Depth
Character of Layers
Hard
0-1000!
1%
1000-2000!
2000-+3000'
3000-4000!
Average
Firm
O%
Soft
Cavity
99%
0%
8
18
0
17
38
4
67
ha
96
8
3
0
7
15
75
3
.
A complete log of the drill nole will be available at the completion of tne project.
Arrengements have now been completed to drill a second hole
(Station 1131) on Parry Island.
Experience with drilling the first
hole will reduce difficulties on the second and it is expected that
samples of tne basement rock will be obtained.
Furthermore it is
expected that gaps in the drill record for the first hole can be
partially filled from the second.
approximately 2,000 ft deep.
As of 30 June this second hole was
The two drill holes willprovide good
control for interpreting the results of tne seismic refraction survey
(Project 11.4) to be run by the Scripps Institution this fall.
The possible tnird drilling locetion (Station 1132) on the coral
head west of Runit has been abandoned because of the high cost of t:e
drilling program and the unavailability of additional funds.
The
Seabee team of two officers and 12 men have left Eniwetok to return
to their duty stations.
The Navy pontoons of which the drilling
platform was to have been constructed will be returned to Guan.
Project 11.4
Seismic Refraction Survey
Russell Raitt will be in charge of the refraction survey to be
conducted by tne Scripps Institution.
The survey will be made with
two fleet tugs (ATA), one serving as the firing vessel, the other as
the receiving station for the refracted seismic waves.
Scientific
personnel for the project will be drawn largely from the Scripps
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a
,
LLL