OF SAXTO DOMINGO. 171 



two luincli-ed feet high on the hill sides, show beautifully the bedding of the strata, 

 and prove that in the spaces between the edge of the hills and the present site of the 

 town of Moca the upheaving forces must have had full play. But the limited extent 

 of their influence is proven alike by the nearly undisturbed condition of the forma- 

 tion between Moca and Santiago, and by the southern dip of the beds on the south 

 flank of Palo Quemado Mountain, hardly a dozen miles distant to the west, and on 

 the Macoris Pass, barely more than twenty miles east. Ascending the mountain the 

 dip continues to the north, gradually becoming lower, while the rocks are passed in 

 the usual ascending series until near the top, instead of the white limestone heretofore 

 found capping the ridges, we And a white highly calcareous marl with casts of fora- 

 minifei'a and a few very rare moUusca of species abundant in the blue shales of the 

 valley and more common still in the brown shales of Gruayubin. Here the dip is so 

 low as to seem horizontal, though from finding the same rock further north at lower 

 levels it is probably at very low angles northward. 



Descending the hill to Jamao we again descend in the section and find sandstones 

 and brown shale cropping out in the valley. After crossing the river there is a low 

 ridge of the same brown sandstones and shales with very low northern dips, suc- 

 ceeded by a nearly horizontal very thick bed of cream-colored limestone forming the 

 outermost foot-hills at Batei. In this, I found a fragment of a badly preserved 

 Pecten, too imperfect for specific determination. Here this limestone is worn into a 

 well-marked ancient terrace apparently of the era of the coast limestones which abut 

 against its base. 



At Batei I picked up in the soil a whitish granitoid rock composed of white quartz 

 and feldspar, and small but remarkably distinct ciystals of a silver-gray mica. It 

 was but slightly rounded on the angles as if not transported very far. But I have 

 never seen a similar rock on the Island. It is probably from same small dyke in the 

 mountains. 



Fi'om Batei to the Rio Jobo is a continuous sand beach after leaving the vicinity 

 of the houses of the former place. But on the east side of the J obo a new style of 

 coast begins and continues almost uninterruptedly to Samanti. The hills come down 

 to the coast and the trail runs along strips of sand, then over a hill through bushes and 

 over I'ocks to repeat again the same story of sand, bushes and rocks, until the weary 

 ti-aveller is heartily glad to reach the miserable little hamlet of Matanzas. The last 

 route eastward where a trail crosses the range and consequently where a section can 

 be obtained is from the north of the Jobo River, up its caiion and across to Macoris. 

 The trail from Macoris to Matanzas is of no geological value since it runs almost ex- 



