Rhodes University Logo

Prof (Emeritus) JS "Goonie" Marsh

Igneous Petrology

Ph.D. University of Cape Town (RSA)

Research Associate

E-mail: goonie.marsh(at)ru.ac.za



  • Petrology of Karoo and Etendeka continental flood basalt provinces
  • Petrology of alkaline igneous rocks


ORCID  Google Scholar



For a complete archive of Goonie's research outputs click here



Recent Journal and Book Publications


  • C. Antoine, R.A. Spikings, D. Miletic, J.S. Marsh, S. Gaynor, U. Schaltegger (2022) 40Ar/39Ar geochronology of the Drakensberg continental flood basalts: Understanding large argon isotopic variations in mafic groundmass and plagioclase size fractions: Chemical Geology, p. 121086.
  • J.S. Marsh (2020) Misrepresentation of early Karoo Volcanism: A critical discussion of aspects of “De Wit et al., 2020. Pillow talk: Volcanic rocks of the Karoo that formed many leagues under the Gondwanan Sea. South African Journal of Geology, doi: 0.25131/sajg.123.0021”. South African Journal of Geology, 123 (4), 647-652. 


  • E.R. Neumann, J.S. Marsh, C.Y. Galerne, S. Polteau, H. Svensen, S. Planke (2020) Co-existing low-Ti and high-Ti dolerites in two large dykes in the Gap Dyke swarm, southeastern Karoo Basin (South Africa). South African Journal of Geology, 123 (1), 19-34.


  • J.S. Marsh, D. Phillips, B.E. Lock (2019) 40Ar/39Ar dating of the Klinghardt and Stalhart Phonolites, Namibia, and Comments on the Evolution of the Klinghardt Volcanic Field. Communications Geological Survey of Namibia, 20.  


  • J.S. Marsh, R. Swart, (2018) The Bero Volcanic Complex: Extension of the Paraná-Etendeka Igneous Province into SW Angola.  Journal of Volcanology and Geothermal Research, 355, 21-31.

  • A.E. Jay, J.S. Marsh, F. Fluteau and V. Courtillot (2018) Emplacement of inflated pahoehoe flows in the Naude’s Nek Pass, Lesotho remnant, Karoo Continental Flood Basalt Province: use of flow-lobe tumuli in understanding flood basalt emplacement. Bulletin of Volcanology, 80, https://doi.org/10.1007/s00445-017-1189-6.

  • M. Moulin, F. Fluteau, V. Coutillot, J. Marsh, G. Delpech, X. Quidelleur,  and M. Gérard (2017) Eruptive history of the Karoo lava flows and their impact on Early Jurassic climate change. Journal of Geophysical Research Solid Earth, 122 122, 738–772

  • J. S. Marsh (2016) Karoo dolerite intrusions – shaping landscapes of the Great Karoo, 81-87.  In: Anhaeusser, CR, Viljoen, MR, and Viljoen, RP (Eds.) Africa’s Top Geological Sites. Struik Nature, Cape Town, 312pp.

  • J. S. Marsh (2016) New evidence for the correlation of basalts of the Suurberg Group with the upper part of the Karoo basalt sequence of Lesotho, 59-65. In: B. Linol and M. De Wit (Eds.) Regional Geology Reviews 8643: Origin and Evolution of the Cape Mountains and Karoo Basin, Springer Verlag.

  • H. H. Svensen, S. Planke, E-R. Neumann, I. Aarnes, J.S. Marsh, S. Polteau,  C. H. Harstad, and L. Chevallier (2015) Subvolcanic intrusions and the link to global climatic and environmental changes. Advances in Volcanology, doi: 10.1007/11157_2015_10.

  • C. Harris, P. Le Roux, R. Cochrane, L. Martin, A.R. Duncan, J.S. Marsh,  A.P le Roex and C. Class (2015) Oxygen isotope composition of Karoo and Etendeka picrites: High δ18O mantle or crustal contamination? Contributions to Mineralogy and Petrology, doi 10.1007/s00410-015-1164-1.

  • M. Moulin, F. Fluteau, V. Courtillot, J. Marsh, G. Delpech, X. Quidelleur, M. Gerard and A. Jay (2011) An attempt to constrain the age, duration, and eruptive history of the Karoo flood basalt: the Naude's Nek section (South Africa). Journal of Geophysical Research, 116, B07403, doi:10.1029/2011JB008210.

Recent Conference Presentations

  • J.S. Marsh,  C.M. Williams and H.V. Eales (2019) New Amalfi and Elephant's Head intrusions, Karoo Igneous Province: Differentiation and relationship. Abstract volume, Igneous and Metamorphic Studies Group meeting, Parys, South Africa. 

  • J.S. Marsh (2014) Sr, Nd, and Pb-isotopes in Cretaceous basanites, SW Angola – evidence for a HIMU component in the mantle source and crustal contamination.  Abstract volume, Igneous and Metamorphic Studies Group meeting, Grahamstown, South Africa. 

  • J.S. Marsh and R. Swart (2014) The Bero Volcanic Group: an extension of the Etendeka Igneous Province into the Namibe Basin, SW Angola.  Abstract, The Roy Miller Symposium, Windhoek, Namibia.

  • I. Sharp, K. Verwer, H. Ferreira, M. Snidero, V. Machado, E. Holtar, R. Swart, J. Marsh, L. Gindre, C. Puigdefabregas, and M. Fejersko. (2012) Pre- and Post-Salt non-marine carbonates of the Namibe Basin, Angola.  AAPG Search and Discovery Article # 90142, AAPG Annual Convention and Exhibition, Long Beach, California.

  • J.A. Lodge and J.S. Marsh (2011) Petrology and geochemistry of rare wide dykes in the basaltic sequence of Lesotho. Igneous and Metamorphic Studies Group meeting, Stellenbosch.

  • J.S. Marsh (2011) Volcanism in the on-shore Namibe Basin, SW Angola. Namibe Basin Seminar, Zebra River, Namibia.

  • J.S. Marsh (2011) Cretaceous volcanism in the on-shore Namibe basin, southern Angola. Abstract volume, Igneous and Metamorphic Studies Group meeting, Stellenbosch, South Africa. 


Last Modified: Mon, 03 Oct 2022 15:32:52 SAST