62 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY, Lbull.162. 
480 Levy (Louis Edward). See Cabrera (R.), No.117. 
490 Lincoln (D. F.). Report on the structural aud economic geology 
of Seneca County [New York]. 
N. Y. 14th Ann. Rept. State Geolgist, pp. 60-125, pis. 1-19, 12 figs; N. 
Y. State Mus. 48th Ann. Rept., vol. ii, pp. 60-125, pis. 1-19, 12 figs., 1897; 
Review by Stuart Weller, Jour, of Geol., vol. vi, pp. 205-206 (£ p.), 1898. 
Decribes the glacial phenomena of the region, the occurrence and 
character of the Silurian and Devonian strata, and of the economic 
products. Includes a list of papers on the region. 
491 Lindgren (Waldemar). The mining districts of the Idaho Basin 
and the Boise Ridge, Idaho. With a report on the fossil 
plants of the Payette formation by Frank Hall Knowlton. 
U. S. Geol Surv., 18th Ann. Rept., Pt. Ill, pp. 625-736, pis. lxxxvii-cii, 
figs. 55-65, 1898. 
Describes the general geologic history and the occurrence and char- 
acter of the ore deposits and of the Tertiary and Pleistocene strata, and 
includes a report on the fossil plants of the Payette formation. 
492 Boise folio, Idaho. 
U. S. Geol. Surv., Geol. Atlas of the U. S., Folio No. 45, 1898. 
Describes the geologic and physiographic features of the quadrangle, 
the character and occurrence of the Tertiary, Pleistocene, and igneous 
rocks, and the occurrence of gold-bearing gravels and veins, coal, build- 
ing stones, and artesian waters. Includes topographic and geologic 
maps and structure sections. 
493 Orthoclase as gangue mineral in a fissure vein. 
Am. Jour. Sci., 4th ser., vol. v, pp. 418-420, Mg. and Sci. Press, vol. 
lxxvii, p. 32, 1898. 
Describes occurrence of orthoclase in ore deposits and discusses its 
origin. 
494 The canyons of the Salmon and Snake rivers [Idaho]. 
Abstracts, Science, new ser., vol. vii, pp. 71-72; Eng. and Mg. Jour., 
vol.lxv, p. 158 (ip.), 1898. 
Describes the general physiographic features of the region. Com- 
prises summary of paper read before the Geological Society of Wash- 
ington. 
495 The primary gold deposits of the Sierra Nevada. 
Mg. and Sci. Press, vol. lxxvi, pp. 258-259, 1898. 
Describes the occurrence and character of the ore deposits and dis- 
cusses their origin. 
496 See Diller (J. S.), No. 234. 
497 Linton (Edward). On the formation of new ravines. 
Am. Geol., vol. xxi, pp. 329-330, 1898. 
Describes the formation of gullies in the deforested areas of the 
South, with special reference to a particular locality. 
498 Logan (W. N.). The invertebrates of the Benton, Niobrara, and 
Ft. Pierre Cretaceous. 
Kan. Univ. Geol. Surv., vol. iv, pp. 431-583, pis. lxxxvi-cxx, 1898. 
