Articles
Neoarchean Paleoweathering of Tonalite and Metabasalt: Implications for Reconstructions of 2.69 Ga Early Terrestrial Ecosystems and Paleoatmospheric Chemistry (with Steven G. Driese, Mark A. Jirsa, Minghua Ren, Susan L. Brantley, Nathan D. Sheldon, and Don Parker), Precambrian Research (2011)
Field and laboratory investigations of a 2690.83 Ma (207Pb/206Pb age of Saganaga Tonalite) unconformity exposed...
Sm–Nd Isotope Systematics by Laser Ablation-Multicollector-Inductively Coupled Plasma Mass Spectrometry: Methods and Potential Natural and Synthetic Reference Materials (with Christopher M. Fisher, Christopher R.M. McFarlane, John M. Hanchar, Paul J. Sylvester, Rebecca Lam, and Henry P. Longerich), Chemical Geology (2011)
An improved method for precise and accurate in situ determination of Sm–Nd isotopes, with high...
High-Precision U-Pb Calibration of Carboniferous Glaciation and Climate History, Paganzo Group, NW Argentina (with E. L. Gulbranson, I. P. Montañez, C. O. Limarino, J. L. Isbell, S. A. Marenssi, and James L. Crowley), Geological Society of America Bulletin (2010)
The duration and geographic extent of Carboniferous glacial events in southern Gondwana remain poorly...
Mesozoic Magmatism and Deformation in the Northern Owyhee Mountains, Idaho: Implications for Along-Zone Variations for the Western Idaho Shear Zone (with B. Benford, James Crowley, Clyde J. Northrup, and B. Tikoff), Lithosphere (2010)
The northern Owyhee Mountains of southwestern Idaho contain granitoid rocks that are the same age...
Calibrating the Cryogenian (with Francis A. Macdonald, James L. Crowley, Charles F. Roots, David S. Jones, Adam C. Maloof, Justin V. Strauss, Phoebe A. Cohen, David T. Johnston, and Daniel P. Schrag), Science (2010)
The Neoproterozoic was an era of great environmental and biological change, but a paucity of...
High-precision U-Pb Zircon Age Calibration of the Global Carboniferous Time Scale and Milankovitch Band Cyclicity in the Donets Basin, Eastern Ukraine (with Vladimir I. Davydov, James L. Crowley, and Vladislav I. Poletaev), Geochemistry Geophysics Geosystems (2010)
High-precision ID-TIMS U-Pb zircon ages for 12 interstratified tuffs and tonsteins are used to radiometrically...
Ecological Persistence in the Late Mississippian (Serpukhovian, Namurian A) Megafloral Record of the Upper Silesian Basin, Czech Republic (with Robert A. Gastaldo, Eva Purkynová, and Zbynek Simůnek), Palaios (2009)
The Serpukhovian (Namurian A) stratigraphy of the Ostrava Formation, Upper Silesian Coal Basin, Czech Republic,...
Derivation of Isotope Ratios, Errors, and Error Correlations for U-Pb Geochronology Using 205Pb-235U-(233U)-spiked Isotope Dilution Thermal Ionization Mass Spectrometric Data, Geochemistry Geophysics Geosystems (2007)
A comprehensive treatment of the derivation of U-Pb isotope ratios and their corresponding uncertainties from...