The Magnetic Stratigraphy of the Middle Carboniferous

对加拿大科罗拉多州和新不伦瑞克州石炭系沉积物的调查表明，石炭-二叠纪反转超新统(PCRS)的下界年龄为Morrowan。在马林古因半岛上密西西比和宾夕法尼亚最下部确定了一个反转序列，50%是正常的和反转的。这项研究将把这一序列向上延伸，以便明确地确定PCRS的下限，并将该序列与宾夕法尼亚州、亚利桑那州和内华达州类似的年龄沉积物相关联。这项研究将用绝对年代学校准生物地层分带，从而提高我们测定上古生代事件的能力。

Investigations of Carboniferous sediments in Colorado and New Brunswick Canada have constrained the age of the lower boundary of the Permo-Carboniferous Reversed Superchron (PCRS) to be Morrowan in age. A reversal sequence has been determined from Upper Mississippian and Lowermost Pennsylvanian of the Maringuoin Peninsula which is 50% normal and reversed. This research will extend this sequence upward so as to determine unambiguously the lower limit of the PCRS and to correlate this sequence to similar age sediments in Pennsylvania, Arizona and Nevada. This research will calibrate biostratigraphic zonations with an absolute chronology and thus improve our ability to date upper Paleozoic events.