Transactions of the American Philosophical Society Volume 15

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1881 Excerpt: ...its place being taken by their bedded sandstones. These first dip at very high angles to the south, but gradually assume lower dips, and the higher one climbs the hill the lower he finds the dip of the strata, until near the summit the limestone is found clipping the hill and dipping southward at low angles. I was not able to measure it with certainty, but it is not far from 20 The limestone shows only its edge on the north face of the mountain, and although it is unusually compact, differs in no other important respect from the same beds elsewhere. On the south face of the range it is cut through by the stream along which the road runs, and near the base it is seen to be underlaid again by the same rocks as on the north side. Beyond the base of the hill a long gradual slope of gravel, the wash from the arroyo, borders the valley and is, as usual in this region, densely overgrown with cactus and acacias. The high angle to which the sandstones are uptilted on the north side of the mountain, while unusual in this range, is not entirely peculiar; nor does the disturbance necessarily extend to a great distance. A similar upheaval will be described north of Moca which not only does not affect either side of the range greatly, but is actually reversed in both the adjoining sections. The next pass east of the one just described is the one most travelled in crossing the mountains. It begins nine miles west of Santiago, at Limon, crosses the range west of the high peak of Diego Campo, and passing Alta Mira and the head-waters of the Isabella River, crosses the lower spur on which is perched Mount Isabella de Torres, and descends to the plain near Puerto Plata. Its entire length, including the nine miles in the valley, is forty-one miles, and the thirty miles of moun...