NOTES ON A BORE AT ENFIELD, NEAR ADELAIDE. 
By Watter Howcuiy, F.G.5. 
[Read December 3, 1895. ] 
In 1887 Mr. Rake, of Enfield, put down a bore near his home- 
stead with the hope of finding water suitable for his stock at a 
moderate depth. The bore was continued to a depth of 154 feet, 
but as only a small flow of brackish water was tapped Mr. Rake 
was discouraged and stopped the work. I paid several visits to 
the spot when the works were in progress, and obtained samples 
of the material at various depths. A hope that Mr. Rake would 
pursue his investigations further led me to defer publishing the 
results until now, but as there seems little probability that boring 
operations will be resumed, I have decided to place the par- 
ticulars on record. 
The site of the bore is on a flat-topped ridge which extends 
from North Adelaide to Dry Creek. The ridge has an elevation 
of about 100 feet above the plains of the seaboard on the one 
side, and the valley of the Torrens on the other. It is thus to 
some extent isolated, and occupies a higher elevation than the 
alluvial plains in the vicinity. 
Lithological Features.—lf we except the first four feet, which 
was in the ordinary surface travertine of the neighbourhood, the 
bore can be roughly divided into three portions. 
1. An upper series of variously colored clays—blue, grey, red, 
and mottled with a three feet layer of coarse sand and gravel 
near the base, the whole reaching a depth of 58 feet. 
2. Variously colored sands, mostly very fine, and having a 
thickness of about 32 feet. The first 6 feet of these sand beds 
exhibit a wonderful diversity of bright colors in distinct bands 
—yellow, grey, bright red, pale red, pink, and white follow in 
descending order, the grains of sand for the most part being uni- 
formly about one-hundredth of an inch in diameter. 
Immediately under these highly-colored bands of sand a 
(?) freshwater limestone, two feet thick, was met with resting on a 
bed of clay about six feet thick. Below this clay there is a thick 
bed (18 feet) of yellow and white sand, so extremely fine and 
uniform in size that it nearly all passes through a two-hundredth 
of an inch mesh. 
