Precise Age Calibration of the Late Pennsylvanian - Early Permian Time Scale: Implications for Global Correlation and Rates of Processes in the Late Paleozoic Era

宾夕法尼亚晚期-早二叠世时间尺度的精确年龄刻度：对全球对比和晚古生代EraClyde Norhorup过程速率的影响EraClyde Norhorup，V.Davydov，Walter SnyderEAR-0106796地质时间尺度是地球科学研究的基本工具-全球事件对比，绝对年龄的确定和过程速率的估计都取决于时间尺度的准确性和精确度。该项目将通过U-Pb锆石年代学、地层学和多分类群古生物学的组合来标定宾夕法尼亚晚期到早二叠世的时间尺度。工作重点将放在俄罗斯-哈萨克斯坦南部乌拉尔山脉前陆的海相沉积剖面上，这一地区提供了一个绝佳的时间刻度校准机会，因为晚古生代岩石除了有许多可以进行辐射测年的层间火山灰层外，还有大量保存完好的化石。

ABSTRACTPrecise Age Calibration of the Late Pennsylvanian-Early Permian Time Scale: Implications for Global Correlation and Rates of Processes in the Late Paleozoic EraClyde Northrup, V. Davydov, Walter SnyderEAR-0106796The geologic time scale is a fundamental tool in Earth Science research - correlation of events globally, determination of absolute ages, and the estimation of rates of process all depend on the accuracy and precision of the time scale. This project will calibrate the Late Pennsylvanian through early Permian interval of the time scale through a combination of U-Pb zircon geochronology, stratigraphy, and multitaxa paleontology. Work will focus on the marine sedimentary sections in the foreland of the southern Ural mountains in Russia-Kazakhstan, an area that offers a fantastic opportunity for time scale calibration because the late Paleozoic rocks have numerous, well-preserved fossils in addition to many interstratified volcanic ash horizons that are amenable to radiometric dating.