Submarine Barite-Opal Rocks of Hydrothermal Origin

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Science  11 Apr 1975:
Vol. 188, Issue 4184, pp. 150-152
DOI: 10.1126/science.188.4184.150


Unusual submarine rocks consisting of barite, opal, and volcanic detritus were recovered from the Lau Basin northeast of Australia. It is proposed that these rocks were formed when hydrothermal solutions emanating from a fracture zone offsetting the active spreading center in the Lau Basin came into contact with cooler ocean waters.