a ea ae ee Fe et et oe eee ree Ms 
si pei ena 
of Mississippi and Alabama. 37 
resented as dipping southward, conformably with those of the 
Cretaceous. Nevertheless, in the section from Baker’s bluff to 
the lower Salt Works on the Tombigby, he finds the white lime- 
stone (= Jackson and Vicksburg groups) occupying “a trough- 
like depression in the Buhrstone formation.” In co onversations 
with me, a few months prior to his death, he expressed his belief 
that such was the general disposition of the Tertiary strata, and 
that on close examination it would turn out that the strata passed 
over in going southward from the border of the Cretaceous, 
a om again passed over in hori order, still farther south. 
M ort of the existence in Mississippi, of a lignitiferous for- 
santions ‘ili Grand Gulf * neler a of the marine Ter- 
tiary, seemed to confirm this vie 
subsequent examination of the Mississippi Tertiary has 
ne a that in eran a at pens: -_ disposition is such as first 
conceived by Tuomey, and wn on his map; affording a 
strong poate Aeron that the same is sia case in Alabama But 
at the same time I ound, in two different meridians, a similar 
anomalous reappearance of older strata which had sunk out of 
view farther northward. 
ne of these cases is noticed in my Report (p. 128). From 
Jackson to Canton, a distance of twenty-five miles N. andS., the 
same clay marl stratum with Zeuglodon bones and Gryphea con- 
tinues on the surface, ee conformably, as it seems, the lig- 
nitic strata, which appea e bed of Pearl river, just above 
Jackson, overlaid by the soak a8 But thence they sink out of 
view rapidly, a and are followed in regular succession by the Jack- 
son and Vicksburg strata. It will be remarked that here there 
is a singular elbow interrupting the regular E. by 8. course of 
the strike. 
The other case occurs on the Chickasawhay, contrary to the 
statement in my Report (. ¢.), in making which I overlooked 
some ena and notes of 1855, then mislaid. 
I that on the very southern edge of the Vicksburg terri- 
tory in Wayne county, at Dr. EH. A. Miller’s (p. 146), I coilected 
Gastridum vetustum, Moro Petersoni, Laganum Rogersi and other 
Jackson fossils, from a blue sandy marl directly eet ay 
the St. ‘Stephens limestone teeming with Orbitoids. North 
neath those of the Red Bluff group. Within this distance of 
about ten niles, not only have the Jackson strata “dipped up” 
again, but the Red Bluff group, with its concomitant green clays 
and stiff clay marls (nearly a 100 feet in thickness altogether) has 
vanished from between them and the Vicksburg strata proper. 
It might therefore be suspected that the whole — was 
here thinning out, and that we were near the edge of a basin. 
