XVI TABLE OF CONTENTS. 



CRETACEOUS : extent of territory occupied by, dip of strata Dr. Spillman's, 

 estimate, 60; three stages of — properly given: Eutaw Group, 1 ; Tom- 

 bigbee Sand Group, 2 ; Rotten Limestone Group, 3 ; Ripley Group, 4 ; 

 general characteristics and fossils of each, 61, 62. 

 Eutaw Group : specially considered, means of distinguishing it from over- 

 lying Orange Sand, its clays characteristically developed in Tishomingo 

 county, diagram illustrating its stratification, 63 ; localities of, fossil 

 trees in, 64 ; fossil resin in, 65 ; additional localities, 66 ; Section 

 showing relation of Rotten Limestone and Eutaw, lignite and pebbles 

 in, Tuomey quoted 67 ; Section of Cretaceous in Lowndes county, 

 great number of shark's teeth, 68. 

 Tombigdee Sand Group specially considered, 68 ; micaceous sand preva- 

 lent material, localities of, 69 ; Section M. & C. R. R., additional local- 

 ities and fossils, 70 ; Section on M. & C. R. R., additional localities and 

 fossils, 71 ; Section on Big Brown's Creek, Tishomingo county, and 

 description of the strata, 72 ; Section on the Tombigbee, in Monroe 

 Co., and description of strata, 73 ; Section on the same, in Lowndes 

 Co.; Dr. Spillman's collection of fossils ; E. Q. Thornton, Esq., quoted ; 

 Prof. Tuomey quoted, 74 ; fossils of this group compared with similar 

 strata in Alabam, 75. 

 Rotten Limestone Group ; general character, material of, dip of. 

 paleontological distinction from the Tombigbee Sand Group, 76 ; local- 

 ities and fossils, 77 ; additional localities, depth of wells, 78, 79 ; locali- 

 ties continued, 80 ; absence of springs and sipe wells, fossils of this 

 group, 81, 82. 

 Ripley Group : surface of the territory hilly ; two materials compose, 

 essentially, its strata — crystalline limestone and bluish micaceous 

 marls, p. 83 ; springs of, peculiar vegetation of, history of the discovery 

 and exploration of, study and determination of the fossils, Hilgard, 

 Conrad, Harper, Spillman, 84 ; localities of, 85 ; Section of strata in 

 Wilhite's Well, and at Kindrick's Mill, Tippah, 86 ; Section at Rip- 

 ley, 87 ; Section at Owl Creek Bluff, 88 ; Section of an isolated Cre- 

 taceous hill, Tippah Co., 89 ; localities, limestone ledges, caves, 90 ; 

 localities continued, 91 ; fossils of the group, Moore, Prof. W. D. 92 : 

 catalogue of, 92, 93, 94 ; catalogue of species common to Upper and 

 Lower Cretaceous, by Conrad and Gabb ; useful materials of the Cre- 

 taceous, 95 ; Marls wanting in Eutaw Group ; micaceous sands of 

 Tombigbee Group, good fertilizers, 95 ; analysis of sand from Waverly 

 Bluff, marls of the Rotten Limestone Group ; analysis of Houston 

 marl ; iron pyrites in this marl makes it necessary to be cautious in its 

 use ; the rotten limestone itself a marl ; a calcareous stimulant manure. 

 Marls of the Ripley Group, 97 ; their distinguishing feature green sand; 

 these marls generally underlie the limestone in the region of their 

 occurrence ; analysis of Wilhite's marl ; localities of this marl, 98 : 

 analysis of marl from 0. Davis' Well near Ripley ; superior to Wil- 

 hite's, 99 ; gray calcareous sand ; gray calcareous clay ; limestone not 

 found in Eutaw, or Tombigbee Sand Group ; hardest varieties usually 

 purest ; other modes of practically determining its purity ; foreign 

 material (generally clayey) in the Rotten Limestone impairs its value 

 for making quicklime ; localities of the purest, 100 ; analysis of Oka- 

 lona Rotten Limestone, 101 ; limestone in the Ripley Group abundant ; 

 foreign material generally sand ; purer varieties usually along the 

 western edge of the territory, 102 ; localities, analysis of Daggett's 

 Limestone, 103 ; building stones ; none in the Eutaw Group ; Rotten 

 Limestone too soft ; limestones of Ripley Group better ; waters of the 

 Cretaceous Formation ; abundant in the Eutaw and Tombigbee Sand 

 Group, 104 ; little in the Rotten Limestone ; abundant in the Ripley 

 Group, 105, 106. 



