XV111 TABLE OF CONTENTS. 



THE TERTIARY FORMATIONS— 



V. The Grand Gulf Group; comparatively unimportant in spite of its 

 extent ; poor in useful materials ; plays a small part in the surface 

 conformation ; whole formation marked by the presence of gypsum, 

 common salt and, generally, of magnesian salts, 147, 148 ; localities ; 

 Section of the Bluff at Grand Gulf, Claiborne Co.. 148 ; sandstone, 

 lignite, silicified wood, clays, 149 ; Section at Loftus' Heights, Wilkin- 

 son Co.; Wailes, Prof, on Grand Gulf Group, 150 ; other localities, 

 151 ; peculiar cleavage of sandstones, 152 ; fossil trunks and root* 

 (stumps standing with the roots imbedded in the soil), of dicotyledon- 

 ous plants ; Conifers and Palms ; Section exhibiting the strata contain- 

 ing them, at Mr. Sam. Power's, near Winchester, Wayne Co., 153 ; 

 Section of Bluff at Dwyer's Ferry, Jackson Co.; Newer Tertiary (?) of 

 the Coast ; partly marine, partly fresh- water ; consist of black, fetid, 

 massy clays, containing recent shells and plants ; localities, 154 ; 

 Section at Saucier's, on Wolf River, Harrison Co.; buried Cypress 

 forest; successive generation superimposed upon one another, 155; 

 useful materials of Tertiary ; lignite, its uses, impurities, mode of 

 ascertaining them, 156 ; determination of the amount of ash in lignite 

 from five localities ; presence of iron pyrite injurious, 157 ; mode of 

 distinguishing pyrites from other metals, 158 ; practical value of lig- 

 nite ; increasing necessity for using it as fuel, 159 ; mode of working 

 lignite beds ; localities, 160 ; analysis of Lignite Ash from Hughes' 

 branch; other localities, 161 ; localities continued, 161 to 164; mineral 

 fertilizers of the Tertiary, 164 ; analysis of Shongalo Greensand ; 

 potash and soluble silica chiefly make it valuable, 165 ; calcareous 

 marls of the Tertiary ; of two varieties, viz : white marls, and green- 

 sand marls, 166 ; analysis of the Vicksburg Marl ; experiments with, 

 by Mr. Marshall, 167 ; Section of marl strata at Byram Station 

 (Cook's Ferry); analysis of marl from Byram Station, 168; many 

 joint clay marls ; laminated yellow marl stone of McNutt Hill, 169 ; 

 analysis of marl from Moody's Branch, Jackson ; amonnt of lime in 

 marls of N. Hinds and Madison Co's., 170 ; additional localities of 

 marl, 171 ; analysis of Dr. J. Quin's marl, Rankin Co.; other localities, 

 172 ; localities continued, 173, 174 ; analysis of greensand marl from 

 Garland's Creek ; localities continued, 175 ; additional localities ; blue 

 marls preferable to white ; gypseous marls, 176 ; calcareous marls of 

 the Fresh Water Tertiary, 177 ; analysis of clay marl from Judge 

 Hiram Cassiday's, Franklin Co.; large amount of potash in this marl, 

 178 ; Section of " Barnes' White Bluff," Marion Co., 179 ; analysis 

 of Barnes' marl and remarks regarding it, 180 ; marls sometimes of 

 local value only; Section at Burnett's Bluff, Marion Co.; analysis of 

 green loam this locality, 181 ; gypsum, limestones, 182 ; limestones of 

 Vicksburg Group ; analysis of Vicksburg limestone, 183 ; other locali- 

 ties, 184 ; analysis of limestone from Yost's Rankin county ; best 

 method of preserving lime, 185 ; other localities ; budding stones, 

 186, 187 ; waters of the Tertiary ; of the Lignitic Groups, 187 ; abuse 

 of mineral waters : ingredients common to the waters of the Lignitic, 

 188 ; waters of the S. Lignitic generally considered, 189 ; practicability 

 of Artesian Wells below Vicksburg ; waters of the Calcareous Marine 

 Tertiary, 190; record of the bored well at the State Penitentiary, 191; 

 record of wells bored by Rev. J. R. Lambuth, 192 ; Artesian Wells 

 in E. Mississippi, 193. 

 QUARTERNARY ; divisible into five stages ; Orango Sand previously treated 

 of; Bluff Formation; so named by Prof Swallow; district occupied 

 by, and materials of, 194-5 ; fossils of, collected by Prof. Wailes — stud- 

 ied by Conrad Leidy, 195 ; useful materials and waters of, 196 ; " Yhl- 



