Research Assistant Professor

Curriculum Vitae

Current Research

My interest in the Earth Sciences began as a love for the outdoors, usually manifested as some sort of adventure exploring the biology and geology of mountains, oceans, and streams. Later, I learned to make observations from the microscopic to global scale and to use these observations to better understand the past and current evolution of our planet. Radiogenic isotope geology is crucial in calibrating the absolute rates of the earth’s evolutionary processes and in seamlessly piecing together the sequence of earth history. My research interests encompass an understanding of the processes associated with the tectonic, geochemical, and thermal evolution of the continental lithosphere and mantle. In engaging these interests, I can integrate igneous and metamorphic petrology, major and trace element geochemistry, radiogenic isotope and geochronological tools, and thermal and chemical diffusive modeling to probe samples of the continental crust and underlying lithospheric mantle. The cross-disciplinary application of isotope geochemistry and geochronology is a growing field in the Earth Sciences, and in recent years, I have delved into the new and exciting subjects of historical climate records, geobiology, and archeology.


  • Google: Citation, 1034; h-index, 17; i10-index, 22
  • Research Gate: 27.09 (100% Publications)

Galli, K. G., Buchwaldt, R., Lucas Spencer G., Tanner, L. (2018).  “New CA-TIMS dates from the Brushy Basin Member, Morrison Formation, Western Colorado, USA: Implication for Rates of Sedimentation and Dinosaur Evolution.” Geological Journal 126(5): 473-486.

Keenan, T.E., Encarnación, J., Buchwald, R., Fernandez, D., Mattinson, J., Rasoazanamparany, C., Luetkemeyer, B. P. (2016). “Rapid conversion of an oceanic spreading center to a subduction zone inferred from high-precision geochronology.” PNAS 113(47): E7359-E7366.

Bradley, D., Shea, E., Buchwaldt, R., Bowring, R., Benowitz, J., O’Sullivan, P., McCauley, A. (2016). “Geochronology and Tectonic Context of Lithium-Cesium-Tantalum Pegmatites in the Appalachians.” Canadian Minerologist 54.

Bold, U., Smith, E. F., Rooneey, A. D., Bowering, S.A., Buchwaldt, R., Dudas, F. O., Ramezani, J., Crowley, J. L., Schrag, D. P., MacDonald, F. A.. (2015). “Neoproterozoic stratigraphy of Zavkhan terrane of Mongolia: The backbone for Cryogenian and Early Ediacaran chemostratigraphic records.” American Journal of Science 316: 1-63.

Jacob, K. H., Farmer, L. G., Buchwaldt, R., Bowring, S. A (2015). “Deep crustal anatexis, magma mixing, and the generation of epizonal plutons in the Southern Rocky Mountains, Colorado.” Contribution to Mineralogy and Petrology 169: 7.

Landing, E., Geyer, G., Buchwaldt, R., Bowring, S. A. (2015). “Geochronology of the Cambrian: a precise Middle Cambrian U–Pb zircon date from the German margin of West Gondwana.” Geological Magazine.

Dorais, M. J., Bothner, W. A., Buchwaldt, R. (2014). “The Appledore Island Diorite Of The Rye Complex, Coastal New Hampshire and Maine: Determining The Identity Of An Enigmatic Terrane.” Atlantic Geology 50

Kuiper, Y. D., Shields, C. D., Tubrett, M. N., Bennett, V., Buchwaldt, R. (2014). “Age and provenance of a Paleoproterozoic to Devonian Canadian Cordilleran sequence of metasedimentary rocks, Thor–Odin dome, southeastern British Columbia.” GSA Bulletin.

Hildebrand, R. S., Buchwaldt R., and Bowring, S. A (2014). “On the allochthonous nature of auriferous greenstones, Guayana shield, Venezuela.” Gondwana Research 26, 1129-1140.

Roberts, E. M., Sampson, S. D., Deino, A., Bowring, S. A., Buchwaldt, R. (2013).  “The Kaiparowits Formation: a remarkable record of Late Cretaceous terrestrial environments, ecosystems and evolution in Western North America.” In  A. L. Titus and M. A. Loewen, eds., At the Top of the Grand Staircase: The Late Cretaceous in Utah. Bloomington: Indiana University Press: 85-106.

Bookhagen, B., McLean, N., Buchwaldt, R., Rioux, M., Dudas, F., Bowring, S. (2013). “EARTHTIME: Teaching geochronology to high school students in the US.” In Tong, V. C. H., ed., Geoscience Research and Education: Teaching at Universities. Springer, Dordrecht: 171-189.

Losiak, A., Schulz, T., Buchwaldt, R., Koeberl, C. (2013). “Characteristics of granitic intrusions from the vicinity of the Bosumtwi impact crater, Ghana.” Lithos 177: 297–313.

Powerman, V., Shatsillo, A., Coe, R., Zhao, X., Gladkochub, D., Buchwaldt, R., Pavlov, V. (2013). “Palaeogeography of the Siberian platform during middle Palaeozoic (ca. 450-400 Ma): new palaeomagnetic evidence from Lena and Nyuya rivers.” Geophysical Journal International 194: 1412-1440.

Buchwaldt, R. (2013). “Pyroclastic Flows.” In Bobrowsky, P. Encyclopedia of Natural Hazards, Springer, Dordrecht: 791-796.

Buchwaldt, R. (2013). “Pahoehoe Lava.” In Bobrowsky, P. Encyclopedia of Natural Hazards, Springer, Dordrecht: 748.

Buchwaldt, R. (2013). “Aa Lava.” In Bobrowsky, P. Encyclopedia of Natural Hazards, Springer, Dordrecht: 1.

.Buchwaldt, R. (2013). “Lava.” In Bobrowsky, P. Encyclopedia of Natural Hazards, Springer, Dordrecht: 623-624.

Mechor, R., Buchwaldt, R., Bowring, S. A. (2013). “Late Triassic bird-like tracks reported from northwest Argentina are now considered of Late Eocene age on the basis of a new date of a tuff bed of the sedimentary succession containing the fossil tracks.” Nature 495: E1-E2.

Cosentino, D., Buchwaldt, R., Sampalmieri, G., Iadanza, A., Cipollari, P., Schildgen, T. F., Hinnov, L., Ramezani, J., Bowring, S. A. (2013). “Refining the Mediterranean “Messinian gap” with high-precision U-Pb zircon geochronology, central and northern Italy.” Geology 41: 323-326.

Schildgen, T. F., Cosentino, D., Caruso, A., Buchwaldt, R., Yıldırım, Y., Bowring, S. A., Rojay, B., Echtler, H., Strecker, M. R. (2012). “Surface expression of Eastern Mediterranean slab dynamics: Neogene topographic and structural evolution of the SW margin of the Central Anatolian Plateau, Turkey.” Tectonics 31: TC2005.

Thomson, S. N., Gehrels, G. E., Ruiz, J., Buchwaldt, R. (2012). “Routine U-Pb dating of apatite using laser-ablation-multicollector-ICPMS.” Geochemistry, Geophysics, Geosystems 13: Q0AA21.

Thompson, C. K., Kah, L. C., Astini, R., Bowring, S. A., Buchwaldt, R. (2012). “Bentonite Geochronology, Marine Geochemistry, and the Great Ordovician Biodiversification Event (GOBE).” Palaeogeography, Palaeoclimatology, Palaeoecology 321-322, 88-101.

Hoffman, P. F., Bowring, S. A., Buchwaldt, R., Hildebrand, R. S. (2011). “Birthdate for the Coronation paleocean: age of initial rifting in Wopmay orogen, Canada.” Canadian Journal of Earth Sciences 48: 281–293.

Owens, B. E., Buchwaldt, R., Shirvell, C. R. (2010). “Geochemical and geochronological evidence for Devonian magmatism revealed in the Maidens gneiss, Goochland terrane, Virginia.” Geological Society of America Memoirs 206: 725-738.

Buchwaldt, R., Toulkeridis, T., Ucakuwun, E., Todt, W. (2008). “Crustal age Domains in the Kiberan Belt of SW-Uganda: Combined Zircon geochronology and Sm-Nd isotopic investigation.” Journal of African Earth Sciences 51: 4-20.

Tucker R. D., Kusky T. M., Buchwaldt R., and Handke M. J. (2007). “Neoproterozoic nappes and superposed folding of the Itremo Group, west-central Madagascar.” Gondwana Research 12(4): 356-379,.

Toulkeridis T., Buchwaldt R., Addison A. (2007). “When Volcanoes Threaten, Scientists Warn.” Geotimes 52(11): 36-39.

Buchwaldt, R. and Thornhill, R. (2006). “Symmetry of faces and sexual attractiveness: The Mathematical background, a Mineralogical approach.” Psychology Today 3, 62-65.

Ring, U., Buchwaldt, R., Gessner, K. (2004). “Pb/Pb dating of garnet from the Anatolide belt in western Turkey: Pan-African metamorphism related to the collision of Angara with Gondwana.” Zeitschrift Deutsche Geologische Gesellschaft 154: 537-555.

Buchwaldt R., Tucker, R. D., Dymek, R. F. (2004). “Geothermobarometry and U-Pb Geochronology of metapelitic granulites and pelitic migmatites from the Lokoho region, Northern Madagascar.” American Mineralogist 88: 1751-1764.

Ring, U., Kröner, A., Buchwaldt, R., Toulkeridis, T., Layer, P. (2002). “Shear-zone patterns and eclogite-facies metamorphism in the Mozambique belt of northern Malawi, eastern-central Africa: implications for the assembly of Gondwana.” Precambrian Research 116: 19-56.

Oliver, G. J. H., Chen, F., Buchwaldt, R., Hegner, E. (2000). “Fast tectonometamorphism and exhumation in the type area of the Barrovian and Buchan zones.” Geology 28, 459-462.

Buchwaldt, R., Toulkeridis, T., Babinski, M., Noce, C. M., Martins Neto, M., Hercos, C. M. (1999). “Age determination and age related Provenance Analysis of the Proterozoic glaciation in central eastern Brazil.” An. Acad. Ci. 71(3): 527-548.

Ring, U., Kröner, A., Layer, P., Buchwaldt, R., Toulkeridis, T. (1999). “Deformed A-type granites in northern Malawi, east-central Africa: Pre- or syntectonic?” Journal of the Geological Society of London 156: 695-714.