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rence, the history of development and values being treated for each 

 type of deposit. In most cases no attempt is made to inquire into the 

 genesis of the deposits. 



In a work of this nature whose value is chiefly statistical one would 

 expect a general summary and table showing the relative importance and 

 value of the various deposits, but none is found in this volume. Of the 

 ores of the state, those of iron are by far the most important. In 1907 

 they were mined to the value of over $800,000. E. R. L. 



The Mining Industry in North Carolina during iQoy with Special 

 Report on the Mineral Waters. By Joseph Hyde Pratt. 

 North Carolina Geological and Economic Survey, Economic 

 Paper No. 15. Pp. 176. 

 The most important part of this paper is a report on the Gold Hill 

 Copper District by F. B. Laney (pp. 20-55). This district is located in 

 the south-central part of the state just west of the Yadkin River. The 

 rocks are slates and igneous rocks of various kinds, and of different 

 periods of intrusion. The ores are (1) auriferous pyrite and chal- 

 copyrite in a quartz gangue and (2) slightly auriferous bornite and 

 chalcocite in a quartz epidote gangue. No attempt is made to corre- 

 late the period or periods of ore deposition with a period of igneous 

 activity or to determine the age of the ores. 



The remainder of the paper is chiefly statistical. 



E. R. L. 



Paleontology of the Coalinga District, Fresno and Kings Counties, 

 California. By Ralph Arnold (U.S. Geol. Surv. Bull. 396). 

 Pp. 101 and plates 30. 

 The district forms a strip roughly fifty miles long by fifteen miles 

 wide along the border between the Coast ranges and the San Joaquin 

 valley. The eastern slope of the mountains is formed by a great thick- 

 ness of strata dipping toward the valley, successively younger formations 

 being exposed to the east. The rocks of the district range in age from 

 the Franciscan formation, which is probably Jurassic, to rocks of 

 recent age, with an unconformity at the base of almost every formation. 

 A description of the formations with faunal lists is followed by descrip- 

 tion of forms from the Tejon formation (Eocene), the Vaqueros, the 

 Jacalitos, and the Etchegoin formations (Miocene), and the Tulare 

 formation (Freshwater Pliocene). 



E. R. L. 



