84 BIBLIOGRAPHY AND INDEX OF N. A. GEOLOGY. [bull. 149. 
T. 
057 Taff (Joseph A.) and Brooks (Alfred E.). Buckhaimon folio, West 
Virginia, 
U. S. Geol. Surv., Geol. Atlas of tlio II. S., folio No. 34, 1896. 
Describes the physical features of the Appalachian province, the topog- 
raphy and stratigraphy of the quadrangle, the character and distribu- 
tion of the Devonian and Carboniferous strata, the geologic structure, 
and the occurrence of coal and building stones. Includes topographic, 
geologic, and structure section maps. 
058 Darton (N. H.) and. Piedmont folio, West Virginia, Mary- 
laud. 
See Darton (N. II.) and Taff (J. A.), No. 166. 
051) Tarr (lialph S.). A query concerning- the origin of atolls. 
Nature, vol. liv, p. 101 (I p.), 1896. 
Remarks on the subsidence of Bermuda Islands and discusses the mode 
of formation of atolls. 
000 Taylor (Frank B.). Preliminary notes on studies of the Great 
Lakes made in 1895. 
Am. Geol., vol. xvii, pp. 253-257 (correspondence), 1896. 
Describes the author's observations on the glacial phenomena in 
Michigan and on the north shore of Lake Superior. 
G01 The Algonquin and Nipissing beaches. 
Am. Geol., vol. xvii, pp. 397-400 (correspondence), 1896. 
Discusses the evidences as to the distinctness of these two beaches. 
001* Notes on the Quaternary geology of the Mattawa and Ottawa 
valleys | Ontario]. 
Am. Geol., vol. xviii, pp. 108-120, 1896. 
Describes the occurrence of old shore lines in the region. 
003 Thies (Adolph). Present condition of gold mining in the southern 
Appalachian States. 
Am. Inst. Mg. Engrs., Trans., vol. xxv, pp. 1016-1020, 1896. 
In discussion of paper by H. B. C. Nitze and H. A. J. Wilkens on the 
same subject, remarks on the occurrence of certain clay slates in the 
Haile mine, S. C, previously called talcose slate. 
004 Tight (W. (I.). A pre-Glaeial tributary to Paint Creek and its 
relation to the Beech Hats of Pike County, Ohio. 
Dennison Univ., Sci. Lab., Bull., vol. ix, pp. 25-34, pi. xi, 1895. 
Describes the drainage, discusses its origin, and presents a map of the 
region. 
005 Tilton (J. L.). Geology of Warren Comity [Iowa]. 
Iowa Geol. Surv., vol. v, pp. 303-359, pis. vii-x, figs. 44-51, 185X1. 
Describes the physiography of the county, the lithologic character, 
distribution, and structure of the Glacial and Carboniferous deposits, 
and the occurrence of coal, water supply, building stones, and clays. 
Includes a geologic map of the county. 
