GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
GROUND WATER IN NORTH-CENTRAL TENNESSEE
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STRATIGRAPHY 6f<br />
Diameter of well, at top, 10 inches; at bottom, 8 inches; depth in October, 1927,<br />
1,930 feet, with drilling in progress. Log based upon examination of cuttings<br />
sampled by Franklin Oil & Fuel Co. at each multiple of 10 feet from a depth of<br />
40 to 1,930 feet. Casing head about 15 feet below top of Murfreesboro limestone.<br />
ST. PETER (?) SANDSTONE<br />
Several deep wells in southern Kentucky reach, a somewhat variable<br />
sandstone or sandy limestone stratum which has been correlated by<br />
Munn 25 and by Shaw and Mather 26 with the St. Peter sandstone of<br />
the upper Mississippi Valley. This stratum is in the lower part of<br />
the Ordovician system of that area and is from 1,470 to 1,600 feet<br />
below the Chattanooga shale. Butts,27 on the other hand, presents<br />
data which suggest that the supposed St. Peter sandstone penetrated<br />
by wells in western Kentucky and southern Indiana is not a single<br />
stratum but rather comprises several sandy layers at different hori<br />
zons in a mass of sandy limestone and dolomite. No one of these<br />
layers can be correlated certainly with the typical St. Peter sandstone.<br />
In north-central Tennessee sandy strata are penetrated by several<br />
deep wells in the vicinity of Nashville and by the Franklin Oil & Fuel<br />
Go's, test well near Murfreesboro. The character and stratigraphic<br />
relations of the strata at Nashville are shown by the preceding log of<br />
the test well on the Arthur Stevens property at Bordeaux, in which<br />
beds of sandstone, sandy limestone, and calcareous sandstone were<br />
penetrated from 1,043 to 1,210 feet below the surface. The top of<br />
this group of beds is about 1,500 feet stratigraphically below the<br />
Chattanooga shale. In the well near Murfreesboro the sandy stratum<br />
is only about 10 feet thick, and its top is about 610 feet below the<br />
surface, or 1,400 feet below the Chattanooga shale. The sandy beds<br />
penetrated by the wells near Nashville seem to constitute a single<br />
stratum at approximately the same geologic horizon as the supposed<br />
St. Peter sandstone of Wayne County, Ky. The sandy bed in the<br />
well near Murfreesboro is also at about the same horizon, though<br />
it can not be inferred that this bed is a southward extension of the<br />
stratum penetrated at Nashville. If these sandy beds penetrated in<br />
Kentucky, at Nashville, and near Murfreesboro constitute a single<br />
stratum, it thins notably toward the southeast.<br />
The St. Peter sandstone of the upper Mississippi Valley is a persist<br />
ent water-bearing stratum, so that, if present in central Tennessee<br />
and if its water-bearing properties remain unchanged, it constitutes<br />
a potential deep source of water in this region. Its promise as a<br />
source of ground water is discussed in the descriptions of Davidson<br />
and Rutherford Counties (pp. 134, 179).<br />
15 Munn, M. J., Reconnaissance of oil and gas fields in Wayne and McCreary counties, Ky.: 17. S. Geol.,<br />
Survey Bull. 679, p. 17,1914.<br />
» Shaw, E. W., and Mather, K. F., The oil fields of Alien County, Ky.: U. S. Geol. Survey Bull. 688,<br />
p. 39,1919.<br />
" Butts, Charles, Geology and mineral resources of Jefferson County, Ky.: Kentucky Geol. Survey, ser.<br />
4, vol. 3, pt. 2, pp. 33-36, 1916.