524 
GEOLOGY OF THE FIRST DISTRICT. 
“ The minerals enumerated: \st, those belonging to the island; 2d, those from other 
sources. 
I. Those belonging to the island of New-York. 
1 . Quartz crystals (inferior specimens). Small crystals, in the Harlem railroad cut, under the track, 
in veins of gneiss, about 122 d-street. 
2. Rose quartz (inferior specimens). From the same place; the locality being covered up, no more 
specimens can be obtained. 
3. Epidote. Very small crystals of a deep green color, in hexagonal prisms, in veins of half an inch 
wide, in gneiss, at Thirtyeighth-street, on the banks of the East river, in the southeast part of a 
gneiss quarry. 
4. Tourmaline. In hexagonal prisms, in granite beds or veins in various parts of the island. Many 
fine specimens were obtained in opening the Harlem railroad. 
5. Brown garnets. With twenty-four trapezoidal faces, very imperfect; abundant in the gneiss on the 
shore of the Hudson, between Fortysecond and Fiftieth-streets, and in boulders in every section 
of the island. 
6 . Hydrous anthophyllite. Already described; very abundant. 
7. Serpentine. Intermixed with white limestone, and of granular structure; described with the last, 
and from the same locality. 
8 . Red stilbite. In small quantities, in veins of gneiss; in small scopiform fibres of a reddish yellow 
color. From the railroad cut near the tunnel; the locality is exhausted. 
9. White pyroxene. In four-sided tables, in veins in limestone at the abandoned quarries at Kings- 
bridge, at about 208th-street, five rods west of the Kingsbridge road. 
10 . Fetid felspar. Of a bluish white color, in tabular masses in limestone at Kingsbridge, Thompson’s 
quarry near 196th-street, and about one hundred yards west of the road. 
11. Iron pyrites. In exceedingly small cubic crystals, throughout the island, in the gneiss and in the 
limestone at Kingsbridge. 
12. Tremolite, white. In the abandoned quarries of limestone at 208th-street, west of Kingsbridge 
road. 
II. Those from other sources. 
1. Mesotype. In cavities and veins in greenstone. 
2. Datholite. From the same source. 
3. Apophyllite. Also from same source. 
4. Chlorite. Same source; found in small quantities. 
“ All of this last class have been found in small quantities in veins in the boulders of 
greenstone, barely sufficient to determine their characters.”* 
Prof. L. D. Gale, Third Annual Geological Report of New-York, 1839, p. 96, 97. 
