Dr. Louis Zachos

Areas of Expertise

Paleontology, Biogeoscience, Geographic Information Systems, Mathematical Geoscience

Recent Projects


Ichnological zonation of a modern macro-tidal flat and comparison with Early Pennsylvanian intertidal paleoichnology

Extrapolation to trace fossil suites of intertidal deposits in the geologic record will aid interpretation of microenvironments and tidal ranges of these past depositional environments.








Paleocene echinoid faunas of the eastern United States

A comprehensive review of echinoid species from the Paleocene of the Gulf and Atlantic coastal plains of the US, including extensive new collections from the outcrop belt in southeastern US.






Flood vulnerability indices and emergency management planning in the Yazoo Basin, Mississippi

A method is developed in which indicators are used to categorize the vulnerability to catastrophic flooding by considering physical, social, economic, and environmental components of susceptibility.


Publications

Johnson, J., B.S. Haley, L.G. Zachos, 2016, Reassessing Mississippian floodplain adaptation in the northern Yazoo Basin of western Mississippi, In M.B. Trubitt, Ed., Research, Preservation, Communication: Honoring Thomas J. Green on His Retirement from the Arkansas Archeological Survey, Arkansas Archeological Survey Research Series 67, 127-143.

Zachos, L.G., C.T. Swann, M.S. Altinakar, M.Z. McGrath, D. Thomas, 2016, Flood vulnerability indices and emergency management planning in the Yazoo Basin, Mississippi, International Journal of Disaster Risk Reduction, 18:89-99.

Ziegler, A., J. Lenihan, L.G. Zachos, C. Faber, R. Mooi, 2016, Comparative morphology and phylogenetic significance of Gregory’s diverticulum in sand dollars (Echinoidea: Clypeasteroida), Organisms Diversity and Evolution, 16:141-166.

Zachos, L. G., 2015, Holistic morphometric analysis of growth of the sand dollar Echinarachnius parma (Echinodermata: Echinoidea), Zootaxa, 4052:151-179.

Zachos, L.G., 2015, MorphoBank Project 2276, Holistic morphometric analysis of growth of the sand dollar Echinarachnius parma (Echinodermata: Echinoidea), Project DOI: 10.7934/P2276.

Ziegler, A., J. Lenihan, L.G. Zachos, C. Faber, R. Mooi, 2015, MorphoBank Project 2202, Comparative morphology and phylogenetic significance of Gregory’s diverticulum in sand dollars (Echinoidea: Clypeasteroida), Project DOI: 10.1007/s13127-015-0231-9

Zachos, L. G., and C. T. Swann, 2014, Contribution of subtle geomorphic features of the Mississippi River Alluvial Plain to flood vulnerabilities - A case study: Gulf Coast Association of Geological Societies Transactions, 64:453-462.

Ibrahim, M., M. Na, J. Oh, R. Schinazi, T. McBrayer, T. Whitaker, R. Doerksen, D. Newman, L. Zachos, and M. Hamann, 2013, Significance of endangered and threatened plant natural products in the control of human disease, Proceedings of the National Academy of Sciences, 110, 16832-16837.

Molineux, A., L. Zachos, and U. Karadker, 2013, The search for Devil's Eye: Retracing the historic Dumble survey with modern mobile technology, in: Hunt, B. B. and Catlos, E. J., Eds.), Late Cretaceous to Quaternary Strata and Fossils of Texas: Field Excursions Celebrating 125 Years of GSA and Texas Geology, GSA South-Central Section Meeting, Austin, Texas, April 2013, Vol. Field Guide 30. The Geological Society of America, Boulder, Colorado 2013, pp. 33-41.

Zachos, L.G., 2012, A new genus and species of echinoid (Echinoidea, Spatangoida) from the Oligocene (Rupellian) of Mississippi, Southeastern Geology, 49:43-48.

Molineux, A., L. Zachos, K. Criswell and T. Risien, 2012, GIS, the key to collections management of a large research archive, Collection Forum, 26(1-2):60-69.

Zachos, L.G. and J. Sprinkle, 2010, Computational modeling of growth and development of Paleozoic echinoids, In Computational Paleontology, Ashraf M.T. Elewa, Ed., Springer-Verlag, p. 75-93.

Molineux, A., R. Scott, J. Maissano, R. Ketcham and L.G. Zachos, 2010, Blending rudists with technology; Non-destructive examination of the internal and external structures of rudists using high quality scanning and digital imagery, Turkish Journal of Earth Sciences, 19:1-11.

Zachos, L.G. and D. Levin, 2010, Rediscovery of figured Paleogene echinoid specimens from Clark and Martin (1901), Journal of Paleontology, 84(1):148.

Zachos, L.G., 2010, Modeling echinoid skeletal growth: A first principles approach, In Echinoderms : Durham, Proceedings of the 12th International Echinoderm Conference, Durham, NH, L.G. Harris, S.A. Böttger, C.W. Walker, M.P. Lesser, Eds., CRC Press/Balkema, Boca Raton, 299-304.

Zachos, L.G., 2009, The sand dollar Periarchus lyelli (Echinoidea: Clypeasteroida: Scutelliformes) in the Caddell Formation (Upper Eocene) of Texas, Texas Journal of Science, 61(3):181-186.

Zachos, L.G., 2009, A new computational growth model for sea urchin skeletons, Journal of Theoretical Biology, 259:646-657.

Zachos, L.G., 2008, Preservation of echinoid fossils, Paleocene and Eocene of Texas, Gulf Coast Association of Geological Societies Transactions, 58:919-932.

Zachos, L.G., A. Smadi, and F. Ahmad, 2008, Oligocene echinoids from Wadi al Ghadaf, Jordan, Rivista Italiana di Paleontologia e Stratigrafia, 114:1:41-49.

Zachos, L.G. and A. Molineux, 2007, Echinoid fauna from a Late Oligocene (Chattian) reef at Damon Mound, Brazoria County, Texas, Palaeogeography, Palaeoclimatology, Palaeoecology, 243:79-91.

Zachos, L.G., C.L. Garvie, and A. Molineux, 2005, Definitive locations of Paleocene and Eocene marine fossil localities, Colorado River, Bastrop County, Texas, Texas Journal of Science, 57:4:317-328.

Zachos, L.G., 2005, Eocene dispersal of the echinoid genus Echinocyamus in the southeastern United States, Southeastern Geology, 43:4:215-227.

Zachos, L.G. and A. Molineux, 2003, Eocene echinoids of Texas, Journal of Paleontology, 77:3:491-508.

Zachos, L.G., 1993, Occurrence of the spatangid echinoid Maretia arguta (Clark) in the Middle Eocene of Texas, Journal of Paleontology, 67:1:148-150.

Zachos, L.G., 1990, Type locality designation for the Middle Eocene echinoid Fibularia texana (Twitchell), Journal of Paleontology, 64:4:659.

McKinney, M.L., K.J. McNamara and L.G. Zachos, 1990, Heterochronic hierarchies: application and theory in evolution, Historical Biology, 3:269-287.

McKinney, M.L. and L.G. Zachos, 1986, Echinoids in biostratigraphy and paleoenvironmental reconstruction: a cluster analysis from the Eocene Gulf Coast (Ocala Limestone), Palaios, 1:4:420-423.

Zachos, L.G., 1985, Lustre Field, in J.J. Tonnsen, ed., Montana Oil and Gas Fields Symposium, Montana Geological Society, Billings, 737-738.

Randazzo, A.F. and L.G. Zachos, 1983, Classification and description of dolomitic fabrics of rocks from the Floridan Aquifer, U.S.A., Sedimentary Geology, 37:1:151-162.

Zachos, L.G. and G.D. Shaak, 1978, Stratigraphic significance of the Tertiary echinoid Eupatagus ingens Zachos, Journal of Paleontology, 52:4:921-927.

Zachos, L.G., 1968, A new echinoid from the Ocala Limestone, Quarterly Journal of the Florida Academy of Sciences, 31:3:161-164.