REFERENCES 251 



J. F. Kemp : Peridotite dikes in the Portage sandstones near Ithaca, New 

 York. American Journal of Science, November, 1891, pages 410-412. 



P. F. Schneider: Notes on some eruptive dikes near Ithaca, New York. 

 Proceedings of the Onondaga Academy of Sciences, Syracuse, New 

 York, volume 1, 1903, pages 130-136. 



V. H. Barnett : Notice of the discovery of a new dike at Ithaca, New 

 York. American Journal of Science, March, 1905, page 210. 



4. J. F. Kemp and J. G. Ross : A peridotite dike in the Coal Measures of 



southwestern Pennsylvania. Annals of the New York Academy of 

 Sciences, volume 17, 1907, pages 509-518. 



5. J. S. Diller: Peridotites of Elliott County, Kentucky (eastern Kentucky). 



Bulletin of the United States Geological Survey, number 38, 1887. 



Mica-peridotite from Kentucky (Crittenden County, western Kentucky). 

 American Journal of Science, October, 1892, pages 286-289. 



6. J. C. Branner and R. N. Brackett : Peridotite of Pike County, Arkansas. 



American Journal of Science, July, 1889, pages 50-59. 



J. Francis Williams : Igneous rocks of Arkansas, volume 2 of Arkansas 

 Geological Survey, Annual Report for 1890, pages 378-391. In connec- 

 tion with possible diamond mining, many recent short papers have 

 been issued. 



7. Ezequiel Ordonez : Ejemplos probables de Tubos de Erupcion. Memorias 



de la Sociedad Alzate, volume 22, 1904-05, pages 141-150. 

 The later literature of the Tampico oil field has many additional refer- 

 ences. 



8. W. H. Bucher : Cryptovolcanic structure in Ohio of the type of the Stein- 



heim Basin (abstract). Bulletin of the Geological Society of America, 

 volume 32, 1921, page 74. 



9. H. S. Washington: Professional Papers numbers 14 (1903), 28 (1904), 



and 99 (1917), United States Geological Survey. Numbers 14 and 99 

 contain critical discussions of analyses. 



10. R. T. Chamberlin : The gases in rocks. Carnegie Institution, Washing- 



ton, 1908. 



11. W. C. Brogger: Die Mineralien der Syenitpegmatitgiinge der siidnor- 



wegischen Augit-und Nephelin-syenite. Zeitschrift fur Krystallo- 

 graphie, volume 16, 1890. 



12. Joseph Barrell: Relations of subjacent igneous invasion to regional 



metamorphism. American Journal of Science, January, 1921, pages 

 1-19 ; February, pages 174-186 ; March, pages 255-267, especially page 

 261. 



13. J. F. Kemp : Gabbros on the western shore of Lake Champlain. Bulletin 



of the Geological Society of America, volume 5, 1894, pages 213-224, 

 especially pages 218-221. 



