MOOK, STUDY OF THE MORRISON FORMATION 189 



1911. 2. Stone, R. W. : "Geological relations of ore deposits in the Elkliorn 

 Mountains, Montana." U. S. Geol. Surv., Bull., No. 470, pp. 75-98, 1 pL, 

 1911. [Geolc^ic section and map. Morrison is present at this locality.] 



1911. 3. VON HuENE, F. : "Kurze Mitteilung iiber Perm, Trias, und Jura in 

 New Mexico." Neues Jahrb., Beilage-Bd. xxxii, H. 3, pp. 730-739, 1 pi., 2 

 figs., 1911. [Sections at Morrison, Colorado, and Mesa Prieta.] 



1911. 4. Jamison, 0. E. : "Geology and mineral resources of a portion of 

 Fremont County, Wyoming." Wyoming [Geol. Surv.] ser. B, Bull. No. 2, 

 90 pp., 14 pis., map, 1911. [Section and description of the Morrison.] 



1911. 5. Clakk, W. B., Bibbins, A., and Bekry, B. W. : "The lower Creta- 

 ceous of Maryland." Md. Geol. Surv., vol. Lower Cretaceous, pp. 23-98, 

 10 pis., 1911. [The lower portion of the Potomac is Lower Cretaceous in 

 age. Descriptions and sections of the members of the Potomac forma- 

 tion.] 



1911. 6. Berry, Edward W. : "The lower Cretaceous floras of the world." 

 Md. Geol. Surv., vol. Lower Cretaceous, pp. 99-151, 1 fig., 1911. [Discus- 

 sion of Lower Cretaceous floras and map of their distribution.] 



1911. 7. Berry, Edward W. : "Correlation of the Potomac formation." Md. 

 Geol. Surv., vol. Lower Cretaceous, pp. 153-172, 1911. [Correlation table. 

 I 'atuxent-Arundel equal to the Morrison-Kootenie and in part to the 

 Wealden.] 



1911. 8. Lull, R. S. : "The reptilia of the Arundel formation." Md. Geol. 

 Surv., vol. Lower Cretaceous, pp. 173-187, 1911. [The Arundel fauna is 

 Lower Cretaceous rather than Jurassic in age.] 



1911. 9. Miller, B. L. : "Development of knowledge concerning the physical 

 features of Prince George County." Md. Geol. Surv., vol. Prince George 

 Co., pp. 24-33, 1911. [Note on the Lower Cretaceous, and extensive bibli- 

 ography.] 



1911. 10. Miller, B. L. : "Geology of Prince George County." Md. Geol. 

 Surv., vol. Prince George Co., pp. 83-136, 7 pis., 1911. [Descriptions of the 

 various members of the Potomac formation. They are all considered as 

 Lower Cretaceous in age.] 



1912. 1. Wegemann, C. H. : "The Powder River oil field, Wyoming." U. S. 

 Geol. Surv., Bull., No. 471, pp. 56-75, 1 pL, 1 fig., 1912. [Short description 

 of the Morrison formation.] 



1912. 2. Calvert, W. R. : "The Electric coal field, Park County, Montana." 

 U. S. Geol. Surv., Bull.. No. 471, pp. 406-422, 1 map, 1912. [Description of 

 Ellis, Morrison and Kootenie formations. Detailed section.] 



1912. 3. Lee, W. T. : "The Tijeras coal field, Bernalillo County, New Mex- 

 ico." U. S. Geol. Surv., Bull., No. 471, pp. 574-578, 1 pi., 1912. [Notes the 

 presence of the Morrison formation.] 



1912. 4. Stone, R. W. : "Coal near the Black Hills, Wyoming-South Da- 

 kota." U. S. Geol. Surv., Bull., No. 499, 66 pp., 7 pis., 8 figs., 1912. [Short 

 description of the Morrison formation.] 



1912. 5. Willis, Bailey, and Stose, G. W. : "Index to the stratigraphy of 

 North America," accompanied by a geologic map of North America, com- 

 piled by the United States Geological Survey, in cooperation with the 

 Geological Survey of Canada and the Institute Geologico de Mexico, under 

 the supervision of Bailey Willis and George W. Stose. U. S. Geol. Silrv., 



