04 REVIEWS 
Part III discusses the mineral resources, the chief of which are 
oil and gas. Their development is of recent date. But few wells have 
been driven into the Chemung, and none below it, the present, known 
producing horizons being limited to the Pennsylvanian and Mississip- 
pian. Coal-mining operations, while on a large scale, are insignificant 
when compared to those of other counties of the state. The author esti- 
mates that the total available tonnage that may eventually be recovered 
is about 4,440,000,000. While there is not a single brick or pottery 
plant utilizing clays within the counties, there is an almost inexhaustible 
supply of raw materials as well as cheap fuel. Sandstone for road maca- 
dam and building purposes is abundant. In Clay County about half 
of the land is unfit for agricultural purposes, and it is suggested that 
this land be reforested. 
Part IV consists of several paleontological contributions. W. A. 
Pierce presents some notes on the fossils of the Winefrede limestone and 
Uffington shale in which he notes the absence of a marine fauna. Pro- 
fessor E. C. Case describes the leg bone of a pareiasaurus-like reptile 
found in the Conemaugh series. I. C. White gives a few notes on the 
Conemaugh and Permian of the region, and comes to the conclusion 
that “not only the reptilian life, but also the plant and insect life of 
the Conemaugh series supports the conclusion that the beginning of 
red sediments in the Conemaugh marks the dawn of Permian time 
while there is nothing in the marine life of the epoch to contradict the 
same when properly interpreted. 
Attached to the report is an appendix giving the elevations above 
mean tide for the area. 
A. C. McF. 
The Mackenzie River Basin. By CHARLES CAMSELL and WYATT 
Matcoitm. Canadian Geological Survey, Memoir 108, 1919. 
Pp: 154, pls) 24, fer and map: 
This is a compilation of what is known concerning the geology 
of the Mackenzie River basin, which is about 1,350 miles long and 
too miles wide at the mouth of the river and 900 miles wide near the 
center, with a total area of about 682,000 square miles. 
Parts of three chief physiographic provinces are included in this 
area and each one runs almost the whole length of the basin. They 
are the Laurentian Plateau on the east, the Great Central Plain of 
North America in the center, and the Cordilleran region on the west. 
