OL UBORN K GROUP. 31 
road conies nearest to Okatibee Creek, the aluminou i claj itone of the upper pari of the 
buhrstone disappears beneath the fo iliferous beds of the over!) ing Lisbon beds. 
At Basic station the principal pari of the deep railroad cut i in the aluminous clay stone, 
which occurs in solid ledges 2 to 6 feci thick. When drj it is very light, and from b di itance 
may be taken for white chalk The top of the hill, above the cut, is covered with large 
bowlders of hard, yellow sandstone with Mint like nodule, through it. 
Doctor Hilgard mentions the presence of a yellow aluminous sandstone in louthern 
Neshoba County. The rock, he says, "is very poor In fossils al its northern edge, but 
becomes richer as we advance soul bv ard." 
In the bed of Chunkey Creek, near ( turnkey station, the aluminous clay stone forms high, 
perpendicular walls. Here, as al Basic, joints through the rock are well developed. 
On Thomas Tillman's land, in sec. 9, T. 7 \\, R. I I K., the more siliceou land lone of the 
Tallahatta buhrstone comes to the surface. It is highly colored with ru t\ and pink treal 
of iron oxide. After long exposure it becomes soft and ea il\ broken. It occurs in thin 
layers, 3 to 8 inches thick, interbedded with an indurated clay. The tone here is quarried 
and used locally for foundation pillars, chimney .and hearthstones. It withstands a lace 
amount of heat wit hoi it cracking and is therefore known as the "fire rock." 
Still farther north, between Philadelphia and Edinburg, are numerous outcrops of the ofl 
iron-stained sandstone. A hill on the south side of the road one half mile we t of Worth 
post-office, in sec. 25, T. II X., R. 10 E., Neshoba County, ri es about 7~> feel above the bed 
of the creek. Near its crest is a ledge of sandstone From which large bowlders have broken 
loose and rolled down the hillside, almost completely covering it. 
In western Neshoba and eastern Leake countie the typical "red lands" of the Tallahat ta 
buhrstone are well developed. The decomposition of the and tone rock form a deep red 
clay loan i. It was at first confu ed with the Lafayel te, bul the red clay loam i i alway free 
from pebbles and ferruginous conglomerate. 
[n the bed of Pearl River al Edinburg there i a soft aluminous micaceous and tone con 
taining small angular fragments of flint or chert. The presence of iron oxide in the rock 
gives it a highly mottled appearance. The rock occurs in thin layers 8 to 10 inches thick 
interbedded with micaceous, indurated siliceous clay The pillar For the bridge aero 
Pearl River are said to have come from the hank of the river jusl below the bridge. 
Two and one-half miles northeasl of Edinburg, on Mr. Unsel's land, a very hard quartzo e 
sandstone, much harder than any Found Farther south, occurs on the crests and id< of 
the hills and is used locally for building stone. The line pillar under many of the build- 
ings in Edinburg are said to have come From the Unsel place. 
The hills in northwestern Neshoba, northeastern Leake, and outhea tern Attala coun 
ties, where not covered with Lafayette and detritus, how the pre ence of the Tallahatta 
buhrstone. In some places il is very soft and white; in other if i more flint-like and often 
contains casts of fo il 
Along the eastern edge of the buhrstone area in the vicinity of Alice there i apparently 
more greensand near the base of the formation than higher up. The green and is mixed 
with yellow clays, and he low it is a grayish to dark-brovi n clay containing free and. 
Along the road between Kosciusko and Edinburg, in ec 15 ' T.13N.,R 8W.,isabed 
of marl mixed with greensand underlying a thin stratum of ferruginou and tone. The 
marl bed teems with fossils, bul unfortunately the species collected from thi place were not 
sufficient to determine whether it is ( laiborne or upper Wilcox. 
Five miles north of Kosciusko the main body of the quartzitic and tone occurs. On 
J. C. Bell's land there are two sandstone ledge eparated by 20 to 25 feel of clayej and. 
The upper ledge is 10 to 12 feel thick; the lower one j partly covered bj detritus, bul is 
perhaps 15 feet thick. When freshly dug from the hill ide the andstone i whit< 
grained, andhighly siliceous, with pink streak through it. Some of the ledge farthei i 
the slope have lost then- original 3andy character and are now almo i a pure quartzite. Th< 
best steel hammer is easily battered by striking it againsl tHis rock. 
