Rcvieiu of Recent Geological Literature. 127 
Prof. Rollin D. Salisbury and Mr. George N. Knapp present their 
Report of Progress on the Surface Geology in 23 pages, with seven 
plates. It is found that the Pensauken formation, which McGee and 
Salisbury have pronounced to be the northward continuation of the 
Lafayette formation in the more southern states of the Atlantic coastal 
plain and Gulf region, when traced into the northeastern part of Mid- 
dlesex county, adjoining the glacial drift, becomes in many places un- 
stratified and incloses glacially striated stones, being almost like till. 
It was formed contemporaneously with an early extension, perhaps the 
maximum, of the North American ice-sheet. 
Because of this relationship, it seems to me worthy of inquiry 
whether the correlation with the southern coastal plain formations studied 
by McGee, Darton, Clark, and others, may be better given as follows: 
I. The clay and sand beds of the lower part of the Beacon Hill scries. 
probably marine Miocene; 2. The upper Beacon Hill gravel, eciuivalent 
with the Lafayette formation; 3. The great erosion interval between 
the time of the Beacon Hill gravel and the Pensauken epoch, equiva- 
lent with the Ozarkian epoch of Hershey, completing the Lafayette 
])eriod; 4, etc. The Pensauken, Jamesburg. and Trenton formations, 
with the Philadelphia brick clay, all of Glacial age, the first belonging 
to a time of high continental elevation, and the others to the Late 
Glacial or Champlain epoch of continental depression, together repre- 
senting the Columbia series in its high level and low level phases. This 
view, with reference of all the Yellow Gravel series in New Jersey to 
tiuvial deposition, not in the sea, was suggested by the present reviewer 
in the American Geologist for IMarch, 1895 (vol. xv, p. 204). 
Dr. Henry B. Kiimmel, in Part II. (pages 25-88, with plate viii). 
reports the progress of his field work and studies of the Newark system. 
The sedimentary rocks of this system are divided, in ascending order, 
into the Stockton, Lockatong, and Brunswick series. Exclusive of the 
intruded sheets and overflows of trap, the thickness of these three divis- 
ions is estimated to be, respectively, 4,700, 3,600, and 12,000 feet, giving 
a total of 20,300 feet. 
Part III is Prof. J. E. Wolff's Report on Archean Geology (pages 
89-94, with plate ix), dealing with the eruptive rocks of Sussex county. 
Part IV, by Lewis Woolman, includes reports on artesian wells 
(pages 97-200), and notes on the stratigraphy and fossils of the Fish 
House black clay and associated gravels, near Camden and Philadelphia, 
which are referred to the Pensauken series. The fossils comprise 
Unio and Anodonta species, Eqitiis complicatiis Leidy, flattened 
tree and other plant stems, and peat. Mr. Woolman also notes the 
occurrence of dinosaur and molluscan fossils in Cretaceous clay marls, 
and of Fiilgur and Voivs casts in Beacon Hill sands near Millvillo, 
about 40 miles south of Camden. 
The remaining parts of this volume treat of the Hood ol February 
r)th, 1896, in northern New Jersey, by C. C. Vermeule; of drainage of 
the Newark and Hackensack tide-marshes, also by Mr. Vermeule, with 
a large folded map; of the iron-mining industry, by George E. Jenkins; 
