616 NEW YOKK STATE MUSEUM 



zoic age, h) alluvial clays along tlie streams, c) drift clays of nortli- 

 ern and central Indiana. 



Tlie clays of the coal-bearing counties support an active and rising 

 industry, and these are found in the following counties. Fountain, 

 Vermilion, Parke, Vigo, Clay, Owen, Sullivan, Greene, Knox, 

 Daviess, Martin, Dubois, Pike, Gibson, Vanderburg, "Warwick, 

 Spencer and Perry. 



The following represents a typical section from the Indiana Coal 

 Measures. 



Ft In. 



1 Soil aad surface drift clay 9 



2 Blue compact shale 27 



3 Dark bituminous shale 3 2 



4 Coal 2 7 



5 Fire clay 4 4 



6 Drab siliceous shale 18 



7 Sandstone 6 3 



8 Dark bituminous shale 1 



9 Coal . . . : 4 8 



10 Fire clay 3 10 



The fire clays no. 5 and 10 are universally present. ISTo. 2 and 

 6 are considered, taken as a whole, to be the most valuable clay 

 beds in the state. 



Important clay deposits also occur in the counties of Benton, 

 ITewton, Jasper, Starke, Lake, Porter, La Porte and St Joseph. 



Those of Benton co. are of glacial origin, as are those of ISTewton 

 CO.; most of the other counties mentioned contain glacial clays. 

 The Porter co. clays are both glacial and marly. The latter are 

 made into pressed brick by hydraulic brick machines. Aroand 

 South Bend and St Joseph co. are thick deposits of pearl gray,, 

 marly clay of a very fine grain and plastic nature, which burn to a 

 light yellow building brick or a greenish yellow paving brick. 



