J. M. Safford on Petroleum in Southern Kentucky. 105 
about seventy miles. The region traversed by this line is a 
plateau, from 800 to 1000 feet above the sea , out of the nearly 
horizontal strata of which the ie streams have eroded yal- 
leys from 300 to 500 feet dee 7 
: i : : 2000 feet. 
311500. 
ito Le ; Go 1000 sé 
pee Io ga ete a ee 500. et 
Cc a™ total 
———— Tide water. 
The following are the formations @ heseogt in the section : 
ss measures, 400 ft., edge of table- 
6 untain Limestone, ‘about 550 ft. thick i in Putnam county ; 
mostly Bideonries 
5. Siliceous group; the “knobstones” of Kentucky. From 
300 to a feet thick, including the Lithostrotion beds as its 
F 
Burksville 
Cumb. riv’r. 
Ohav river 
givet. 
upper par 
: 4. Bla alte rina and Genesee, having a maximum 
thivkerieds of about eet. 
3. Upper Si rari Poni or wholly, from 100 to 150 feet 
thick; mostly a series of limestones, some of which are impure, 
approaching fine sbriditone or shale in character. The ponte 
these strata in the region of Glasgow is mainly inferred fro 
the fact that they are seen in certain sections to the seriedst 
and southwest of this point. They are, however, oe 
unimportant, and thin out southeastward and disappear. 
2. Nashville group, Mr. Dana’s Hudson period ; tc fossilifer- 
ous limestones with some calcareous shales, 500 fee 
1. Trenton limestones, at the base of the section. 
It may be remarke d, in passing, that one of the most striking 
features of this section is the almost entire absence of the Upper 
Silurian and Devonian formations. In the Tennessee and Cum- 
eens 
T have represented i in the section the geological places of what 
we may call typical petroleum wells by the short heavy verti 
nes. We will notice — in ieeonding order 
Ist. In the Mountain Limestone. The heavy line at a in the 
pper part of this formation Sdicates simply the gieecineet lewd 7 
of the “Beaty oil well.” Its foie ee and to’ Soyer een 
positions are very different. The well is located in ee 
on the Big South Fork of Godibeland river, aed near the Ten- 
: eubeye® awkward term subcarboniferous ought to be dropped. Silurian rocks are — 
ae Jour. Se Serres, Vou. XLII, No. 124.—Juxy, 1806, 
2¢ 
