current events


RioMAR is a colaborative research program between Colorado School of Mines (PI: Piret Plink-Björklund) and University of Texas (PI's: Ronald Steel, David Mohrig and Cornel Olariu) suported by:

Former Sponsor:

The 2009 RioMAR Annual reports were submitted in February and loaded on the consortium website (link below)

Short version of the RioMAR3 proposal. A longer version and projects details posted in the Members' Area.

Some sponsors have also access to the previous WOLF consortium webpage
April 2010 Highlights

RioMAR presentations at the AAPG 2010 (April 11th-14th) annual conference in New Orleans, Louisiana

The Greenhouse and Icehouse Margins and Shelf-Edge Trajectories: Significance for Sediment By-Pass.  R. Steel ; A. Petter; C. Carvajal; P. Plink-Bjorklund

Laboratory-Scale Channel Formation by Sheet-Like Density Underflows.  A. M. Fernandes ; J. Buttles; D. Mohrig; R. J. Steel; S. Henriksen

Shelf Margin Facies of the Kookfontein Formation: Impact of Process Regime Changes and Delta Position Relative to the Shelf Edge.  A. Green ; P. Plink-Björklund

Process and Architectural Evolution During Deltaic Cross-Shelf Transits – Fox Hills Deltas, Washakie Basin, Wyoming .  M. I. Olariu ; C. Carvajal; R. J. Steel; C. Olariu

Source-to-Sink: Connecting Hyperpycnal-Flow Deposits to River-Flood Dynamics.  M. Lamb ; D. Mohrig; B. McElroy; B. Kopriva; J. Shaw

Determining How Much Topographic Complexity Must Be Incorporated into Models for Depositional Turbidity Currents Filling Sinuous Submarine Channels and Constructing Channel Levees.  A. B. Peyret ; D. Mohrig; M. Lamb; B. McElroy

Backwater Implications for Sediment Transport and Channel Morphology in the Lowermost Mississippi River.  J. A. Nittrouer ; D. Mohrig; M. Allison; W. Kim; G. Parker

Decoupling Allogenic Forcing from Autogenic Processes: Clastic and Carbonate Experimental Stratigraphy.  W. Kim ; A. Petter; B. W. Fouke; T. M. Quinn; C. Kerans; F. Taylor; D. Mohrig; C. Paola

When Does Spatial Variation in Subsidence Rate Influence the Positioning of Channels Within Quaternary Strata of Mississippi River Delta?.  D. Mohrig ; K. Straub; A. C. De la Rosa Illescas

Delta Architecture and Process Variability During Cross-Shelf Transits; Autogenic and Allogenic Responses.  C. Olariu; R. J. Steel

Source-to-Sink Sediment Volumes Within a Tectono-Stratigraphic Model for a Laramide Shelf-to-Deep-Water Basin.  C. Carvajal ; R. J. Steel

Basin-Fill Geometry of Eocene Tyee Basin – From Fluvial Deposits to Extensive Sand-Rich Basin Floor Fans.  M. Santra ; R. Steel; M. L. Sweet

Miocene Shelf-Edge Delta Behaviour and Influence on Deepwater Slope Morphology, Northwest Shelf of Australia.  C. M. Sanchez ; R. J. Steel; C. S. Fulthorpe; J. A. Austin



May 2009 Highlights

Michael Lamb, JSG Post Doc, UT Austin

Connecting Source to Sink: Dynamics and Deposits of Plunging River Plumes

during Soft Rock Seminar at UT Austin

Julio Leva López from UT Austin

went in the field to study the

Twentymile Sandstone outcrops in Sand Wash for his PhD Project


April 2009 Highlights

Andrew Petter, PhD. Candidate presented:

The Castlegate Debate: Was Pinchout of the Lower Castlegate SS Stratigraphic or Structural in Origin? Insights From Integration of Physical/Numerical Models and Paleohydraulics

in 'Technical Sessions' of

Department of Geological Sciences



February/ March 2009 Highlights

Allison Green from Colorado School of Mines and

Josh Dixon from University of Texas

are in the field for 6 weeks to collect data on Permian shelf deposits of Tanqua Formation, SW Karoo Basin, South Africa

December 2008/ January 2009 Highlights

Talk at 'River to Rock Record' conference in Aberdeen (Jan 14th)

Cretaceous Shoreline-Attached Fluvial Systems within Source-to-Sink Transects

Ron Steel and Carolina Gomez ,University of Texas, Austin

Talk at the Norwegian Geological Society Annual
Meeting in Bergen Norway (Jan 12th-14th)


Ron Steel and Cornel Olariu, University of Texas, Austin

Research Article in Journal of Sedimentary Research volume 79:


Anna Pontén and Piret Plink-Björklund

Andy Petter presented the talk: Estimating Sediment Flux and Load from Ancient Shelf-margin Successions,

co-authored with Cristian Carvajal, David Mohrig and Ron Steel, at the Jackson School of Geosciences Soft Rock Seminar

November 2008 Highlights


On November 13 th and 14th representatives of RioMAR consortium member companies participated to the annual meeting at the University of Texas

It has been published SEPM Special Publication No.90 "Recent Advances in Models of Siliciclastic Shallow-Marine Stratigraphy"

Edited by: Gary J. Hampson, Ronald J. Steel, Peter M. Burgess and Robert W. Dalrymple

The book contain few articles authored by RioMAR scientists

Ron Steel presented the keynote talk "Deltas and estuaries: how do they grow the shelf and shelf-margin prism" co-authored with Cornel Olariu in London at the Geological Society of London meeting "Rivers, Estuaries, Deltas & Beaches ".


October 2008 Highlights

Andy Petter presented the poster " Similarity in Fluvial-Channel Dimensions Between Blackhawk Fm (Grassy Member) and Lower Castlegate Ss, Eastern Book Cliffs, Utah" co-authored with Ron Steel and David Mohrig during the annual GSA meeting in Houston.

Cornel Olariu presented the talk "Location of the Lowstand Depocenters along the Shelf-Edge and Influence on Shelf Margin Stratigraphy" co-authored with Ron Steel during the annual GSA meeting in Houston.

University of Texas Class Fieldtrip to

20 Mile Sandstone in Colorado

Possible future RioMAR project


Ron Steel and Piret Plink-Björklund visited the Karoo shelf margin outcrops together with representatives of University of Liverpool to agree on a colaborative field strategy for RioMAR Karoo shelf margin project.

David Mohrig and co-workers are working hard to finish the large flume tank at Pickle Research Campus, University of Texas.

September 2008 Highlights

Carlos Uroza defended his PhD dissertation "Processes And Architectures Of Deltas In Shelf-Break And Ramp Platforms: Examples From The Eocene Of West Spitsbergen (Norway), The Pliocene Paleo-Orinoco Delta (Se Trinidad), and the Cretaceous Western Interior Seaway (SW Wyoming and NE Utah)". Carlos accepted a position with ConocoPhillips.

Andy Petter has been announced in the AAPG Explorer as second price winner for his talk "Small Lowstand Deltas as a Consequence of Sustained Alluvia Aggradation During Relative Sea-Level Fall" presented during the annual AAPG 2008 meeting.

Ron Steel visited Geophysical Institute of the Academy of Sciences of the Czech Republic in Prague, Czech Republic. He presented a talk "PROCESS CHANGE DURING BASE-LEVEL CYCLES & CROSS-SHELF TRANSITS" and had a field trip to Bohemian Cretacous Basin to look at tidal deposits.