1 76 The American Geologist. March, 1905. 
about three-quarters of a cubic foot per second comes to the 
surface at a temperature of 102° Fahr., and charged with 
sul])hur to the saturation point at this temperature. Other 
ingrc(Hents are also found in this water, but in insignificant 
(juantities. The temperature of the water indicates that 
it must come from a depth of 3,000 feet, and this also con- 
veys an idea of the depth of the plutonic formation which, 
of course, lies still deeper. 
The opinion has been very often expressed that this 
water is forced to the surface by artesian pressure, but this 
idea is untenable under the circumstances. It is much 
more likely that it is the pressure exercised by the expan- 
sion of the heated water itself that brings it to the sur- 
face. 
Sprinkled over the summit of this mountain are "small 
deposits of galena but not on a scale to warrant exploita- 
tion. Mining operations are carried on at the northerly 
foot of the mountain, though with but slender results. 
There may be a great body of ore somewhere in the vicinity 
but if so, it has not yet been discovered. 
Monterey, October, 190 Jf. 
CLASSIFICATION OF THE UPPER CRETACEOUS FORMATIONS 
OF NEW JERSEY.* 
Stuart Weller, Chicag'o, 111. 
Three classifications of the Upper Cretaceous formations 
of Xew Jersey have been published in the reports of the geo- 
logical survey of New Jersey ; i. Cook's 1868; 2, Clark's 1892- 
97; 3. Knapp and Kiimmel's 1898-1904. Cook based his- 
classification upon the lithologic characters of the beds, fully 
differentiating the beds of the "marl" series. Clark's classi- 
fication was based in part upon paleontologic data, but his 
diflferentiation of the beds was no advance over that of Cook ; 
he distinguished four major divisions, viz., Matawan, Mon- 
mouth, Rancocas and Manasquan. Knapp and Kiimmel 
have differentiated the old "clay marl" series of Cook into 
five formations, viz., Merchantville, Woodbury, Columbus, 
Marshalltown and Wenonah, based upon lithologic charac- 
ters alone. 
• Abstract of a paper read at the Philadelphia meeting, G. S. A., 
Dec, 1904. 
