The American Geologist. 
Vol. XIV, Plate XI. 
MAP OF EUREKA SPRINGS AND VICINITY, ARKANSAS. 
Showing the influence of stratigraphy on the emergence of springs. A, 
Lower Carboniferous chert; B, Shale and sandstone horizon for springs. C,. 
Silurian limestone, chert, etc. Scale '-2 inches to a mile. 
