Two apparent polar wander (APWP) paths for North America (NA) diverge during the Jurassic. The path based on paleomagnetic results from igneous rocks of eastern NA, well-dated Ontario kimberlites, and carbonates and radiolarites of Adria (northern Italy - transformed to NA coordinates) has a large gap at high latitude, which could document rapid plate motion or True Polar Wander. The APWP from coeval NA sedimentary rocks define a lower-latitude, more continuous path. The discrepancy between the two paths has been attributed to inclination error (IE) from deposition and compaction of the sediments.

New paleomagnetic results from Upper Triassic (Garita Creek, Trujillo, and Redonda Formations) and Middle Jurassic (Entrada, Summerville, and Lower Morrison Formations) sedimentary units of east-central New Mexico have positive reversal and fold tests, which indicate their magnetization, mostly carried by detrital hematite, is primary. Interpretation of noisy and non-linear demagnetization paths was facilitated by a smoothing scheme, which did not bias the mean directions. Using the sample-level directions from line fits, IE was estimated ~20° for the Jurassic units, and it is negligible for the Triassic units because mean directions are horizontal. Mean paleomagnetic poles for the ~223 Ma (Garita Creek and Trujillo) and ~214 Ma Redonda Formations are 55.7°N/78.7°E/A95 = 3.2° and 59.7°N/81.0°E/A95 = 4.0°; those for the ~163 Ma Summerville and ~155 Ma Morrison Formations are 59.3°N/138.1°E/A95 = 6.5° and 48.7°N/151.8°E/A95 = 7.8°.

Simulated ~163 Ma paleomagnetic poles based on Summerville results and a wide range of IE show that no amount of IE correction to the Summerville directions would produce poles consistent with the high-latitude Jurassic APWP. Furthermore, paleomagnetic poles for Trujillo, Redonda, Summerville, and Lower Morrison Formations of east-central New Mexico, even with IE-correction, streak approximately along the 60° parallel (present coordinates) for most of late Triassic and Jurassic, which validates the lower-latitude APWP. Another explanation for the APWP discrepancy is required.

在侏罗纪期间，北美（NA）的两条明显的极地漂移（APWP）路径分叉。基于北半球东部火成岩，日期合适的安大略金伯利岩以及阿德里亚（意大利北部-转换为北半球坐标）的碳酸盐和放射性岩的古磁结果所形成的路径在高纬度上具有较大的间隙，这可以证明板块快速运动或真实极地漫游。同期NA沉积岩的APWP定义了一条较低纬度，更连续的路径。两条路径之间的差异已归因于沉积物沉积和压实引起的倾斜误差（IE）。

新墨西哥州中东部上三叠统（加里塔河，特鲁希略和雷东达组）和中侏罗统（恩特拉达，萨默维尔和下莫里森组）的新古磁结果具有正反转和褶皱试验，表明它们的磁化强度主要是由碎屑赤铁矿携带，是主要的。平滑方案有助于噪声和非线性退磁路径的解释，该方案不会偏向平均方向。使用线拟合的样本水平方向，侏罗纪单位的IE约为20°，而三叠纪单位的IE可以忽略不计，因为平均方向是水平的。〜223 Ma（Garita Creek和Trujillo）和〜214 Ma Redonda地层的平均古磁极为55.7°N / 78.7°E / A95 = 3.2°和59.7°N / 81.0°E / A95 = 4.0°;

根据萨默维尔结果和大范围的IE模拟了约163 Ma的古磁极，表明对萨默维尔方向的IE校正量不会产生与高纬度侏罗纪APWP一致的磁极。此外，即使经过IE校正，新墨西哥州中东部特鲁希略，雷东达达，萨默维尔和下莫里森地层的古磁极，即使在三叠纪和侏罗纪晚期，也都沿60°平行线（当前坐标）成条纹状，这证实了低纬度APWP。需要针对APWP差异的另一种解释。