AUTHOR     = A.S. Laughton andC. Tramontini
YEAR       = 69
FIGNUMBER  = Generated from table I
SOURCE     = Tectonophysics, Vol 8 (1969), 359-375
TITLE      = Recent Studies of the Crustal Structure in the Gulf of Aden

About the experiment in general ...
The data for this profile was obtained during an expedition in R.R.S.  
"Discovery", Spring of 1967.  One of the objectives of this experiment 
was to determine the crustal structure by the seismic refraction 
method in areas critical to the theory of continental separation.
Two reversed and four unreversed seismic refraction stations were shot 
using the Hill technique of sono-radio buoys and single ship shooting.  
Shots were fired during the night between 23.00 and 4.00 because 
experience showd that this time was most free from radio interference.  
Arrivals were obtained out to a maximum range of 52 sec (80 km). Four 
buoys were usually laid covering a range of 1.5-3 miles (2.8-5.5 km).  
At each station a profile of sound velocity in the sea to 820 fathoms 
(1,500 m) was obtained using a velocimeter.  The surface horizontal 
velocity could therefore be calculated for use in the reduction of the 
seismic data.

About this profile ...
The line was shot to the east and was not reversed.  Corrections for 
the topography were based on the assumption that all layers were 
parallel to the botton.

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