CARBONATE ROCKS. 195 
MISSISSIPPI. 
Limestones received from E. C. Eckel. Partial analyses by H. C. McNeil, record 
No. 2181. CO, calculated to satisfy bases. 
A. From Macon. 
B. From Scooba. 
C. From Border Creek. 
D. From Wahulak Creek. 
E. From Prairie Rock. 
F. Selma chalk, from north of Macon. 
G. From Lime Creek. 
A B Cc w. E F G 
BIO a a ciaiestichs Sacaeeiele he remiatesing Me mcacraesiegce 9.09 | 16.48} 10.60} 20.00 1.13] 8.52 8.06 
Al203+Fe203.. 7.47 | 6.97] 5.90] 8.92 68 6. 60 5.94 
MEOY srcaiecereects none 33 | trace | trace | trace | none none 
CaOsiescisseans 45.38 | 41.64 | 46.21 | 38.61 | 54.55] 47.00 47. 41 
gO): csaias sesini050 1.08 67 82 1.03 40 1.00 1.32 
OS ogaceg ae aiguenananpanceawcumaaqinememepeaye 35.61 | 33.04 | 36.26 | 30.30] 42.81 | 36.88] 37.20 
98.63 | 99.13 | 99.79 | 98.86) 99.57 | 100.00 | 99.93 
TYSON ius corn ncosaekentuieaccsacewereuaas 14.59 | 20.96 | 14.21] 25.79 1.36 | 10.00 10. 28 
TEXAS. 
Supposed cement rock, Uvalde quadrangle. Collected by T. Wayland Vaughan. 
Analysis by W. F. Hillebrand, record No. 1759. 
A, the rock; B, the part insoluble in dilute nitric acid. 
a By difference. 
OHIO. 
A, B, C, D. Trenton limestone from New Vienna. 
E. Trenton limestone, Arcadia, Hancock County. 
F. Air-line Junction, Toledo. This sample contains a great deal of ferrous car- 
bonate. ’ 
G. Gas rock, St. Henry’s well, Mercer County. 
H. Oil rock, Lima. 
All Trenton. Partial analyses by F. W. Clarke and R. B. Riggs, record Nos. 729, 
730, 732. Iron and alumina are present in soluble form. 
