86 
OIL FIELDS OF TEXAS-LOUISIANA COASTAL PLAIN, [bull. 212. 
bilities of finding oil in this region have been exhausted by the rela- 
tively shallow wells thus far drilled. On the other hand, it can not 
be said that the probabilities of finding oil in paying quantities at 
greater depth are sufficient to warrant the great expense of prospect- 
ing. It might, however, be expedient to put down a cooperative test 
well, at some carefulty selected locality, sufficiently deep to exhaust 
C Hi /te brand 
League M Grange League 
Fig. 3.— Map of region surrounding the Spindletop oil pool. 
the possibilities. One such well put down to a depth of 3,000 or 
3,500 feet would be of much more value than any number of wells 
half those depths. 
The well records available in this region show the underlying for- 
mations to be largely heav}^ beds of blue clay and blue and gray sands, 
the latter being generally denominated quicksands by the drillers. 
