1. An assessment of sanidine from the Fire Clay tonstein as a Carboniferous 40Ar/39Ar monitor standard and for inter-method comparison to U-Pb zircon geochronology Machlus, Malka L.; Shea, Erin K.; Hemming, Sidney R.; Ramezani, Jahandar; Rasbury, E. Troy 2020 Articles GeochemistryGeological timeRadioisotopes in geologyTonsteinsPaleozoic Geologic Period
2. A strategy for cross-calibrating U–Pb chronology and astrochronology of sedimentary sequences: An example from the Green River Formation, Wyoming, USA Machlus, Malka L.; Ramezani, Jahandar; Bowring, Samuel A.; Hemming, Sidney R.; Tsukui, Kaori; Clyde, William C. 2015 Articles GeologyGeological timeUranium-lead datingCyclostratigraphyEocene Geologic EpochZircon