Data files used to plot Figures 1-6, Supplemental Figures 1 and 2 in Cottrell et al 2023, "No Late Cretaceous true polar wander oscillation and implications for stability of Earth relative to the rotation axis"

Also saved as Readme.txt <br> SupplTable1_June2023.xlsx: Supplementary Table 1: Directional data as reported by Mitchell et al 2021. This table has been filtered for repeated samples, and data not made available from the original data source. Column Headings: Section, stratigraphic section; Sample Name, sample identification of Mitchell et al 2021; Bin Age (Ma), age assigned by Mitchell et al 2021; Age (Ma), age of samples as reported by Mitchell et al 2021; GDec (o), GINc (o), Geographic Directions as reported by Mitchell et al 2021; SDec (o), SInc (o), stratigraphic directions as reported by Mitchell et al 2021; SPDec (o), SPInc (o), stratigraphic directions reported as northern hemisphere directions by Mitchell et al 2021. SupplTable2_June2023.xlsx: Supplementary Table 2: 1 million year binned average directions and poles for Apiro and Furlo sections. Section, Stratigraphic section; Age (Ma), binned ages from Suppl. Table 1; dec (o) and inc (o), Fisher directions of age bins; n, number of individual directions in each bin; alpha95 (o), circle of confidence radius for Fisher Means; Plon (o), Plat (o), A95 (o), poles calculated from directions in Suppl. Table 1 using section locations as reported in Mitchell et al 2021, binned and averaged and presented here. These poles are used for Supplementary Figures 1 and 2 in the Cottrell et al 2023 manuscript. Figure1data.xlsx: Table of published paleomagnetic poles as presented in Mitchell et al 2021. The published age bin (included for comparison) is corrected in the last column for bin age assignment based on data provided in the Mitchell et al 2021 publication. This data set forms the basis of Figure 1 in Cottrell et al 2023 manuscript. Figure2data.xlsx: Excel file of select data columns of two samples (C10AD253 and C10AD268) presented as reverse and normal polarity examples from the data set of Mitchell et al 2021. Each file is presented on a separate tab in a format compatible with MagIC database format. Original data can be downloaded via the link provided in Mitchell et al 2021. Original data files were filtered using python and bash scripts to select demagnetization step, magnetization moment, and stratigraphic corrected directions. Column headings Sample: sample name Demag Step (oC) - demagnetization step in degrees C Moment (emu) - Magnetization moment in electromagnetic units SDec (o) - declination corrected for geographic direction and strike/bedding dip SInc (o) - inclination corrected for geographic direction and strike/bedding dip Figure3data.zip: Zipped folder of hysteresis data presented in Figure 3 of Cottrell et al 2023. Data were collected on a Princeton Measurements Alternating Gradient Force Magnetometer Model 2900 with a P1 probe. The probe and diamagnetic/paramagnetic adjusted hysteresis data file and first order reversal curve files for each sample are provided. The PDF and text output of forcsensei (publically available python code for evaluating first order reversal curves) are also provided. Figure4data.xlsx: Excel file of data presented in Figure 4. The original demagnetization data files can be found in the link provided in Mitchell et al 2021. Magnetization moment of ~580 degrees C of each data file (580 degrees specifically was not always used as a demagnetization step by the original authors) was used to calculate the percent natural remanent magnetization remaining as normalized by the zero demagnetization step magnetization moment. Any sample line designated excursion or transition was removed from the analysis. Samples were grouped based on Chron designation into Normal (32n, 33n, 34n) or Reverse (32r, 33r). Histograms of % NRM remaining after demagnetization to 580 degrees were plotted in Figure 4. Figure5data.xlsx: Data file for plotting Figure 5. Originally presented in Mitchell et al 2021, and filtered for repeated data lines and files not made available for download. See Supplementary Data Table 1 for full details. Column headings Section - sedimentary section Sample Name - sample designation assigned by Mitchell et al 2021 Bin Age - Bin Age in millions of years as assigned by Mitchell et al 2021 Age - Age in millions of years as determined by Mitchell et al 2021 Chron - Chron assignment as determined by Mitchell et al 2021 SDec - Stratigraphic declination as presented by Mitchell et al 2021 SInc - Stratigraphic inclination as presented by Mitchell et al 2021 NRMleft580 - percent NRM remaining after demagnetization to ~580 degrees. See Methods in Cottrell et al 2023 for details. Figure6data.xlsx: Excel data file of filtered directional data presented in Mitchell et al 2021. Characteristic remanent magnetization directions and Low temperature component fits as presented in Mitchell et al 2021, and filtered for excluded data lines, repeated measurement lines, and only for the Apiro sedimentary section. Chron 33r and 33n data are presented in separate tabs. Column headings: Section - sedimentary section Sample Name - sample name as presented in Mitchell et al 2021 Bin Age - as presented in Mitchell et al 2021 Age - as presented in Mitchell et al 2021 Chron - chron assignment as presented in Mitchell et al 2021 GDec - geographic declination direction of the characteristic remanent magnetization, as presented in Mitchell et al 2021 GInc - geographic inclination direction of the characteristic remanent magnetizartion, as presented in Mitchell et al 2021 NRMleft580 - percent natural remanent magnetization remaining aftyer demagnetization to ~580 degrees LTGDec - low temperature geographic declination direction as presented by Mitchell et al 2021 LTGInc - low temperature geographic inclination direction as presented by Mitchell et al 2021 <br> <br> Figure 7 is a statistical model based on input parameters; there is no data associated with it.

本数据集同时保存为Readme.txt<br>SupplTable1_June2023.xlsx：补充表1：Mitchell等人2021年报道的定向数据。本表已过滤重复样本，并移除了原始数据源未公开的数据。列标题说明：Section（地层剖面）：地层剖面；Sample Name（样本标识）：Mitchell等人2021研究中的样本编号；Bin Age (Ma)（分箱年龄，单位：百万年）：Mitchell等人2021年给定的年龄；Age (Ma)（样本年龄，单位：百万年）：Mitchell等人2021年报道的样本年龄；GDec (°)、GInc (°)（地理方向）：Mitchell等人2021年报道的地理方向；SDec (°)、SInc (°)（地层方向）：Mitchell等人2021年报道的地层方向；SPDec (°)、SPInc (°)（北半球标准化地层方向）：Mitchell等人2021年以北半球方向形式报道的地层方向。<br>SupplTable2_June2023.xlsx：补充表2：Apiro与Furlo剖面的1百万年分箱平均方向及古地磁极（paleomagnetic poles）。列标题说明：Section（地层剖面）：地层剖面；Age (Ma)（分箱年龄，单位：百万年）：来自补充表1的分箱年龄；dec (°)与inc (°)（费舍尔方向）：年龄分箱的费舍尔方向；n（样本量）：每个分箱内的单个方向数量；alpha95 (°)（置信半径）：费舍尔均值的置信圆半径；Plon (°)、Plat (°)、A95 (°)：基于Mitchell等人2021年报道的剖面位置，由补充表1中的方向计算得到的古地磁极，经分箱平均后呈现于此。这些极值用于Cottrell等人2023年论文的补充图1与补充图2。<br>Figure1data.xlsx：Mitchell等人2021年发表的古地磁极数据表。为便于对比而保留的已发表年龄分箱，已在最后一列根据Mitchell等人2021年论文中的数据修正了分箱年龄赋值。本数据集为Cottrell等人2023年论文图1的基础数据。<br>Figure2data.xlsx：包含两个样本（C10AD253与C10AD268）选定数据列的Excel文件，该样本集取自Mitchell等人2021年的研究，作为反向与正向极性的示例。每个文件以独立工作表形式存储，格式兼容MagIC数据库（MagIC database）。原始数据可通过Mitchell等人2021年论文中提供的链接下载。原始数据文件通过Python与Bash脚本过滤，选取了退磁步骤、磁化强度矩以及经地层校正的方向。列标题说明：Sample（样本名称）：样本名；Demag Step (°C)（退磁步骤，单位：摄氏度）：以摄氏度表示的退磁步骤；Moment (emu)（磁化强度矩，单位：电磁单位）：以电磁单位计量的磁化强度矩；SDec (°)（经校正的地层偏角）：经地理方向与走向/层理倾角校正的地层偏角；SInc (°)（经校正的地层倾角）：经地理方向与走向/层理倾角校正的地层倾角。<br>Figure3data.zip：Cottrell等人2023年论文图3所示的磁滞数据压缩包。数据采用Princeton Measurements公司生产的型号2900交变梯度力磁强计搭配P1探头采集。随文件提供了每个样本的探头及经抗磁/顺磁校正的磁滞数据文件，以及一阶反转曲线（first order reversal curve, FORC）文件。同时提供了forcsensei（一款公开可用的一阶反转曲线分析Python代码）的PDF与文本输出结果。<br>Figure4data.xlsx：Cottrell等人2023年论文图4所用数据的Excel文件。原始退磁数据文件可通过Mitchell等人2021年论文提供的链接获取。本研究以每个数据文件在~580℃时的磁化强度矩（原始作者并非始终将580℃作为退磁步骤），以零退磁步骤的磁化强度矩为基准，计算了剩余天然剩余磁化强度（natural remanent magnetization, NRM）百分比。本分析移除了所有标记为偏移或过渡的样本。样本按地磁年代（Chron）划分为正向极性组（32n、33n、34n）与反向极性组（32r、33r）。图4绘制了经580℃退磁后剩余NRM百分比的直方图。<br>Figure5data.xlsx：用于绘制Cottrell等人2023年论文图5的数据文件。该数据最初发表于Mitchell等人2021年的研究，已过滤重复数据行与未公开下载的文件。完整细节见补充数据表格1。列标题说明：Section（沉积剖面）：沉积剖面；Sample Name（样本编号）：Mitchell等人2021年给定的样本标识；Bin Age（分箱年龄，单位：百万年）：Mitchell等人2021年给定的分箱年龄；Age（样本年龄，单位：百万年）：Mitchell等人2021年测定的样本年龄；Chron（地磁年代）：Mitchell等人2021年确定的地磁年代赋值；SDec（地层偏角）：Mitchell等人2021年报道的地层偏角；SInc（地层倾角）：Mitchell等人2021年报道的地层倾角；NRMleft580（580℃退磁后剩余NRM百分比）：经~580℃退磁后剩余的天然剩余磁化强度百分比。详细方法见Cottrell等人2023年论文的方法部分。<br>Figure6data.xlsx：经过滤的Mitchell等人2021年定向数据Excel文件。包含Mitchell等人2021年报道的特征剩磁方向与低温组分拟合结果，已过滤掉排除的数据行、重复测量行，且仅包含Apiro沉积剖面的数据。Chron 33r与33n的数据分别存储于不同工作表。列标题说明：Section（沉积剖面）：沉积剖面；Sample Name（样本名称）：Mitchell等人2021年报道的样本名；Bin Age（分箱年龄）：Mitchell等人2021年报道的分箱年龄；Age（样本年龄）：Mitchell等人2021年报道的样本年龄；Chron（地磁年代）：Mitchell等人2021年报道的地磁年代赋值；GDec（特征剩磁地理偏角）：Mitchell等人2021年报道的特征剩磁地理偏角；GInc（特征剩磁地理倾角）：Mitchell等人2021年报道的特征剩磁地理倾角；NRMleft580（580℃退磁后剩余NRM百分比）：经~580℃退磁后剩余的天然剩余磁化强度百分比；LTGDec（低温组分地理偏角）：Mitchell等人2021年报道的低温组分地理偏角；LTGInc（低温组分地理倾角）：Mitchell等人2021年报道的低温组分地理倾角。<br><br>图7为基于输入参数构建的统计模型，无关联配套数据。