METAMORPHIC ROCKS. 481 
bed of magnetic oxide of iron on Mr. Tilly Foster’s farm, two and a half miles southeast of 
Putnam court-house. 
These were the only localities of this kind of limestone seen in the eastern part of Putnam 
county. In the western, are two ranges of the same kind of rock. The following localities 
will illustrate them, viz : 
1. A bed of limestone near Anthony’s Nose point, six miles south of West-Point, which 
is seen again farther north-northeast at the old silver mine ; also at two places on the shore 
between tha(. and Cotton rock ; also at Cotton rock ; near Mr. Arden’s ; two hundred or three 
hundred yards southwest of Phillips’s mill, east of West-Point; half a mile east of the High¬ 
land school; north of Davenport’s tavern on the post road; and at Hustis’s quarry. This is 
the westernmost range, and extends from near Anthony’s Nose point north-northeast, to near 
Davenport’s tavern; and thence through the valley to Hustis’s quarry, about three miles 
south of Fishkill, a distance of about ten or eleven miles. It has also been seen farther to 
the north-northeast on the mountain, 
2, The second range has not been observed in as many places. It has been seen at the 
White mine on the Anthony’s Nose mountain, three miles east of Fort Montgomery; three 
miles east-southeast of West-Point, near the post road; on the road from Coldspring to 
Putnam court-house, near Haight’s tavern, five miles northeast of Coldspring; and about 
half a mile north of Warren’s tavern, in Phillipstown. This range is nearly parallel to the 
other, and nearly similar. 
All these localities are supposed to be in the ranges of limestone which are exposed in these 
various points, and probably in many others. 
1. Hustis’s quarry is in the western limestone bed above mentioned. Some parts of the hill 
are granular limestone, and a part is nearly compact magnesian limestone or miemite. Ser¬ 
pentine is frequently intermixed, forming a verd antique marble, which may perhaps at some 
future time be applied to use. Several fine minerals occur at this locality, which was disco¬ 
vered by Dr. Barratt in 1822, The precious serpentine of this locality is perhaps not sur¬ 
passed in beauty by that of Newburyport or Easton, or even any locality known. It occurs 
crystallized distinctly with various modified forms. White coccolite, white augite, diopside, 
sahlite, phosphate of lime, amianthus, asbestus, pearl spar, pyrites, chromate of iron, mag¬ 
netic oxide of iron, and various other minerals occur at this locality. The mass of limestone 
at this place forms a bed twenty to fifty feet thick, resting against granite or sienite, and 
gneiss containing red felspar and some epidote, on the west, while a stream flows at the base 
of the hill. Prof. Beck, speaking of this locality, says, 
“In a bed of white limestone running*parallel with the granite, and which is of small 
width, and is situated about a quarter of a mile from the New-York road, we have the fol¬ 
lowing minerals, viz : Precious serpentine, of which there are several varieties. The first, 
has a conchoidal fracture, and presents various shades of green and yellow, and is variously 
disseminated through the limestone and other minerals. 2. A slaty variety, having a dark 
green color; it sometimes breaks into rhomboidal prisms, and is very hard and compact. 
Geol. 1st Dist. 61 
