118 
Records of the Geological Surveg of India. 
Table I .— The Savana Boring — coiield. 
[vOL. XIII. 
No, of bed accord¬ 
ing toAIr, Pou- 
lain. 
Arbitrary group¬ 
ing of Mr. King. 
Beds. 
Thickness of beds 
;in meters. 
Progressive thick¬ 
ness in meters. 
Eemaeks. 
21’ 
/ 
Debris of friable “ psaramite ” (? ferru¬ 
ginous grit) tainted with some yellow 
ocliroous clay, mixed with sand, rolled 
pebbles, and some lumps of hard greyish- 
white limestone. 
1-68 
52-68 
At 52-68, 5th gush, 10th 
September 1877. 
22 
Coai'se-grained blackish sand, then some 
debris of ferruginous grit of a deep 
brown colour, less friable than the pre¬ 
ceding, mixed in the mass of coarse¬ 
grained white sand slightly soiled with 
yellow ochreous clay. 
In tills table, tlie strata, their separate thicknesses, the progressive depths, the 
remarks, &c., are collated from Mr. Ponlain’s papers already 
An arbitrary grouping referred to. I have myself taken the liberty of making 
a tentative grouping of the strata into series of permeable 
and impermeable beds, or an arenaceous and arg’illaoeous groujiing, thus . ■ 
Groups op beds. 
Feet. 
Feet. 
Surface soil. 
9-84 
9-84 
A.—Coarse sands. 
14-43 
24-27 
B. —Black clays 
38-04 
62-31 
C.—Coarse sands 
26-24 
88-55 
D.—Black clays 
19-68 
108-23 
E.—Grey sands 
3-28 
111-51 
F.—Black clays 
6-56 
118-07 
G.—Sands. 
3-28 
121-35 
H. -Clays. 
29-52 
150-87 
I.—Gravelly and pebbly beds . 
16-40 
167-27 
J.—Sands with debris of furruginous grits . 
5-51 
172-78 
The arenaceous beds were always loose and incoherent, never consolidated; 
the strata passed through are then clearly alluvial and 
All alluvial strata. recent. The tertiary red sandstones, or “ Cuddalore 
sandstone” of the Survey nomenclature, crojiping up in the low hills to the 
north-west, have not been touched by the boring rod,much less the ci'etaceous 
