Dr Jaco Baas
Uwch Ddarlithydd

Contact info
Position: Reader
Room: 305 Craig Mair
Phone: 01248 382894
E-mail: j.baas@bangor.ac.uk
Web: Google Scholar, ResearchGate
I am Reader in Fine Particle Dynamics in the School of Ocean Sciences, and specialise in the erosion, transport, and deposition of fine, cohesive sediment. I graduated from the University of Utrecht (the Netherlands) with a combined BSc/MSc in Sedimentary Geology in 1988. At the same university, I completed my PhD in Bedform Dynamics in 1993. Subsequently, I was Postdoctoral Research Fellow at Geomar Research Centre in Kiel, Germany (studying Late-Pleistocene climate signals in slope sediments from the North-Atlantic continental margin), at the University of Rouen, France (on resuspension processes in the Seine estuary and gravel mining in the English Channel), and at the University of Bergen, Norway (investigating grain orientations in turbidite deposits).
In 1998, I moved to the School of Earth and Environment at the University of Leeds, where I started as a Marie Curie Research Fellow and then became a Senior Research Fellow. My research in Leeds included the physical properties of particulate density currents and their deposits and the dynamics of turbulence-modulated flows carrying cohesive clay particles. I took up my present post in Bangor in January 2007.
I am a process sedimentologist with more than 25 years of experience in sediment transport in fluvial, shallow marine, and deep-marine environments. My main fundamental and applied research interests include physical and biological cohesion in fine-grained sediment, the dynamics of sedimentary bedforms, and sediment gravity flows in the deep ocean, but my expertise also stretches to hydraulic engineering, palaeoclimatology, and mathematical modelling. I combine experimental research with field work to answer timely research questions, taking a blue-skies approach as well as collaborating with industry.
Research Area
- Cyhoeddwyd
5th International Conference on Marine & River Dune Dynamics (MARID), April 4th-6th, Caernarfon, UK
Van Landeghem, K., Garlan, T., Baas, J. H. & Van Landeghem, K. J. (Golygydd), 4 Ebr 2016, Unknown Publisher.Allbwn ymchwil: Llyfr/Adroddiad › Llyfr
- Cyhoeddwyd
A phase diagram for turbulent, transitional and laminar clay suspension flows.
Baas, J. H., Best, J. L., Peakall, J. & Wang, M., 1 Maw 2009, Yn: Journal of Sedimentary Research. 79, 3-4, t. 162-183Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
An experimental model for turbulence modulation in natural clay-laden flows over flat beds, ripples and dunes.
Baas, J. H., Best, J. L. & Kellman, P., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
An integrated process-based model of flutes and tool marks in deep-water environments: implications for palaeohydraulics, the Bouma sequence, and hybrid event beds
Peakall, J., Best, J., Baas, J. H., Hodgson, D. M., Clare, M. A., Talling, P. J., Dorrell, R. M. & Lee, D. R., Meh 2020, Yn: Sedimentology. 67, 4, t. 1601-1666 66 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Bedform development below transient turbulent, partly cohesive open-channel flows.
Baas, J. H., Best, J. L. & Kellman, P., 1 Ion 2007.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Bedform development in mixed sand–mud: The contrasting role of cohesive forces in flow and bed
Baas, J. H., Davies, A. G. & Malarkey, J., 15 Ion 2013, Yn: Geomorphology. 182, t. 19-32Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Bedform migration in a mixed sand and cohesive clay intertidal environment and implications for bed material transport predictions
Lichtman, I. D., Baas, J. H., Amoudry, L. O., Thorne, P. D., Malarkey, J., Hope, J. A., Peakall, J., Paterson, D. M., Bass, S. J., Cooke, R. D., Manning, A. J., Davies, A. G., Parsons, D. R. & Ye, L., 15 Awst 2018, Yn: Geomorphology. 315, t. 17-32 66 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Bedforms in high concentration flows – Preliminary results of laboratory experiments.
Kellman, P., Best, J. L., Baas, J. H., Peakall, J. & Parsons, D., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Behaviour of fully ponded turbidity currents in confined basins: An experimental study.
Patacci, M., McCaffrey, W. M., Haughton, P., Baas, J. H. & Keevil, G., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Biomediation of submarine sediment gravity flow dynamics
Craig, M., Baas, J. H., Amos, K. J., Strachan, L. J., Manning, A. J., Paterson, D. M., Hope, J. A., Nodder, S. D. & Baker, M. L., Ion 2020, Yn: Geology. 48, 1, t. 72-76Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Blood, lead and spheres: a hindered settling equation for sedimentologists based on metadata analysis
Baas, J. H., Baker, M. L., Buffon, P., Strachan, L. J., Bostock, H. C., Hodgson, D. M., Eggenhuisen, J. T. & Spychala, Y. T., Meh 2022, Yn: The Depositional Record. 8, 2, t. 603-615 13 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Can sedimentological flows with small amounts of clay particles form massive sandstone beds?
Baas, J. H. & Best, J. L., 1 Ion 2001.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Can vertical stacking of low-angle bedforms produce rhythmic bedding in slurry flow deposits.
Baas, J. H., Best, J. L. & Peakall, J., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Can vertical stacking of low-angle bedforms produce rhythmic bedding in slurry flow deposits?
Baas, J. H., Best, J. L. & Peakall, J., 1 Ion 2007.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Clast-rich debrite and slurry intervals sandwiched within co-genetic turbiditic sandstone: origin, lateral extent and baffle potential.
Talling, P., Amy, L., McCaffrey, B., Baas, J. H., Peakall, J., Stanbrook, D., Clark, J., Wynn, R., Gee, M. & Masson, D., 1 Ion 2001.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Clay-laden currents: transition between turbulent and laminar flow and implications for the genesis of massive sand beds.
Baas, J. H. & Best, J. L., 1 Ion 2000.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- E-gyhoeddi cyn argraffu
Coming to light: How effective are sediment gravity flows in removing fine suspended carbonate from reefs?
Baas, J., Hewitt, W., Lokier, S. & Hendry, J., 27 Tach 2024, (E-gyhoeddi cyn argraffu) Yn: The Depositional Record.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Comparing flume and computer simulated turbidite flows – Implications for sediment deposition patterns and reservoir quality.
Bond, C. E., Baas, J. H., Vinnels, J., McCaffrey, W., Waltham, D. & McClean, S., 1 Ion 2008.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Comparing the transitional behaviour of kaolinite and bentonite suspension flows
Baas, J., Best, J. L. & Peakall, J., Hyd 2016, Yn: Earth Surface Processes and Landforms. 41, 13, t. 1911-1921Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Comparison of spatio-temporal evolution of experimental particulate gravity flows at two different initial concentrations, based on velocity, grain size and density data.
Choux, C. M., Baas, J. H., McCaffrey, W. D. & Haughton, P. D., 1 Awst 2005, Yn: Sedimentary Geology. 179, 1-2, t. 49-69Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Comparison of spatio-temporal evolution of experimental particulate gravity flows at two different initial concentrations, based on velocity, grain size and density data.
Choux, C., Baas, J. H., McCaffrey, W. D. & Haughton, P. D., 1 Ion 2004.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Concepts and applications of fluvial sedimentology: Towards interdisciplinary analysis of process and product.
Weltje, G. J., Hoogendoorn, R. M., Marriott, S. B. & Baas, J. H., 15 Tach 2007, Yn: Sedimentary Geology. 202, 1-2, t. 1-4Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Conditions for formation of massive turbiditic sandstones by primary depositional processes.
Baas, J. H., 1 Ebr 2004, Yn: Sedimentary Geology. 166, 3-4, t. 292-310Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Confined Turbidite Systems, by S.A. Lomas & P. Joseph
Baas, J. H., 1 Ion 2004, Unknown.Allbwn ymchwil: Cyfraniad arall › Cyfraniad Arall
- Cyhoeddwyd
Coupling between suspended sediment distribution and turbulence structure in a laboratory turbidity current.
Baas, J. H., McCaffrey, W. D., Haughton, P. D. & Choux, C., 1 Ion 2005, Yn: Journal of Geophysical Research - Oceans. 110, c11, t. C11015Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Coupling flow and deposit properties of partly cohesive high-density turbidity currents: An experimental approach.
Manica, R., Baas, J. H., Peakall, J., Maestri, R. D. & Borges, A. O., 1 Ion 2008.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Critical parameters for cross-fault flow within deep marine clastic reservoirs: An integrated 3D stratigraphic and structural approach.
Bradbury, P. W., Freeman, S. R., Harris, S. D., Knipe, R. J., McCaffrey, W. D. & Baas, J. H., 1 Ion 2004.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Current- and Wave-Generated Bedforms on Mixed Sand–Clay Intertidal Flats: A New Bedform Phase Diagram and Implications for Bed Roughness and Preservation Potential
Baas, J., Malarkey, J., Lichtman, I. D., Amoudry, L. O., Thorne, P., Hope, J. A., Peakall, J., Paterson, D. M., Bass, S., Cooke, R. D., Manning, A. J., Parsons, D. & Ye, L., 3 Tach 2021, Yn: Frontiers Earth Science. 9, 747567.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Depositional processes, bedform development and hybrid bed formation in rapidly decelerated cohesive (mud–sand) sediment flows
Baas, J. H., Best, J. L. & Peakall, J., 1 Rhag 2011, Yn: Sedimentology. 58, 7, t. 1953-1987Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Deposits of depletive high-density turbidity currents: a flume analogue of bed geometry, structure and texture.
Baas, J. H., Van Kesteren, W. & Postma, G., 1 Hyd 2004, Yn: Sedimentology. 51, 5, t. 1053-1088Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Detection and quantification of suspended sediment concentration and stratification in open channel flows: development and first results using electrical resistance tomography.
Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 5 Medi 2005.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Detection and quantification of suspension concentrations and sedimentation layers in channel flows using electrical resistance tomography.
Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 1 Ion 2005.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Directional petrological characterisation of deep-marine sandstones using grain fabric and permeability anisotropy: methodologies, theory, application and suggestions for integration.
Baas, J. H., Hailwood, E. A., McCaffrey, W. D., Kay, M. & Jones, R., 1 Mai 2007, Yn: Earth Science Reviews. 82, 1-2, t. 101-142Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Discontinuity in Equilibrium Wave–Current Ripple Size and Shape and Deep cleaning associated with Cohesive Sand–Clay Beds
Wu, X., Fernández, R., Baas, J., Malarkey, J. & Parsons, D. R., Medi 2022, Yn: Journal of Geophysical Research: Earth Surface. 127, 9, t. e2022JF006771 e2022JF006771.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Wedi ei Dderbyn / Yn y wasg
Distinguishing microbially induced sedimentary structures from fluid-induced interfacial deformation structures (MISS versus FIDS)
Wignall, P. B., Peakall, J., Best, J. & Baas, J., 4 Maw 2025, (Wedi ei Dderbyn / Yn y wasg) Yn: The Geological Society Special Publications.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Does sand promote or hinder the mobility of cohesive sediment gravity flows?
Baker, M. L. & Baas, J., Chwef 2023, Yn: Sedimentology. 70, 4, t. 1110-1130 21 t.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Duration of deposition from decelerating high-density turbidity currents.
Baas, J. H., Van Dam, R. L. & Storms, J. E., 1 Hyd 2000, Yn: Sedimentary Geology. 136, 1-2, t. 71-88Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Dynamics and deposition of sediment-bearing multi-pulsed flows and geological implication
Ho, V. L., Dorrell, R. M., Keevil, G., Thomas, R. E., Burns, A. D., Baas, J. H. & McCaffrey, W. D., Tach 2019, Yn: Journal of Sedimentary Research. 89, 11, t. 1127-1139Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
EZ-ROSE: a computer program for equal-area circular histograms and statistical analysis of two-dimensional vectorial data.
Baas, J. H., 1 Maw 2000, Yn: Computers and Geosciences. 26, 2, t. 153-166Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Earth Science Editorial.
Baas, J. H., 1 Gorff 2002, Yn: Annals of the Marie Curie Fellowships. 2, t. 34Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Earth Science Editorial.
Baas, J. H., 1 Chwef 2004, Yn: Annals of the Marie Curie Fellowships. 3, t. 42Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Effect of Bed Clay on Surface Water-Wave Reconstruction from Ripples
Malarkey, J., Pollard, E., Fernández, R., Xuxu, W., Baas, J. & Parsons, D., 28 Rhag 2024, Yn: Scientific Reports. 14, 1, t. 30688 30688.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Effect of biological polymers on mobility and run-out distance of cohesive and non-cohesive sediment gravity flows
Sobocinska, A. & Baas, J., 1 Hyd 2022, Yn: Marine Geology. 452, 106904.Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Electrical resistance tomography for suspended sediment measurements in open channel flows using a novel sensor design.
Schlaberg, H. I., Baas, J. H., Wang, M., Best, J. L., Williams, R. A. & Peakall, J., 1 Hyd 2006, Yn: Particle and Particle Systems Characterization. 23, 3-4, t. 313-320Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid
- Cyhoeddwyd
Enhanced fault seal evaluation of turbidite systems in mature basins: Examples from around the globe.
Bradbury, P. W., Freeman, S. R., Harris, S. D., Knipe, R. J., McCaffrey, W. D., Baas, J. H. & Lewis, G., 1 Ion 2005.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Experimental Research on Hydraulics and Depositional Mechanisms of High-Density Turbidity Currents.
Baas, J. H., 1 Ion 2000, 2000 gol. Unknown.Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn
- Cyhoeddwyd
Experimental constraints on shear mixing rates and processes: implications for the dilution of submarine debris flows
Talling, P. J., Peakall, J., Sparks, R. S., O'Cofaigh, C., Dowdeswell, J. A., Felix, M., Wynn, R. B., Baas, J. H., Hogg, A. J., Masson, D. G., Taylor, J. & Weaver, P. P., 1 Ion 2002, Glacier-Influenced Sedimentation on High-Latitude Continental Margins. 2002 gol. Geological Society Publishing House, t. 89-104Allbwn ymchwil: Pennod mewn Llyfr/Adroddiad/Trafodion Cynhadledd › Pennod
- Cyhoeddwyd
Experimental model for turbulence modulation in natural clay-laden flows.
Baas, J. H., Best, J. L., Peakall, J. & Wang, M., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Experimental passive fill of U-shaped burrows.
Kellman, P., Baas, J. H., Best, J. L. & Uchman, A., 1 Ion 2005.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur
- Cyhoeddwyd
Experimental turbidity current transport and deposition using scaled realistic bathymetry.
Baas, J. H., McCaffrey, W. D., Pattaci, M. & Wyton, J., 1 Ion 2006.Allbwn ymchwil: Cyfraniad at gynhadledd › Papur