96 Bulletin 7 15a 



' ' The only places where I have seen the Eocene and Older 

 Pliocene in contacft, are in the bank of the James River in Vir- 

 ginia, about two miles below City Point; and again a few miles 

 further down the river at Coggin Point, the plantation of my friend, 

 Edmund Ruffin, Esqr." 



Coryell, M., Diatomaceous Sands of Richmond, Virginia. 

 The Virginias, vol. ii, pp. 6-7, section, 1880. 



Cowlan, Geo. B., The Extent and Value of East Tennessee's 

 Minerals. 



Engr. and Min. Jour., vol. xlv, pp. 19-21, 1888. 

 Virginia referred to. 



Credner, H., Zeitschr. fiir die Gesammten Naturwissen- 

 schaften, vol. xxxiv, p. 24, 1870. (Not seen). 



Pyrite in Virginia, Tennessee, and Georgia. 



B. & H. Zeitschr., 1871, p. 370. (Not seen). 



Currey, R. O., The Copper and Iron Region of the Floyd- 

 Carroll-Grayson Plateau of the Blue Ridge in Virginia, 

 etc. 



The Virginias, vol. i, pp. 62-64, 69-71, 74-77, 80-81, 95, 

 1880. 



D 



Davis, Floyd, The Pocahontas Coal Mines. 



The Virginias, vol. vi, pp. 170-171, 1885. 



Day, D. T., Mineral Industries. 



nth Census U. S., 1890. xvi & 858 pp. 

 Barytes, by E. W. Parker, pp. 745-747. 



Virginia, see pp. 745, 746. 

 Coal, by J. H. Jones, pp. 345-422. 



Virginia referred to throughout. 

 Gold and Silver, by R. P. Rothwell, pp. 33-151. 



Virginia, see pp. 59-64* 

 Stone, by W. C. Day, pp. 595-666. 



Virginia: granite, pp. 603, 608; limestone, pp. 632, 633, 636, 637, 

 638; sandstone, p. 647; slate, p. 662; marble, p. 619. 

 Gypsum, by E. W. Parker, pp. 699-704. 



Virginia, see pp. 699, 701. 

 Manganese, by J. D. Weeks, pp. 287-329. 



Virginia, see pp. 288, 311, 317. 

 Mineral Waters, by A. C. Peale, pp. 779-787. 



Virginia referred to throughout. 



