A growing body of work from upper Paleozoic records along the western margin of Laurentia has shown that the margin was subjected to ongoing deformation from at least Late Devonian through early Permian (Cisuralian) time. However, the geographic extent of this deformation and its effect on basin subsidence along the western Laurentian margin remains poorly constrained. Here, we present geologic mapping, detailed sedimentologic analysis, detrital zircon U-Pb data, and fusulinid and conodont biostratigraphy from a section of virtually unstudied lower Permian to Permian-Triassic sedimentary rocks currently exposed in the Monitor Range of central Nevada. These data suggest (1) coarse-grained sedimentation adjacent to uplifted topography from earliest Permian through earliest Triassic time, (2) early-middle Permian sedimentation that started as deposition of proximal limestone boulders and cobbles and transitioned to a system dominated by far-traveled aeolian sand, and (3) that strata preserved in the Monitor Range record possible wedgetop sedimentation associated with the Permian-Triassic Sonoma Orogeny.

来自劳伦西亚西部边缘的上古生代记录的越来越多的工作表明，至少从晚泥盆世到早二叠世（Cisuralian），该边缘经历了持续的变形。然而，这种变形的地理范围及其对西劳伦斯边缘盆地沉降的影响仍然缺乏约束。在这里，我们展示了地质绘图、详细的沉积学分析、碎屑锆石 U-Pb 数据，以及目前在内华达州中部监测范围内暴露的一段几乎未研究的下二叠纪到二叠纪-三叠纪沉积岩的断屑岩和牙形石生物地层学。这些数据表明 (1) 与从最早的二叠纪到最早的三叠纪时期的抬升地形相邻的粗粒沉积，