. Annual report of the Regents. New York State Museum; Science. NEWARK ROCKS OF ROCKLAND COUNTY, N. Y. 33 Xorth of West Nyack the margin of the trap outcrop is more irregular than at any other point along its entire length in both New Jersey and New York. A spur of the ridge half a mile wide juts out to the west for about a mile. At the northern and south- ern ends of this spur there are smaller masses of trap, J mile in length, which may be connected with the greater mass, though separated from it by erosion depressions in the bottom of which all rock outcrops are concealed by glacial drift a
. Annual report of the Regents. New York State Museum; Science. NEWARK ROCKS OF ROCKLAND COUNTY, N. Y. 33 Xorth of West Nyack the margin of the trap outcrop is more irregular than at any other point along its entire length in both New Jersey and New York. A spur of the ridge half a mile wide juts out to the west for about a mile. At the northern and south- ern ends of this spur there are smaller masses of trap, J mile in length, which may be connected with the greater mass, though separated from it by erosion depressions in the bottom of which all rock outcrops are concealed by glacial drift and alluvium (c, c, fig. 6). East of Valley Cottage (d, fig. 6) numerous bosses of fine grained trap are exposed, in several of which masses of indurated, fine grained sandstone are imbedded. Some of these inclusions have a width of several feet. They are masses of the sandstone which. Fig. 6 Map of the region near Nyack. were broken off and incorporated into the upper part of the trap during its intrusion in a molten condition. Their occurrence is conclusive proof of the intrusive origin of the sheet. From Valley Cottage the boundary extends a little north of east, nearly parallel to the eastward bend of the basal margin at. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; University of the State of New York. Board of Regents. Albany : J. B. Lyon, State Printer
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Keywords: ., bookauthorne, bookcentury1800, bookdecade1880, booksubjectscience
