8 BULLETIN OF THE NEW YORK STATE MUSEUM 



Geographical formation Locality 



Cretaceous Westphalia brines, Algiers. 



Jura Rodenburg on the Deister, Bex in Canton of 



Waadt, Switzerland. 

 ' Keuper Lorraine ; Hall, Tyrol ; Hallein and Berchtesgaden 



(near Salzburg). 

 Trias J Muschelkalk Wurtemburg; inThuringia,Ernsthall,Stottenrheim. 

 Buntersandstein Hanover, Schoeningen near Brunswick, Salzder- 

 [ helden, Cheshire, England, /Kansas and Texas. 



Permian Gera, Artern (Thuringia) Stassfurt, Halle, Speren- 



berg ; Segeberg (Holstein) ; Kirghiz steppes on 



the river Heck. 

 Carboniferous Kanawha and New river, West Virginia; Durham, 



and Bristol, England. 

 Devonian Winchell, Michigan. 



Upper Silurian New York, West Virginia, Saginaw, Michigan, 



Goderich, Canada. 



The secondary occurrence of crystallized salt must be dis- 

 tinguished from its primary occurrence in beds. Atmos- 

 pheric waters penetrating into the earth's crust dissolve salt 

 and bring it back to the surface. In this manner salt springs 

 and salt lakes are formed, from which, by evaporation, salt 

 is produced again, and in this connection may be mentioned 

 the occurrence of salt as an efflorescence on the ground in 

 the Kirghiz steppes and in one of the dried up bays of the 

 Caspian sea. Among the well known salt lakes are the 

 Great Salt Lake in Utah, the Dead Sea, that of Eisleben 

 and the Elton Lake near the Volga. 



Whatever be the occurrence of salt springs or natural 

 brines it can not be doubted that their contents of salt are 

 derived from the leaching of salt in the solid state. Wher- 

 ever salt springs abound there is a probability of rock-salt 

 being present in the underlying strata. In addition to the 

 instances mentioned, salt is found dissolved in sea water, 

 and in the polar regions it is found in a granular state on 

 the surface of the ice. 



COMPOSITION OF SEA WATER 



Sea water from different parts of _ the world contains 

 approximately the same substances, as shown by the follow- 

 ing analyses* 



* Wagner ; Chemische Technologie, nth Auflage p. 227. 



