APPENDIX 



597 



rated by thin beds of limestone or shale. Usually one and sometimes 

 two of these beds at a given section are workable, and probably some of 

 the others will eventually be mined. The lime phosphate content in 

 the workable beds varies from 65 to 80 per cent, with an average of 72 

 per cent. 



DEVELOPMENT AND PRODUCTION 



The newness of the field, the lack of transportation facilities, and the 

 high freight rates have prevented the development of this phosphate 

 territory to any great extent, although there has been some shipment 

 from Montpelier, Idaho, in the last three years. 



The world's production of phosphate rock, 1905 to 1907, inclusive, 

 is given in the following table : 



WORLD'S PRODUCTION OF PHOSPHATE ROCK, 1905-1907, BY COUNTRIES, IN 



METRIC TONS 



(a) Value not reported. (b) Statistics not yet available. 



AVAILABLE PHOSPHATE DEPOSITS 



The known phosphate deposits of the United States are distributed 

 principally among four localities: (i) along the west coast of Florida, 

 running back 20 to 25 miles inland; (2) along the coast of South Caro- 

 lina, extending 6 to 20 miles inland; (3) in central Tennessee; and 

 (4) in an area comprising southeastern Idaho, southwestern Wyoming, 

 and northeastern Utah. In addition to these areas, some deposits occur 

 in north-central Arkansas, along the Georgia-Florida state line, and in 



