Pseudohtorphs from the Taconic Region. — Hohl)i<. 45 
masses forming ridges Avhicli have been described as ca- 
naanite. * 
Tremolite from Canaan is mentioned in Cleaveland's Mineralogy 
and is common in mineral collections. The best crystals come 
from the Maltby quarry about three-fourths of a mile north of Falls 
Village, where they are semi-translucent, attaining to a breadth of 
a quarter of an inch or more. They are usually white but some- 
times light green in color. There is also a fine radial variety from 
this locality having a silky lustre. 
While making a reconnaissance of Canaan mountain in the 
summer of 1889, I came upon huge glacial boulders of impure 
limestone on the north flank of the mountain some distance above 
the exposures of limestone, and resting on a layer of till. The 
locality is on the coaling road about one mile south of and 330 
feet vertically above the first road corner east of the junction of 
the Blackberry and Whiting rivers. These boulders were filled 
with nodules of coarse tremolite. Most of the nodules could be 
seen to have the form of pyroxene crystals, and several were dug 
oiit on which all the planes of the prismatic zone were well de- 
veloped with the orthopinacoidal habit. In some cases the crys- 
tals show terminations by a pyramid which gives an angle of 
about 110° to the front, probably — 2P. They attain to a length 
of two to three inches and a breadth of nearly two inches. Very 
little of the pyroxene material remains owing to a paramorphic 
change to tremolite. t The tremolite needles situated near the 
surface of the crystal usually lie with their axes in the bounding 
planes or nearly so, and there is also a tendency on prismatic 
planes to parallel orientation with the pyroxene. The arrange- 
ment of the tremolite is usually quite irregular within the crystal. 
A portion of one of these pseudomorphs has been analyzed by 
Dr. W. F. Hillebrand in the laboratory of the U. S. Geological 
Surve}' with the results given below under I. 
*This was first thought by Hitchcock to be scapolite (Geol. Rep. Mass 
2d ed., 1835, p. 315), afterwards nephrite or saussurite (Rep, Geol. Mass, 
1841, p. 569). On the basis of a faultj^ analysis b}' S. L. Daua, it was 
thought to be a new mineral and named Canaanite (Alger's Phillip's 
Mineralogy, 1844, p. 89). Shepard at first thouglit it nephrite or saus- 
surite (Geol. Mass., 1841, p. 569), l)ut afterwards recognized it as pyrox- 
ene (Rep. Geol. Survey, Conn., 1837, p. 134). In Dana's iSystem of Min- 
eralogy (5th ed., 1868, p. 803) an analysis l)y Burton is printed showing 
the mineral to be pyroxene. 
t(These specimens are No. 3186 of the U. S. Geological Survey collec- 
tion from the vicinity.) 
