734 REVIEWS 
Very complete descriptions are given of new types of concretions from 
many localities. Students of concretions will find in this paper some 
original and helpful methods of research. There are also observations 
which may bear on the principles of ore-deposition. Some concretions 
from the deep-sea are found to have the composition of dolomitic lime- 
stone, indicating that dolomite may be formed directly from ocean water. 
The paper closes with a useful discussion of the determination of the 
specific gravity and the modulus of rotundity of concretions. 
C. W. W. 
The Geology of the Granby Area. By E. R. BUCKLEY AND H. A. 
BUEHLER. Missouri Bureau of Geology and Mines, Vol. IV, 
Second Series. Jefferson City, Mo., 1906. 
The authors conclude that faults have had nothing to do with the 
origin of the lead and zinc ores of this district. The so-called fault breccias 
are mostly basal conglomerates of the Pennsylvanian System. Nor were 
the ores derived from the underlying Cambro-Ordovician magnesian lime- 
stone by an artesian circulation, as held by Van Hise, Bain, and others, 
because the water from deep wells in the latter rock contains no zinc or 
lead. The ores were probably derived from overlying Pennsylvanian 
shales and limestones, and concentrated wholly by downward-moving 
waters. 
The report contains an extended discussion of the chemistry of the 
ores and a few pages on methods of mining, concentrating, and melting. 
C. W. W. 
Geological Survey e} New Jersey. Annual Report of the State Geolo- 
gist for the year 1905. By Henry B. KUMMEL, State Geologist. 
Trenton, N. J., 1906. 
The report contains: ‘“‘Changes along the New Jersey Coast,” by 
Lewis M. Haupt; ‘‘A Brief Sketch of Fossil Plants,” and ‘‘The Flora of 
the Cliffwood Clays,” by Edward W. Berry; ‘‘The Chemical Composi- 
tion of the White Crystalline Limestones of Sussex and Warren Counties,” 
by Henry B. Kiimmel, with analyses by R. B. Gage; “‘Lake Passaic Con- 
sidered as a Storage Reservoir,’ by C. C. Vermeule; “‘A Report on the 
Peat Deposits of Northern New Jersey,” by W. E. McCourt and C. W. 
Parmelee; ‘The Mining Industry,” by Henry B. Kimmel. 
