552 Annals New York Academy of Sciences 



Lincoln LaPaz of The University of New Mexico and J. D. Bernal of Birkbeck 

 College, University of London, for reading the manuscript. 



References 



1. Urey, H. C. & H. Craig. 1953. Geochim. et Cosmochim. Acta. 4: 36. 



2. WiiK, H. B. 1956. Geochim. et Cosmochim. .\cta. 9: 279. 



3. Berzelius, J. J. 1834. Ann. Phys. Chem. 33: 113. 



4. WoHLER, M. F. 1858. Sitzher. Akad. Wiss. Wien, Malh-naturw. Kl. 33: 205. 



5. Berthelot, M. 1868. Compt. rend. 67: 849. 



6. Berthelot, M. 1869. J. prakt. Chem. 106: 254. 



7. Mueller, G. 1953. Geochim. et Cosmochim. Acta. 4: 1. 



8. WoHLER, M. F. 1859. Sitzlier. Akad. Wiss. Wien, Math-naturw. Kl. 34: 7. 



9. SiSLER, F. 1959. UnpubUshed work. 



10. Calvin, M. 1961. Chem. Eng. News. 39(21): 96. 



11. BoATO, G. 1954. Geochim. et Cosmochim. Acta. 6: 209. 



12. Nagy, B., W. G. Meinschein & D. J. Hennessy. 1961. Ann. N.Y. Acad. Sci. 93: 25. 



13. NoRDENSKioLD, A. E. 1878. Geol. Foren. i Stockholm Forh. 4: 45. 



14. Edwards, G. 1955. Geochim. et Cosmochim. Acta. 8: 285. 



15. Edwards, G. & H. C. Urey. 1955. Geochim. et Cosmochim. Acta. 7: 154. 



16. PiSANi, F. 1864. Compt. rend. 59: 132. 



17. KvASHA, L. G. 1948. Meteoritika Acad. Sci. U.S.S.R. 4: 83. 



18. Stulov, N. N. 1960. Meteoritika Acad. Sci. U.S.S.R. 19: 81. 



19. Mason, B. 1960. Nature. 186: 230. 



20. Sztrokay, K. I., V. Tolnay & M. Foldvary -Vogl. 1961. Acta Geol. Acad. Sci. Hung. 



7: 57. 



21. Mason, B. & H. B. Wiik. 1961. Geochim. et Cosmochim. Acta. 21: 276. 



22. Bernal, J. D. 1961. Nature. 190: 129. 



23. Goldschmidt, V. M. 1954. Geochemistry. O.xford University Press. London. 



24. Shaw, D. M. 1954. Bull. Geol. Soc. Am.' 65: 1151. 



25. Taylor, S. R. & M. Sachs. 1960. Nature. 188: 387. 



26. Ahrens, L. H. & S. R. Taylor. 1960. Spectrochemical Analysis. Ed. 2. Addison- 



Weslev Publishing Co. Reading, Mass. 



27. Buessem, W. R. & B. Nagy. 1954. Proc. 2nd Nat. Conf. on Clays. : 480. 



28. MacEwan, D. M. C. 1951. X-ray Identification and Structure of the Clay Minerals. 



Mineral Soc. Gr. Brit. Monograph. : 86. 



29. Gruner, J. W. 1934. Z. Krist. 88: 412. 



30. Selfridge, G. C. 1937. Am. Mineralogist. 22: 97. 



31. Brindley, G. W. & K. Robinson. 1951. X-ray Identification and Structure of the 



Clay Minerals. Mineral Soc. Gr. Brit. Monograjjh. : 173. 



32. Faust, G. T. Unpublished work. 



33. Mielenz, R. C, N. C. Schieltz & M. E. King. 1954. Proc. 2nd Nat. Conf. on Clays. 



: 285. 



34. Nutting, P. G. 1943. U.S. Geol. Survey. Bull. 197.E: 197. 



35. Nelson, B. C. & R. Roy. 1954. Proc. 2nd Nat. Conf. on Clays. 335. 



36. Byrne, P. J. S. 1954. Proc. 2nd Nat. Conf. on Clays. : 241. 



37. Strese, H. & U. Hofmann. 1941. Z. anorg. u. allgem. Chem. 247: 65. 



38. Epprecht, W. 1941. Schweiz. mineral. Petrog. Mitt. 27: 1. 



39. BowEN, N. L. & 0. F. Tuttle. 1949. Bull. Geol. Soc. Am. 60: 439. 



40. Yoder, H. S. 1952. Am. J. Sci., Bowen. 569. 



41. TuRNOCK, A. C. 1960. Ann. Rept. Director Geophys. Lab. 98. 



42. DuFresne, E. R. & E. Anders. 1961. Geochim. et Cosmochim. Acta. 23: 200. 



43. PouRBAix, M. J. N. 1949. Thermodynamics of Dilute Aqueous Solutions. Edward 



Arnold & Co. London. 



44. Garrels, R. M. 1960. Mineral Equilibria. Harper and Bros. N.Y. 



45. Sagan, C. 1960. Proc. Natl. Acad. Sci., U.S. 46: 393. 



46. Sagan, C. 1960. Proc. Natl. Acad. Sci., U.S. 46: 396. 



