ANALYSES OF SANDSTONES, CHERTS, AND SINTERS. 
SANDSTONES FROM EASTERN STATES. 
A. Calciferous sandstone, New Sweden, Maine. Described by H. E. Gregory in 
Bull. 165. Analysis by W. F. Hillebrand, record No. 1795. Contains quartz, calcite, 
feldspar, magnetite, muscovite, and siderite. 
B. Brown sandstone, Hummelstown, Pennsylvania. Analysis by E. A. Schneider, 
record No. 1280. Described by Diller in Bull. 150, p. 77. P. R. C. 14. 
C. Triassic sandstone from the Jaittelle quarry, near Hancock, Maryland. Hard, 
compact, brown. Analysis by F. W, Clarke, record No. 613. 
nso ab esi. AC) een areal aaa see BONN eos eH Heer aie SAUER SS Tee el|t ce Gaalees omnes 88. 68 
SANDSTONES FROM MICHIGAN, WISCONSIN, AND IOWA. 
A. Yellow sandstone, Stony Point, Michigan. Analysis by F. W. Clarke, record 
No. 213. 
B. Potsdam sandstone, Ablemans, Sauk County, Wisconsin. Described by Diller 
in Bull. 150, p. 80. Analysis by Schneider, record No, 1280. P. R.C. 15. 
C. From Boscobel, Wisconsin. 
D. From Beetown, Wisconsin. Analysis C, D, by G. Steiger, record No. 2227. 
E. From Springdale Station, Sioux City, Iowa. Analysis by Steiger, No. 2295. 
Rocks C, D, E are St. Peter sandstone, described as ‘‘glass sands” by E. F. 
Burchard in Bull. 285, p. 459, and Bull. 315, p. 377. Partial analyses only. 
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