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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“Doomed pioneers” – my favorite turbidite ichnofacies!

And, no I am not talking about the Donner Party (hooray, wikipedia links are back!).  I am talking about a 1990 Geology paper by Follmi and Grimm called "Doomed pioneers: Gravity-flow deposition and bioturbation in marine oxygen-deficient environments."  The doomed pioneers in this case are shrimp burrows of the ichnofacies Thalassinoides and Gyrolithes that were brought from shallow water into the …

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Geology on the Wing Wednesdays #10 – Sandy Creek winding through the drought-stricken Hill Country, Texas

Whew! I had a hectic holiday season, but a great one.  Too great, in fact, to be blogging.  So now I am back in the swing of things, here is a quick photo from a recent trip to see family.  Contrary to popular opinion, there is topography in Texas!  Here is a nice shot of …

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Geology on the Wing Wednesdays #8 – Abandoned Sabine river delta near Cameron, Louisiana

The Sabine river has a very interesting coastal history, mostly documented by Rufus LeBlanc.  He shows a pattern of modern avulsions of the river updip from the coastline, leading to at least two deltas.  Due to low sediment supply and the position of the coastline with the dominant Gulf winds, the deltas are wave dominated. …

Continue reading Geology on the Wing Wednesdays #8 – Abandoned Sabine river delta near Cameron, Louisiana