ABSTRACTS 



Authors of scientific papers are requested to see that abstracts, preferably 

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 forward such material to this journal and abstracts of official publications should 

 be transmitted through the representative of the bureau in which they originate. 

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 this issue. 



GEOLOGY. — The Gold Log mine, Talladega County, Alabama. E. S. 

 Bastin. U. S. Geological Survey Bulletin 640-1. Pp. 159-161. 

 1916. 



The geologic features of a gold mine that has been worked inter- 

 mittently for seventy years near Talladega, Alabama, are described. 

 The country rock is Talladega slate, probably of Lower Cambrian age. 

 The ore consists of (1) irregularly interlocking white to light-gray quartz, 

 white to pale-pink calcite, and very minor amounts of sulphides and 

 free gold, and (2) schist partly replaced by some or all of these minerals. 

 Chalcopyrite is the principal sulphide. Free gold occurs locally in 

 irregular masses in the quartz. 



The value of the gold and silver recovered is reported to average 

 about $4 to the ton of ore treated. R. W. S. 



GEOLOGY. — Ozokerite in central Utah. Heath M. Robinson. 

 U. S. Geological Survey Bulletin 641-A. Pp. 1-16, with 1 plate. 

 1916. 



The American needs for ozokerite (a substance commonly known as 

 mineral wax) have been largely met in the past by imports from the 

 Galician mines in Austria, but interest in the domestic supply has 

 recently been stimulated. The largest district in the United States in 

 which it has been mined and prospected is an area in central Utah a 

 little more than 12 miles long and from 1 to 4 miles wide between 

 Gilluly and Colton. 



The rocks of this field have a total thickness of about 4000 feet and 

 were deposited as nonmarine sediments in early Tertiary (Eocene) 

 time. The lower 1000 feet of the beds exposed are known to contain 

 ozokerite, and the remaining 3000 feet contain bituminous or oil shale 



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