Abstract
A recently discovered seamount in the New England seamount chain, the Gilliss seamount, was selected for a detailed geological and geophysical study. From seismic profiler data it was noticed that two distinct acoustic patterns are present in the immediate vicinity of the seamount, one transparent, the other highly layered. Analysis of piston cores indicated the presence of foraminiferal ooze which could be related with the transparent acoustic pattern and turbidites representing the highly layered seismic pattern. Petrological and chemical studies of rock dredged from the seamount revealed the presence of extremely altered pillow lava fragments of basaltic composition.
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