Stratigraphic Response to Evolving Geomorphology in a Submarine Apron Perched on the Upper Niger Delta Slope

This submarine apron is an analog for the stratigraphic architecture of shallow ponded basins common to stepped, above-grade slopes, where late-stage bypass valleys and channels did not form. Depositi…

January 1, 2012 · B. E. Prather, C. Pirmez, Z. Sylvester, D. S. Prather

Salt and sediment: a brief history of ideas

Salty weirdness Salt is a weird kind of rock. At first sight, it behaves like most other rocks: if you pick up a piece, it is hard, it is heavy, and it breaks if hit with a hammer. But put it under stress for thousands of years, and salt will behave like a fluid: relatively small forces can cause it to flow toward less stressful surroundings. This often means it will try to find its way to the surface. ...

July 16, 2011 · Zoltán Sylvester

Stretching the truth: vertical exaggeration of seismic data

If someone showed a photograph of the famous Cuernos massif (Torres del Paine National Park, Chile) like the one below, it would be - probably, hopefully - obvious to everybody that something is wrong with the picture. Our eyes and brains have seen enough mountain scenery that we intuitively know how steep is ‘steep’ in alpine landscapes. The peaks in this photograph just look too extreme, too high if one takes into account their lateral extent. ...

April 18, 2011 · Zoltán Sylvester

A model of submarine channel-levee evolution based on channel trajectories: Implications for stratigraphic architecture

Channel-levee systems are frequently interpreted as having a long history of cut-and-fill by channel-shaped features of different scales. Results from a simple geometric model based on a centerline mi…

January 1, 2011 · Z. Sylvester, C. Pirmez, A. Cantelli

Turbidite channel architecture: Recognizing and quantifying the distribution of channel-base drapes using core and dipmeter data

Field and simulation studies indicate that channel architecture and the presence of channel-base drapes (CBDs) can have a significant impact on oil recovery and represent key uncertainties in the unde…

January 1, 2010 · M. Barton, C. O'Byrne, C. Pirmez, B. Prather, F. Van der Vlugt, F. O. Alpak, Z. Sylvester

Architecture of a Deep-water Levee Avulsion, Silla Ojo Mesa, Parque Nacional Torres del Paine, Chile

Extensive outcrops of coarse-grained channel to fine-grained levee deposits of the Campanian Cerro Torro Formation are present throughout the Torres del Paine National Park in southern chile (Figure 1…

January 1, 2008 · C. J. O’Byrne, B. E. Prather, Z. Sylvester, C. Pirmez, B. Couzens, R. Smith, M. Barton, G. Steffens, J. Willson