The Galena and Maquoketa Series. — Sardeson. 361 
BELOIT FORMATION. 
Blue limestone, D. D. Owen, (1844). Rep. on Exploration of Iowa, 
Wisconsin, and Illinois, p. 19. 
Chazy, Birds-Eye, Black River and Trenton limestones, James Hall, 
(1851). Geology of the Lake Superior Land District, p. 140. 
Trenton limestone, James Hall, (1858). Geology of Iowa, vol. r, p. 54. 
Trenton or Blue limestone, J. D. Whitney, (1858). Geology of Iowa, 
vol. I, p. 341. 
Trenton limestone, H. C. Freeman, (1868). Geological Survey of Il- 
linois, rep. vol. I, p. 276. 
Trenton limestone, C. A. White, (1870). Geology of Iowa, vol. i, p. 174. 
Trenton limestone. T. C. Chamberlin, (1877). Geology of Wisconsin, 
vol. II, p. 290. 
Trenton limestone, R. D. Irving, (1877). Geology of Wisconsin, vol. 
II, p. 588. 
Trenton (Buff and Blue) limestones, Moses Strong, (1877). Geology 
of Wisconsin, vol. ii, p. 680. 
Trenton, or Buff and Blue limestone, Moses Strong, (1883). Geology 
of Wisconsin, vol. iv, p. 88. 
Trenton (Blue and Buff) limestone, T. C. Chamberlin, (1883). Geology 
of Wisconsin, vol. iv, p. 412. 
Trenton, F. W. Sarde.son (1892). Bulletin Minnesota Academy of 
Natural Sciences, vol. iii, p. 325. 
Trenton, C. W. Hall and F. W^ Sardeson, (1892). Bulletin Geologi- 
cal Society of America, vol. in, p. .356. 
Trenton limestone, W J McGee, (1891). Eleventh Annual Report U. 
S. Geological Survey, p. 329. 
Trenton limestone, Ghas. R. Keyes, (1893). Geological Survey of 
Iowa. First Annual Report, p. 24. 
An old subdivision of the "Trenton" or Beloit formation 
is into a lower portion. Bulf limestone and upper or Blue 
limestone. The synonomj'- of the lower divison is as follows-: 
BUFF LIMESTONE. 
Buff-colored limestone, John Locke, (1844). Owen's Report on Iowa, 
Wisconsin, and Illinois, p. 154. 
Calciferous rock, I. .-\. Lajjham, (1851). Geology Lake Superior Land 
District, p. 169. 
Buff limestone, James Hall, (1861). Geology of Wisconsin, vol. i, p. 33. 
Buff limestone, J. D. Whitney, (1861). Geology of Wisconsin, vol. i, 
\). 157. Quarry rock, (of same), plate vi. 
Buff limestone, A. H. Worthen, (1866). Geological Survey of Illinois, 
rep. vol. I, p. 141. 
Buff limestone, J. D. Whitney, (1866). Geological Survey of Illinois, 
rep. vol. I, pi. 4, ante \i. 162; p. 165. 
Buff limestone, James Shaw, (1873). Geological Survey of Illinois, 
rep. vol. V, p. 28, 66, 86, 111, 129. 
Lower Buff Beds, T. C. Chamberlin, (1877). Geology of W^isconsin, 
vol. II, p. 293. 
