482 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 37. 



2. Clements, J. M. Notes on the microscopic character of certain rocks from north- 



east Alabama. 

 Ala. Geol. Survey, Bull. No. 5, 1896, pp. 133-176. 



Gives a brief description of an olivine-diabase from Gold Hill In Lee County. 



3. Culver, G. E., and Hobbs, W. H. On a new occurrence of olivine-diabase in 



Minnehaha County, South Dakota. 

 Trans. Wise. Acad., vol. 8, 1892, p. 206. 



Describes briefly a somewhat altered olivine-diabase. 



4. Darton, N. H., and Diller, J. S. Occurrence of basalt dikes in the upper Pale- 



ozoic of Appalachian Virginia. 

 Amer. Jour. Sci., vol. 39, 1890, p. 269. 



Mentions the occurrence of an olivine-diabase near Harrisonburg. 



5. DicKERMAN, Q. E., and Wadsworth, M. E. An olivine-bearing diabase from St. 



George, Maine. 

 Boston Soc. Nat. Hist., vol. 23, p. 28. 

 Very brief description. 



6. Diller, J. S. The educational series of rock specimens collected and distributed 



by the United States Geological Survey. 

 U. S. Geol. Survey, Bull. No. 150, 1898, pp. 274-278. 



Includes a description, with chemical analysis, of an olivine-diabase, formerly described as an 

 olivine-gabbro,from Pigeon Point, Cook County, Minnesota. Contains about 10 percent olivine. 



7. Emerson, B. K. The Deerfield dyke and its minerals. 



Amer. Jour. Sci., vol. 24, 1882, pp. 195-202; 270-278; 349-359. 

 Olivine is uniformly present. 



8. Fairbanks, H. W. San Luis Folio, California. 



U. S. Geol. Survey, Geol. Atlas of U. S., folio No. 101, 1904, p. 7. 



Describes diabase exceptionally rich in olivine; this is often the most important constituent. 

 Rock is generally much decomposed. 



9. Hawes, G. W. On a group of dissimilar eruptive rocks in Campton, New Hamp- 



shire. 

 Amer. Jour. Sci., vol. 17, 1879, pp. 147-151. 



Includes brief description of an "olivine-diabase." This rock is now regarded (Rosenbusch) 

 as a camptonite. 



10. Haworth, E. a contribution to the Archaean geology of Missouri. 



Amer. Geol., vol. 1, 1886, pp. 280-363. 



Dikes of olivine-diabase of Archaean age occur in the vicinity of Pilot Knob and Iron Mountain. 

 Rock is very fresh. 



11. Irving, R. D., and Van Hise, C. R. The Penokee Iron-bearing series of Michigan 



and Wisconsin. 

 U. S. Geol. Survey, Mon. 19, 1892, pp. 350-354. 



Olivine is present in comparatively few of the diabases. In one case is very abundant. 



12. Kemp, J. F. Trap dikes near Kennebunkport, Maine. 



Amer. Geol., vol. 5, 1890, p. 129. 

 Describes briefly an olivine-diabase. 



13. Kemp, J. F., and Marsters, V. F. The trap dikes of the Lake Champlain region. 



U. S. Geol. Survey, Bull. No. 107, 1893, pp. 28-29. 



Olivine occurs in a few dikes, and what may be an alteration product of it is present in others. 



14. Laney, F. B. The Gold Hill Mining District of North Carolina. 



Bull. N. C. Geol. Survey (in press). 



Describes olivine-diabase from Rowan County. 



15. Lawson, a. C. Sketch of the geology of the San Francisco peninsula. 



U. S. Geol. Survey, 15th Ann. Rept., 1895, pp. 405-476. 



Describes briefly typical olivine-diabase which probably represents small dikes. 



