20 geology a;nd MINERAL RESOURCES OF MISSISSIPPI. 
are some well records which show the succession of strata of the upper and middle portions 
of the formation. The well at New Albany doubtless reaches the water-bearing sand near 
the base of the formation. The following is the record of this well, as given by the driller, 
Mr. Baker: 
Record of well at New Albany. 
Feet. 
Surface clay 20 
Sandstone 4 
Clayey sand, water bearing 15 
Blue marl containing shells, with occasional beds of limestone 3 to 4 feet thick 165 
Hard stratum of limestone coming just a hove water a 
White sand, source of water 20 
The following accurate log was kepi of the railroad well at Kent, Pontotoc County, by the 
driller, Albert Goldsburv: 
Record of well at Ecru. 
Feet. 
Red clay and loam 23 
Blue clay 27 
Hard limestone 4 
Reddish, muddy sand 5 
Bed of fossiliferous marl 1 
Sand 3 
Reddish sand containing shells, water bearing 10 
Compact clay, bottom of well. 
One-half mile west of Ecru, on the west bank of the crook, is a hard lodge of limestone, but 
slightly fossiliferous, which is underlain by a softer limestone of a while to gray color. Three 
miles west of town, on Clay Lemon's place, occurs a coarse-grained sandstone which belongs 
to the upper Midway group. 
The classic locality for the Ripley formation is in the " bluffs of Owl Creek, 3 miles north- 
east of the town of Ripley, "a Tippah County. The locality one-half mile south of town, on 
the south side of Ripley Creek, was referred to the Ripley formation by Hilgard and so 
mapped: but a more thorough study of the fossils by Harris and others has placed the per- 
sistent hard limestone teeming with Turritella mortoni in the lowest member of the Mid- 
way, of Tertiary age. This Turritella rock, in the vicinity of Ripley and along many of the 
streams for 3 miles east, overlies the "Owl Creek" marl, which is of undoubted Ripley ago. 
The same order of strata as found oast of Ripley continues northward into Tennessee. At 
Chalybeate Spring, 2\ miles east of Walnut, the upper member of tin 1 Cretaceous, the Owl 
Creek marl, is overlain by the Turritella rock of the Midway. This marl is dark blue and 
micaceous, and contains in places remarkably well-preserved fossils. 
A list of the Ripley Fauna is given below. The collection was made and the fossils deter- 
mined by Dr. T. W. Stanton. In speaking of the Ripley fauna, Stanton adds: 
The Ripley list is based on collections obtained by myself in Tippah County, Miss., in 1889. The most 
thorough collecting was done along the Owl ('reek blufl about 3 miles from Ripley, where the original 
Ripley fauna described by Conrad was obtained. It must be considered the type locahty for the Rip ey 
formation and it yielded fully 90 percent of all the species here listed. The collection contains a consid- 
erable number of undescribed or unidentified species which are not, mentioned in the list. Many syno- 
nyms and doubtful forms are also omit ted. 
a See Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 3, 1858, p. 324. 
