No. 200.] 
135 
Adjacent to these, were blocks of tremolite, of a yellowish grey colour, 
and a species of grey amphibole, nearly like the Edenite of Orange 
county. On the north shore of Oak Neck, masses of granite, contain- 
ing yellow feldspar, were observed. I have never seen granite in place 
similar to this. Red sandstone, and a few boulders of greenstone, also 
occur here. 
A boulder weighing three or four tons, of dark green serpentine, con- 
taining radiated anthrophyllite, was found half a mile S. W. of the head 
of Little Neck Bay. A large boulder of gray tremolite was found on 
the east shore of Cow Bay, in Plan dome. Boulders of steatite and of 
talcose rock, containing anthrophyllite, were seen near the head of Lit- 
tle Neck Bay. Boulders of green, black, and sandy green serpentine, 
like those of Hoboken and York Island, are found at Brooklyn, Wil- 
liamstown and Jamaica. Boulders of a peculiar rock, composed of the 
materials of granite, w^ith the feldspar in a state of decomposition, are 
found at Flushing, Williamstown, Brooklyn, and on Staten Island. 
Boulders of granular white limestone, sometimes containing tremolite, 
occur at Hog Island, Lloyd^s Neck, Oak Neck, Sands' Point, Hewlet's 
Point, Flushing and Williamstown. They are similar to the limestones 
of Westchester county. Near Fort Hamilton, serpentine, greenstone and 
red sandstone, with some granite and gneiss, like those of York Island, 
form the mass of boulders. On Staten Island, serpentine, greenstone, 
granite and gneiss predominate. 
In the interior of Staten Island, a boulder of limestone filled with fos- 
sil shells, and similar to that of Becroft's Mountain, near Hudson, was 
dug from a well at a considerable depth. A boulder of silicious lime- 
stone, like one of the strata of the Helderberg, containing fossils, was 
dug from another well on Staten Island. These boulders were seen by 
Mr. Hazzard, who gave me specimens of these blocks, w^hich he had 
preserved. I found a small boulder of decomposed rock, on the shore 
near the southwest light-house, filled with fossil remains similar to those 
of the middle limestone of Becrpft's Mountain, Columbia county. 
Dr. James Pierce describes petrifactions of marine shells in rocks ex- 
cavated on Staten Island, 20 feet below the surface, and 60 above the 
ocean.* 
These examples are adduced with a view to show the directions of 
transport of rocks and minerals peculiar in character, and they have an 
** Am. Jour. Science, I. p. 145. 
