Chaney, Ralph W. 1950. A revision of fossil Sequoia and Taxodium 
in western North America based on the recent discovery of Meta- 
sequoia, Trans, Am. Phil. Soc. 40 (3): 171-289. 
Dana, E.S. 1895. Descriptive Mineralogy, Ed. 6, John Wiley, Lon- 
don. 10022 pp. 
Doelter, C. and H. Leitmeier. 1930. Handbuch der Mineralchemie. 
Vol. 4. Dresden and Leipzig. 
Dorf, EK. 1938. Upper Cretaceous floras of the Rocky Mountain Re- 
gion. |. Stratigraphy and paleontology of the Fox Hills and Lower 
Medicine Bow Formations of southern Wyoming and northwestern 
Colorado. Carnegie Instit. Wash. Public. 508: 1-78. 
——, 1942. Upper Cretaceous floras of the Rocky Mountain Region. 
Il. Flora of the Lance Formation at its type locality, Niobrara Co., 
Wyoming. Carnegie Instit. Wash. Public. 508: 79-159. 
———, 1952. Critical analysis of Cretaceous stratigraphy and paleo- 
botany of the Atlantic Coastal Plain. Amer. Assoc. Petrol. Geol. 
Bull. 36: 2161-2184. 
Doyle, James A. 1966. Palynological investigations of Lower Creta- 
ceous sediments of the Atlantic Coastal Plain. Unpub. Biology 
Honors Thesis, Harvard University, Cambridge, Mass. 
Finch, John. 1824. Geological essay on the Tertiary formations in 
America. Am. Jour. Sci. 7: 31-48. 
Fontaine, W.H. 1890. The Potomac or Younger Mesozoic flora, U.S. 
Geol. Surv., Monographs. 15: 1-875. 
Frondell, Judith W. 1967. X-ray diffraction study of some fossil and 
modern resins. Science. 155: 1411-1413. 
Gies, W.J. 1907. Some chemical notes on specimens of American 
amber. Science 25: 462. 
Groot, J.J., J.S. Penny and C.R. Groot. 1961. Plant microfossils 
and age of the Raritan, Tuscaloosa and Magothy formations of the 
eastern United States. Paleontographica, Abt. B, 108: 123-140. 
Harrington, B.J. 1891. On the so-called amber of Cedar Lake, N. 
Saskatchewan, Canada, Am. Jour. Sci. 42 (3): 332-388. 
Helm, O. 1891. Mittheilungen uber Bernstein. XV. Uber den suc- 
cinit und die ihm verwandten fossilen Harze. Schrift. d. Naturf. 
Ges. N.F. 7: 189-203. 
Hintze, C. 1933. Handbuch der Mineralogie I, Abt. 4, H. 2: 721- 
1454, 
Holden, R. 1913. Cretaceous Pityoryla from Cliffwood, N.J. Am. 
Acad. Arts and Sci., Proc. 48: 609-628. 
r 
| 102 | 
