287 



[1915-19] 



TYRRELL, J. B., 8. The Conglomerates of the Witwatersrand. Econ. Geol. 



xii. pp. 717-721. 1917. 

 9. Early Exploration of the Churchill River. Geographical Review, 



1917, pp. 375-381. 1917. A.C. 

 ■ 10. Frozen Muck in the Klondike District, Yukon Territory, Canada. 



Proe. & Trans. Roy. Soc. Canada, ser. 3, xi. sect. iv. pp. 39-46, pis. i-iii. 



1917. And A.C. 



11. Notes on the Placer Mines of Cariboo, British Columbia. Eco)i. 



Geol. xiv. pp. 335-345, fig. [map] & pi. x. 1919. And A.C. 

 12, Was there a " Cordilleran Glacier " in British Columbia ? Journ. 



Geol., Chicago, xxvii. pp. 55-60. 1919. And A.C. 

 . See also Hawobth, E. ; & Parks, W. A., 2. 



UDDEN, J. A. Mechanical Composition of Clastic Sediments. Bull. Geol. 



Soc. Am. xxv. pp. 655-744. 1914. 

 2. Some Deep Borings in Illinois. Bull. III. Geol. Surv. no. 24, pp. 1- 



141, pis. i-iv [topogr. map & vertical sections]. 1914. 

 3. The Age of the Castile Gypsum, and the Rustler Springs Formation. 



Am. Journ. Sci. ser. 4, xl. pp. 151-156, figs. 1915. 

 4. Potash in the Texas Permian. Bull. Univ. Texas, no. 17, pp. 1-59, 



figs, [topogr. map & geol. sections]. 1915. 



5. Oil in an Igneous Rock. Econ. Geol. x. pp. 582-585. 1915. 



■ 6. Notes on Ripple Marks. Journ. Geol., Chicago, xxiv. pp. 123-129, 



figs. 1916. 



UGLOW, W. L. Origin of certain Ore Deposits. Econ. Geol. xi. pp. 87-92. 

 1916. 



2. Ore Genesis and Contact Metamorphism at the Long Lake Zinc Mine, 



Ontario. Ibid. xi. pp. 231-245, fig. [geol. plan & section] & pi. xiii. 

 1916. 



3. Gneissic Galena Ore from the Slocan District, British Columbia. 



Ibid. xii. pp. 643-662, figs. [geol. sections] & pis. xxxvii-xl. 1917. 

 UGOLINI, R. Le condizioni geologiche del giacimento lignitifero di Monte- 



lifre in provincia di Siena. Atti Soc. tosc. Sci. not. Proc. Verb, xxviii. 



pp. 25-34. 1919. 

 ULFFERS, E. Obit.— See Erdmann, E., 3. 



ULLOA, L. La riqueza aurifera del Rio Santiago y de sa zona. Un ensayo 



de historia minera. Bol. Soc. geogr., Lima, xxxiii. pp. 123-151. 1918. 

 ULRICH, E. O. Kinderhookian Age of the Chattanoogan Series. [Abstract.] 



Bull. Geol. Soc. Am. xxvi. pp. 96-99. 1915. 



■ 2. The Chester Controversy. [Abstract.] Ibid, xxvii. p. 157. 1916. 



3. Correlation by Displacements of the Strand-Line and the Function 



and Proper Use of Fossils in Correlation. Ibid, xxvii. pp. 451-490. 



1916. 



4. The Ostracoda as Guide Fossils in the Silurian Deposits of the 



Appalachian Region. [Abstract.] Ibid, xxviii. p. 202. 1917. 



■ —5. Clinton Formations in the Anticosti Section. [Abstract.] Ibid. 



xxix. p. 82. 1918. 



UMPLEBY, J. B. Ore Deposits in the Sawtooth Quadrangle, Blaine and 



Custer Counties, Idaho. Bull. U.S. Geol. Surv. no. 580, pp. 221-249, 



fig. & pis. iii-iv [geol. & topogr. maps]. 1914. 

 2. The Occurrence of Ore on the Limestone Side of Garnet Zones. Hull. 



Geol. Univ. Calif, x. pp. 25-37, figs. [geol. plans & sections]. L916. 

 3. Genesis of the Success Zinc-Lead Deposit, Cceur d'Alene District, 



Idaho. Econ. Geol. xii. pp. 138-153, fig. [geol. plan] & pis. v-vi. 1917. 



[See also Hkrshey, O.H. | 

 UNGEMACH, H. Contribution a la Mineralogie de Madagascar. Bull. Soc. 



franc. Min. xxxix. pp. 5 38, figs. 1916. 

 2. Notes cristallographiques sur la pyrito de different s giseinents 



francais. Ibid. pp. 213-226, figs. 1916. 

 3. . Sur la pyrite du comte de Gilpin (Colorado). Ibid. pp. 226 -230, 



figs. 1916. 



4. Sur tin remarquable gisement de ehaleostibite an Maroc. C. R. Acad. 



Sci., J'nri.s, elxix. pp. 918-919. I'M!). 



UNITED STATES. Geological Sukvkv- Thirty -fifth Annual Reporl of 

 the Director [G. O. Smith] of the United Stales Geological Survey for 

 the Fiscal Year ended June 30, 1914. Pp. 1-163, pis. i-ii. 8vo. Wash- 

 ington, 1914; Thirty-sixth Report [1916]. Pp. 1-186, pis. i ii. 8vo. 

 Washington. 1915. 



