On the Biloxi Dome, undersea volcano

The Biloxi Dome is prominently mentioned in the post “Ideas About BP/Macondo…

Here is a picture of it:

undersea_saltdomes

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Source of Gulf Oil Plumes: 7 Miles from Deepwater Horizon

A High-Resolution Survey of a Deep Hydrocarbon Plume in the Gulf of Mexico During the 2010 Macondo Blowout

The Source of the Gulf Oil Plumes is 7 Miles Southeast of Deepwater Horizon at an Ancient Volcanic Dome

Dive 06: Mystery Seeps South of the Biloxi Dome

Dive 06 of this expedition really began about seven months ago during what we call a water column mapping cruise on the Okeanos Explorer.  During this earlier cruise, we used the echo sounders on the ship — a 30-kHz deepwater multibeam and an 18-kHz split-beam — to map acoustic anomalies in the water column.

We were mainly looking for evidence of natural seeps of methane bubbles: gas bubbles rising from the seafloor show up as strong acoustic echoes in the echo sounder data.  We made hundreds of observations that indicated the presence of gas bubbles in the water column. This was no surprise — we were mapping in the northern Gulf of Mexico, an oil and gas province known for having many natural seeps.  As expected, most of the gas seeps we found were located on the edges of salt domes where faults can provide pathways for deep gas to reach the seabed and escape into the water column.

We were mystified, though, by a few of the seeps that we found in what appeared to be a featureless, flat area of the seabed about five kilometers south of the nearest salt dome — the Biloxi Dome. . . .

short link –  http://wp.me/p2GNDM-3np

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