104 PROCEEDINGS OF THE BALTIMORE MEETING 



be indicated by the nature of the sediments as well as by the Tertiary history 

 of the west coast region. 



Presented by title at the request of the author. 



PHOSPHATE ROCK AN ECONOMIC AR2IY 

 BY E. W. STOXE 



{Abstract) 



The United States is the largest producer of phosphate rock in the world. It 

 has also been a heavy exporter, in pre-war years sending upward of a million 

 tons annually to Europe. Second only to the United States in quantity of rock 

 produced is Tunis, a French colony in North Africa. In 1913 the United States 

 produced 3,000,000 tons of phosphate rock, Tunis 2,250,000 tons, and Algeria 

 460,000 tons, or nearly 6,000,000 tons as compared with about 1,000,000 for all 

 other countries. During the war, German-owned phosphate deposits in islands 

 of the Pacific were seized by England and Japan. There are now practically no 

 phosphate rock deposits in the possession of neutral and enemy countries. 



Before the war Germany used annually about 270,000 tons of phosphoric acid 

 in the form of super-phosphates, over 90 of which was imported, and 375,000 

 tons of phosphatic slag, from iron ores used in steel-making. More than 40 per 

 cent of the iron ore used by Germany was imported from Luxemburg, Sweden, 

 and France. The balance was mined in Lorraine, which has now been restored 

 to France. 



Germany, therefore, is now dependent on her enemies for phosphoric acid, 

 which she needs for intensive agriculture. Phosphate rock can therefore be 

 used as a guard to keep the peace and force Germany to pay her bills. 



Eead in abstract from manuscript. 



PREVAILING STRATIGRAPHIC RELATIONSHIPS OF THE BEDDED PHOSPHATE 

 DEPOSITS OF EUROPE, NORTH AFRICA, AND NORTH AMERICA 



• BY A. W. GRABAU 



i Abstract) 



The great majority of the bedded phosphate deposits of all geological hori- 

 zons occur along a plane of disconformity, and as a rule in association with 

 calcareous bedrock, which is often secondarily phosphatized. This points to 

 concentration of phosphatic material originally scattered widely through the 

 missing formation. The paleogeographic significance of such deposits will be 

 discussed and its application in searching for new phosphate horizons will be 

 suggested. 



Presented by title at the request of the author. 



Session of Saturday Afternoon, December 28 



The afternoon was devoted to a joint session with the Association of 

 American Geographers, with its President, N". M. Fenneman, in the chair. 



