The Sheep Mountain‐Little Sheep Mountain Anticlines, Bighorn Basin (USA) formed as basement‐cored Laramide structures in the formerly undeformed foreland of the thin‐skinned Sevier orogen. We take advantage of the well‐constrained microstructural network there to reconstruct differential stress magnitudes that prevailed during both Sevier and Laramide layer‐parallel shortening (LPS), before the onset of large‐scale folding. Differential stress magnitudes determined from tectonic stylolites are compared and combined to previous stress estimates from calcite twinning paleopiezometry in the same formations. During stress loading related to LPS, differential stress magnitudes transmitted from the distant Sevier thin‐skinned orogen into the sedimentary cover of the Bighorn basin (11–43 MPa) are higher than the differential stress magnitudes accompanying the early stage of LPS related to the thick‐skinned Laramide deformation (2–19 MPa). This study illustrates that the tectonic style of an orogen affects the transmission of early orogenic stress into the stable continental interior.

中文翻译：

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前陆的应力传递是否取决于结构样式？美国比格霍恩盆地 Sevier 薄皮层和 Laramide 厚皮层平行缩短过程中独特的应力大小，由缝合线和方解石孪晶古测压法揭示

绵羊山-小绵羊山背斜，比格霍恩盆地（美国）在薄皮 Sevier 造山带原先未变形的前陆形成了基底为芯的 Laramide 构造。我们利用那里受良好约束的微结构网络来重建在大规模折叠开始之前在 Sevier 和 Laramide 层平行缩短（LPS）期间普遍存在的差异应力大小。将由构造缝合线确定的差异应力大小与先前在相同地层中方解石孪晶古压力测量法得出的应力估计值进行比较和组合。在与 LPS 相关的应力加载期间，从遥远的 Sevier 薄皮造山带传递到 Bighorn 盆地沉积盖层的差异应力大小（11-43 MPa）高于与厚皮 Laramide 变形相关的 LPS 早期阶段伴随的差异应力大小（2-43 MPa）。 19 兆帕）。这项研究表明，造山带的构造样式会影响早期造山应力向稳定的大陆内部的传递。