Submarine landslide deposits – a spectacular outcrop example from Japan

I tweeted an image that got a lot of attention the other day and wanted to follow it up with a quick post describing the deposit.  The back story is this: Lesli Wood, a submarine landslide expert, showed an image at a recent conference that is a spectacular example of a mass transport deposit (MTD), or …

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Submarine slide captured off Gabon in 2005

"Submarine slide initiation and evolution offshore Pointe Odden, Gabon — Analysis from annual bathymetric data 2004–2009". Check out this paper from the coast of Gabon, where the authors use repeat multibeam surveys to capture a large-scale slope failure very near the coast.  They estimate that more than 2 million cubic meters of sediment were evacuated …

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New Zealand turbidite field trip – Day 4: Mass transport deposits

Holy cow.  It just keeps getting better.  I can honestly say that my mind was blown today.  We saw some mass transport deposits (MTDs) that are truly seismic in scale!  Maybe not as big as the Storegga slide, but pretty dang big.  For a nice paper on MTDs, go here.  Since there is a student …

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New Zealand turbidite field trip – Day 2-3: Submarine lobe deposits

Wow, these rocks are fantastic! The last two days we have been looking at submarine lobes exposed along the Taranaki coast. Lobes are areas downstream of submarine channels where the gradient decreases (i.e. becomes quasi-flat) and turbidity currents deposit sand in an oblate shape emanating from the channel. For a great paper on lobes, see …

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Conglomeratic submarine canyon fill, Point Lobos, California

Wow, this is one of the best normally graded turbidites I have ever seen!  I saw this at the Point Lobos State Natural Preserve near Monterey, CA on a recent field trip with SPODDS (my former research group) .  These rocks exposed along the Pacific coast have been uplifted by San Andreas transpression, and they are …

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