From Clastic Detritus: Sea-Floor Sunday #22: A actively-growing mound on the sea floor (Hat tip: Anaconda)
A paper came out in Marine Geology last month (v. 250, p. 258-275) about a methane-seeping, actively-growing sea-floor mound in Santa Monica Basin (offshore Los Angeles, CA).Here is the abstract: Association among active seafloor deformation, mound formation, and gas hydrate growth and accumulation within the seafloor of the Santa Monica Basin, offshore California.
It’s like a zit on the sea floor!!
Continuous streams of methane gas bubbles emanate from the crest of the northeastern mound, and extensive methane-derived authigenic carbonate pavements and chemosynthetic communities mantle the mound surface.