137 Geological Bibliography of Virginia 8i 



Fig. 3. Horizontal se(flion extending nearly northwest 30 miles, 

 from Richmond, Virginia, across the coal field. Compiled from 

 the notes of R. C. Taylor and T. G. Clemson. 



Fig. 4. The creek pit. 



Fig- 5- Vertical sedlion of the deep shaft, Chesterfield, Virginia, 

 412 feet. 



Review of Geological Phenomena and the Dedudlions de- 

 rivable therefrom, in Two Hundred and Fifty Miles of 

 Se(ftions in Parts of Virginia and Maryland. Also Notice 

 of Certain Fossil Acotyledonous Plants in the Secondary 

 Strata of Fredericksburg, Virginia. 



Trans. Geol. Soc. Pa., vol. i, pt. i, pp. 314-325, pi. 18, 



1835. 



Fig. I. Lepidodendron. Fig. 2. Lycopodiolithes ? Fig. 3. Sphen- 

 opteris. Fig. 4. Pecopteris ? Fig. 5. Thuytes ? Fig. 6. Sphenopteris ? 



Taylor, S., Discovery in Virginia of the Regular Mineral 

 Salt Formation. 



Amer. Jour. Sci., vol. xli, pp. 214-215, 1840. 



Topley, W., Gold and Silver: Their Geological Distribution 

 and Their Probable Future Produ(5lion. 



Rep't British Assoc. Adv. Sci., 1887, pp. 512-535, plates. 

 For Virginia, see p. 515. 



Topographic Maps. Atlas Sheets. 



U. S. Geol. Surv., 1895. 



The following sheets are completed up to date: Abingdon, Appo- 

 mattox, Bermuda Hundred, Beverly, Bristol, Buckingham, Chris- 

 ftansburg, Cumberland Gap, Dublin, Estillville, Farmville, Frank- 

 lin, Frederick, Fredericksburg, Goochland, Gordonsville, Grundy, 

 Harpers Ferry, Harrisonburg, Hillsville, Jonesville, Lewisburg, 

 Lexington, Luray, Lynchburg, Monterey, Montross, Mount Ver- 

 non, Natural Bridge, Nomini, Norfolk, Oceana, Palmyra, Peters- 

 burg, Piney Point, Pocahontas, Point Lookout, Richmond, Roan- 

 oke, Romney, Spottsylvania, Staunton, Tazewell, Virginia Beach, 

 Warfield, Warrenton, Washington, Whitesburg, Wicomico, Win- 

 chester, Woodstock, Wytheville. 



Townsend, S., Potomac Formation. 



Rep't Health Officer, D. C, for 1884-85, p. 20, 1886. 

 (Not seen). 



Tuomey, M., Discovery of a Chambered Univalve Fossil in 

 the Eocene Tertiary of James River, Virginia. 

 Amer. Jour. Sci., vol. xliii, p. 187, 1842. 



