REFERENCES ---------- 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 ... ---------------------- This profile was one of the reversed ones.