thickness about 50 



Both the species mentioned are at Bowden. Scapharca patri- 

 cia was found in the river debris but not in situ. 

 Section at Cain} i to. 

 This section is furnished by the successive bluffs extending 

 along the river from two miles below to two miles above Caimito. 



Feet 

 Bluff two miles below Caimito. Argillaceous limestone with tubes 



of Teredo incrassata. Thickness 10-15 



Heavy, sandy clays, Fucoids with Bryozoa, followed by gravels. 



In all about 30 



Upper Scapharca patricia bed 1 



Clay 4 



Middle Scapharca patricia bed 1-2 



Yellow sand)' clays 20-25 



Lower Scapharca patricia bed 1-2 



Yellow unfossiliferous clays 15 



Olio n e 1 a y e r 1 



Light yellow unfossiliferous clays 15 



Ligni tic layer 1 



Lignite with Scapharca patricia 2 



Gravels 3 



Concealed. 



Zone H at the ford, Sabaneta to Cercado road, Caimito. 



Low exposures of blue and green clay, gravelly clays and pure 



gravels. Fossils in lenses. Amauropsis, Neverita nereidis, 



Scapharca Willardausteni, about 50 



Bluff farther up the river, composed of uniform hard clays with 



lines of large concretions. (See Plate 3A). Unfossiliferous 



except for a few Tellhicc. Approximately 35 



Gravels with compound corals at the top. Corals bored by Petri- 



coia, Botula, Lithophaga, Corailiophaga. About 15 



