Stephen P Altaner

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Personal profile

Research Interests

Professor Altaner's principal research interests lie in the fields of the petrology (occurrence, origin, and geological significance), geochemistry, and mineralogy of clay minerals and sedimentary rocks.


  • GEOL 100: Planet Earth
  • GEOL 110: Exploring Geology in the Field
  • GEOL 118: Natural Disasters
  • GEOL 333: Earth Material and the Environment
  • GEOL 380: Environmental Geology


  • Ph.D., University of Illinois

Office Address

3014 Natural History Bldg

Office Phone


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Research Output

Alteration history of Mount Epomeo Green Tuff and a related polymictic breccia, Ischia Island, Italy: Evidence for debris avalanche

Altaner, S., Demosthenous, C., Pozzuoli, A. & Rolandi, G., May 2013, In : Bulletin of Volcanology. 75, 5, p. 1-13 13 p., 718.

Research output: Contribution to journalArticle

  • Geothermometry, geochronology, and mass transfer associated with hydrothermal alteration of a rhyolitic hyaloclastite from Ponza Island, Italy

    Altaner, S. P., Ylagan, R. F., Savin, S. M., Aronson, J. L., Belkin, H. E. & Pozzuoli, A., Jan 15 2003, In : Geochimica et Cosmochimica Acta. 67, 2, p. 275-288 14 p.

    Research output: Contribution to journalArticle

  • Origin and diagenesis of lacustrine sediments, upper oligocene creede formation, southwestern Colorado Discussion: Reply

    Finkelstein, D. B., Hay, R. L. & Altaner, S. P., Apr 1 2001, In : Bulletin of the Geological Society of America. 113, 4, p. 541-544 4 p.

    Research output: Contribution to journalArticle

    Alteration history of volcaniclastic sediments in the upper Oligocene Creede Formation, southwestern Colorado

    Finkelstein, D. B., Altaner, S. P. & Hay, R. L., Jan 1 2000, In : Special Paper of the Geological Society of America. 346, p. 209-232 24 p.

    Research output: Contribution to journalArticle

  • Reaction mechanisms of smectite illitization associated with hydrothermal alteration from Ponza Island, Italy

    Ylagan, R. F., Altaner, S. P. & Pozzuoli, A., Dec 2000, In : Clays and Clay Minerals. 48, 6, p. 610-631 22 p.

    Research output: Contribution to journalArticle