Potential GSSP of the Global Kungurian Stage: Trapper Creek, Cassia Mountains, southern Idaho and Rockland, Pequop Mountains, northern Nevada.

全球昆古里安阶段的潜在GSSP：爱达荷州南部的Trapper Creek、Cassia Mountains和内华达州北部的Rockland、Pequop Mountains。摘要国际地层学委员会（ICS）完成全球时间标度具有重要和紧迫的意义。在所有阶段都有定义之前，时间尺度无法用放射性年龄日期充分校准。如果没有一个可靠的、经过校准的时间尺度，研究大量涉及深时地质记录的古气候、古生物学和其他问题的努力将受到限制。国际地层学委员会将2012年定为确定所有阶段的最后期限，而完成这项工作的时间已经不多了。申请的资金将支持对两个剖面（爱达荷州南部Cassia山脉的Trapper Creek和内华达州北部Pequop山脉的Rockland）进行实地和实验室研究，这两个剖面最近被提议作为最有希望建立GSSP的剖面，以确定全球年代地层尺度中Kungurian阶段的基础。Trapper Creek和Rockland是目前已知的唯一容易接近的部分，在那里乌拉利亚、北美和特提斯牙形石动物共同出现，从而提供了全球相关性，也是唯一已经获得相当多同位素结果的部分。罗克兰剖面已经测量过了，但pi将以厘米尺度重新测量两个剖面的过渡层。另外的同位素研究将在博伊西州立大学的地质年代学和地球化学实验室进行。世界牙形石专家团队致力于完成这一项目，并将其作为优先事项。

Potential GSSP of the Global Kungurian Stage: Trapper Creek, Cassia Mountains, southern Idaho and Rockland, Pequop Mountains, northern Nevada.Vladimir Davydov and Mark D. Schmitz, Boise State UniversityEAR-1004079 ABSTRACTThe completion of the global time scale by the International Commission on Stratigraphy (ICS) is of paramount and pressing importance. Until there are definitions for all stages, the time scale cannot be adequately calibrated with radiometric age dates. Without a reliable and calibrated time scale, efforts to study a host of paleoclimate and paleobiologic and other issues that involve the deep-time geologic record will be limited. The International Commission of Stratigraphy has set 2012 as the deadline for all stages to be defined - and time is running short to get the job done. The requested funds will support a field and lab study of two sections, (Trapper Creek, Cassia Mountains, southern Idaho, and Rockland, Pequop Mountains, northern Nevada), which were proposed recently as the most promising sections to establish a GSSP to define the base of the Kungurian Stage in the Global Chronostratigraphic Scale. Trapper Creek and Rockland are the only easily accessible sections known at the moment where Uralian, N. American and Tethyan conodont faunas co-occur and thus provide global correlation and the only sections where considerable isotopic results are already available. Rockland section is already measured, but PIs will re-measure the transitional beds in both sections at centimeter scale. Additional isotope studies will be performed at geochronology and geochemistry labs in Boise State University. The team of world conodont and fusulinid experts is committed to complete this project as a high priority.