{ "metadata": { "name": "", "signature": "sha256:7738873759cfd7e8f686a03c823f88e733ada3dafa395978a3631e114beb6538" }, "nbformat": 3, "nbformat_minor": 0, "worksheets": [ { "cells": [ { "cell_type": "markdown", "metadata": {}, "source": [ "# Analysis of Simpson Island paleomagnetic data" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "Corresponding Author: Nicholas L. Swanson-Hysell (swanson-hysell@berkeley.edu)" ] }, { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Introduction" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "This IPython notebook contains data analysis on paleomagnetic data developed from ca. 1.1 billion year old lava flows of the Osler Volcanic Group that are part of the North American Midcontinent Rift as well as supporting analyses on other data sets. These analyses accompany a **Geochemistry, Geophysics, Geosystems** manuscript entitled \"Confirmation of progressive plate motion during the Midcontinent Rift's early magmatic stage from the Osler Volcanic Group, Ontario, Canada\" by N. L. Swanson-Hysell, A. A. Vaughan, M. R. Mustain and K. Asp. This notebook is part of the supporting online materials and is available at [https://github.com/Swanson-Hysell/2014_Swanson-Hysell-et-al_Osler](https://github.com/Swanson-Hysell/2014_Swanson-Hysell-et-al_Osler) along with the necessary files to execute all of the code. Within this github repository are the following folders:\n", "\n", "1. [2014_Osler_Code](https://github.com/Swanson-Hysell/2014_Swanson-Hysell-et-al_Osler/tree/master/2014_Osler_Code) This folder contains this notebook file as well as necessary libraries.\n", "2. [2014_Osler_Data](https://github.com/Swanson-Hysell/2014_Swanson-Hysell-et-al_Osler/tree/master/2014_Osler_Data) This folder contains the data generated in the study at the specimen level as well as the flow means that are imported into this notebook for data analysis.\n", "3. [2014_Osler_Manuscript](https://github.com/Swanson-Hysell/2014_Swanson-Hysell-et-al_Osler/tree/master/2014_Osler_Manuscript) This folder contains the manuscript text and figures.\n", "\n", "If you are viewing this supporting material as a PDF document and want to run the code in the notebook you will need to download the code from the github repository and you will also need a Python distribution that includes IPython. There are good instructions for installing IPython here: http://ipython.org/install.html. Alternatively you can view the notebook online with the IPython nbviewer at this link: http://bit.ly/19XRdjJ" ] }, { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Import libraries" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "This code blocks imports necessary libraries that define functions that will be used in the data analysis below. The code below uses the pmag.py and pmagplotlib.py files of the the PmagPy software package (version pmagpy-2.206) authored by Lisa Tauxe (https://github.com/ltauxe/PmagPy). The check_updates and get_version functions of the PmagPy libraries cause errors in the interactive environment of IPython so the code below calls a slightly modified version of those libraries that is included in the Github repository for this work. There are other functions that are necessary for the interactive plotting of paleomagnetic data (some of them edited from PmagPy) that are within the IPmag.py library that is imported in the code block below." ] }, { "cell_type": "code", "collapsed": false, "input": [ "#import paleomagnetic specific libraries\n", "import pmag, pmagplotlib, IPmag\n", "import pandas\n", "pandas.set_option('display.max_columns', 500)\n", "from IPython.core.display import HTML\n", "from mpl_toolkits.basemap import Basemap" ], "language": "python", "metadata": {}, "outputs": [], "prompt_number": 1 }, { "cell_type": "markdown", "metadata": {}, "source": [ "This notebook runs with pylab inline which imports the numpy, scipy and matplotlib functions and allows for the plots to be viewed inline in the IPython notebook (instead of opening up in another window). " ] }, { "cell_type": "code", "collapsed": false, "input": [ "%pylab inline" ], "language": "python", "metadata": {}, "outputs": [ { "output_type": "stream", "stream": "stdout", "text": [ "Populating the interactive namespace from numpy and matplotlib\n" ] } ], "prompt_number": 2 }, { "cell_type": "heading", "level": 1, "metadata": {}, "source": [ "Import Simpson Island paleomagnetic data" ] }, { "cell_type": "markdown", "metadata": {}, "source": [ "The data file FlowDataAll.csv has data in this format:\n", "\n", "SITE, STRAT_HEIGHT, DEC_GEO, INC_GEO, Dec_TC, INC_TC, A95, n, Plat, ABS_Plat, VGP_lat, VGP_long\n", "\n", "where: \n", "\n", "**SITE** is the name of the site and corresponds to an individual lava flow where in the first part of the site name (e.g. SI1) corresponds to the name of a stratigraphic section while the second part (e.g. (11.8 to 26.4)) corresponds to the stratigraphic ranges within the measured section over which the flows is exposed.\n", "\n", "**STRAT_HEIGHT** is the cumulative stratigraphic height of the Simpson Island stratigraphy starting with the base of the SI1 section (see map in the main manuscript).\n", "\n", "**DEC_GEO** is the site mean declination in geographic (i.e. *in situ*) coordinates prior to tilt-correction.\n", "\n", "**INC_GEO** is the site mean inclination in geographic (i.e. *in situ*) coordinates prior to tilt-correction.\n", "\n", "**Dec_TC** is the site mean declination in tilt-corrected coordinates following correction for bedding tilt.\n", "\n", "**INC_TC** is the site mean inclination in tilt-corrected coordinates following correction for bedding tilt.\n", "\n", "**A95** is the 95$\\%$ Fisher confidence ellipse around the calculated site mean.\n", "\n", "**n** is the number of individually oriented samples that are being included to calculate the site mean.\n", "\n", "**Plat** is the paleolatitude calculated from the site mean using the dipole equation.\n", "\n", "**ABS_Plat** is the absolute value of this paleolatitude.\n", "\n", "**VGP_lat** is the latitude of the virtual geomagnetic pole calculated using the site location and the site mean direction.\n", "\n", "**VGP_long** is the longitude of the virtual geomagnetic pole calculated using the site location and the site mean direction.\n", "\n", "These data are displayed in a table below and imported by variable in the cell below the table." ] }, { "cell_type": "heading", "level": 2, "metadata": {}, "source": [ "Table of Simpson Island paleomagnetic data" ] }, { "cell_type": "code", "collapsed": false, "input": [ "data = pandas.read_csv('../2014_Osler_Data/SimpsonIsland_OslerData.csv')\n", "#write these data to a latex file for the supplemental PDF\n", "with open('OslerData.txt','w') as f:\n", " f.write(data.to_latex(index=False,columns=['Site','Strat_Height','Site_Lat','Site_Long','Dec_Geo','Inc_Geo','Dec_TC','Inc_TC','n','VGP_lat','VGP_long']))\n", "display(HTML(data.to_html()))" ], "language": "python", "metadata": {}, "outputs": [ { "html": [ "
\n", " | Site | \n", "Strat_Height | \n", "Site_Lat | \n", "Site_Long | \n", "Dec_Geo | \n", "Inc_Geo | \n", "Dec_TC | \n", "Inc_TC | \n", "A95 | \n", "n | \n", "Plat | \n", "ABS_Plat | \n", "VGP_lat | \n", "VGP_long | \n", "
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | \n", "SI1(11.8 to 26.4) | \n", "11.8 | \n", "48.8122 | \n", "-87.6620 | \n", "120.3 | \n", "-77.1 | \n", "79.7 | \n", "-70.5 | \n", "2.7 | \n", "7 | \n", "-54.7 | \n", "54.7 | \n", "33.1 | \n", "229.6 | \n", "
1 | \n", "SI1(28.3 to 29.2) | \n", "28.3 | \n", "48.8107 | \n", "-87.6623 | \n", "141.0 | \n", "-67.4 | \n", "109.8 | \n", "-66.8 | \n", "3.9 | \n", "7 | \n", "-49.4 | \n", "49.4 | \n", "45.8 | \n", "210.9 | \n", "
2 | \n", "SI1(29.2 to 29.7) | \n", "29.2 | \n", "48.8104 | \n", "-87.6622 | \n", "131.2 | \n", "-69.1 | \n", "99.7 | \n", "-66.2 | \n", "5.7 | \n", "3 | \n", "-48.6 | \n", "48.6 | \n", "39.6 | \n", "214.5 | \n", "
3 | \n", "SI1(33.3 to 37.1) | \n", "33.3 | \n", "48.8100 | \n", "-87.6623 | \n", "127.7 | \n", "-72.3 | \n", "92.6 | \n", "-68.1 | \n", "7.7 | \n", "5 | \n", "-51.2 | \n", "51.2 | \n", "37.2 | \n", "220.5 | \n", "
4 | \n", "SI1(40.6 to 42.5) | \n", "40.6 | \n", "48.8095 | \n", "-87.6626 | \n", "134.9 | \n", "-77.7 | \n", "85.4 | \n", "-73.3 | \n", "3.5 | \n", "6 | \n", "-59.0 | \n", "59.0 | \n", "38.2 | \n", "231.6 | \n", "
5 | \n", "SI1(42.5 to 44.4) | \n", "42.5 | \n", "48.8095 | \n", "-87.6627 | \n", "103.0 | \n", "-71.6 | \n", "77.8 | \n", "-63.5 | \n", "4.5 | \n", "6 | \n", "-45.1 | \n", "45.1 | \n", "25.8 | \n", "222.3 | \n", "
6 | \n", "SI1(58.1 to 64.1) | \n", "58.1 | \n", "48.8086 | \n", "-87.6622 | \n", "114.4 | \n", "-70.8 | \n", "86.1 | \n", "-64.4 | \n", "8.7 | \n", "5 | \n", "-46.2 | \n", "46.2 | \n", "30.8 | \n", "218.8 | \n", "
7 | \n", "SI1(87.6 to 88.5) | \n", "87.6 | \n", "48.8073 | \n", "-87.6620 | \n", "134.3 | \n", "-75.8 | \n", "89.9 | \n", "-71.9 | \n", "1.9 | \n", "6 | \n", "-56.9 | \n", "56.9 | \n", "39.0 | \n", "227.7 | \n", "
8 | \n", "SI1(88.5 to 89.2) | \n", "88.5 | \n", "48.8071 | \n", "-87.6619 | \n", "128.2 | \n", "-74.6 | \n", "88.9 | \n", "-70.0 | \n", "5.0 | \n", "5 | \n", "-53.9 | \n", "53.9 | \n", "36.9 | \n", "224.9 | \n", "
9 | \n", "SI1(89.2 to 91.5) | \n", "89.2 | \n", "48.8070 | \n", "-87.6618 | \n", "120.1 | \n", "-72.8 | \n", "87.0 | \n", "-67.2 | \n", "7.6 | \n", "5 | \n", "-49.9 | \n", "49.9 | \n", "33.6 | \n", "221.8 | \n", "
10 | \n", "SI1(91.5 to 92.6) | \n", "91.5 | \n", "48.8069 | \n", "-87.6618 | \n", "118.4 | \n", "-74.8 | \n", "82.8 | \n", "-68.5 | \n", "3.0 | \n", "6 | \n", "-51.8 | \n", "51.8 | \n", "32.7 | \n", "225.5 | \n", "
11 | \n", "SI1(94.3 to 94.9) | \n", "94.3 | \n", "48.8068 | \n", "-87.6620 | \n", "145.5 | \n", "-76.5 | \n", "94.1 | \n", "-74.4 | \n", "4.3 | \n", "5 | \n", "-60.8 | \n", "60.8 | \n", "42.8 | \n", "230.8 | \n", "
12 | \n", "SI1(94.9 to 96.6) | \n", "94.9 | \n", "48.8066 | \n", "-87.6621 | \n", "136.6 | \n", "-80.0 | \n", "79.1 | \n", "-75.0 | \n", "2.3 | \n", "5 | \n", "-61.7 | \n", "61.7 | \n", "37.2 | \n", "236.6 | \n", "
13 | \n", "SI1(116.3 to 118.8) | \n", "116.3 | \n", "48.8062 | \n", "-87.6634 | \n", "112.9 | \n", "-78.2 | \n", "74.1 | \n", "-70.3 | \n", "6.4 | \n", "6 | \n", "-54.4 | \n", "54.4 | \n", "30.4 | \n", "231.8 | \n", "
14 | \n", "SI1(119.7 to 122.1) | \n", "119.7 | \n", "48.8060 | \n", "-87.6634 | \n", "124.2 | \n", "-74.0 | \n", "87.5 | \n", "-68.9 | \n", "6.8 | \n", "5 | \n", "-52.3 | \n", "52.3 | \n", "35.3 | \n", "223.9 | \n", "
15 | \n", "SI1(122.1 to 123.7) | \n", "122.1 | \n", "48.8058 | \n", "-87.6633 | \n", "111.3 | \n", "-76.8 | \n", "75.7 | \n", "-69.1 | \n", "4.9 | \n", "6 | \n", "-52.6 | \n", "52.6 | \n", "30.0 | \n", "229.6 | \n", "
16 | \n", "SI2a (1.1 to 1.6) | \n", "442.1 | \n", "48.7943 | \n", "-87.6556 | \n", "139.0 | \n", "-54.1 | \n", "117.1 | \n", "-58.1 | \n", "4.1 | \n", "6 | \n", "-38.8 | \n", "38.8 | \n", "44.8 | \n", "194.2 | \n", "
17 | \n", "SI2a (10.2 to 12.8) | \n", "451.2 | \n", "48.7940 | \n", "-87.6555 | \n", "171.8 | \n", "-57.3 | \n", "152.3 | \n", "-68.8 | \n", "4.8 | \n", "6 | \n", "-52.1 | \n", "52.1 | \n", "72.2 | \n", "203.7 | \n", "
18 | \n", "SI2b (2.2 to 2.6) | \n", "519.2 | \n", "48.7921 | \n", "-87.6546 | \n", "144.7 | \n", "-57.3 | \n", "120.0 | \n", "-62.4 | \n", "4.2 | \n", "8 | \n", "-43.7 | \n", "43.7 | \n", "49.3 | \n", "198.7 | \n", "
19 | \n", "SI2b (10.5 to 10.6) | \n", "527.5 | \n", "48.7916 | \n", "-87.6539 | \n", "140.7 | \n", "-64.3 | \n", "107.4 | \n", "-67.3 | \n", "4.4 | \n", "5 | \n", "-50.0 | \n", "50.0 | \n", "44.7 | \n", "212.8 | \n", "
20 | \n", "SI2c (0.0 to 2.1) | \n", "592.0 | \n", "48.7903 | \n", "-87.6545 | \n", "120.9 | \n", "-38.7 | \n", "108.7 | \n", "-39.2 | \n", "4.4 | \n", "6 | \n", "-22.2 | \n", "22.2 | \n", "28.7 | \n", "184.0 | \n", "
21 | \n", "SI2c (2.1 to 18.6) | \n", "594.1 | \n", "48.7902 | \n", "-87.6545 | \n", "127.2 | \n", "-45.6 | \n", "111.3 | \n", "-47.3 | \n", "2.4 | \n", "6 | \n", "-28.5 | \n", "28.5 | \n", "34.7 | \n", "187.5 | \n", "
22 | \n", "SI3(2.3 to 5.5) | \n", "745.3 | \n", "48.7828 | \n", "-87.6326 | \n", "156.0 | \n", "-56.8 | \n", "135.4 | \n", "-69.3 | \n", "4.5 | \n", "6 | \n", "-52.9 | \n", "52.9 | \n", "62.0 | \n", "208.0 | \n", "
23 | \n", "SI3(5.5 to 12.5) | \n", "748.5 | \n", "48.7826 | \n", "-87.6323 | \n", "154.3 | \n", "-60.9 | \n", "127.5 | \n", "-72.5 | \n", "3.6 | \n", "10 | \n", "-57.8 | \n", "57.8 | \n", "58.2 | \n", "218.9 | \n", "
24 | \n", "SI3(12.5 to 20.1) | \n", "755.5 | \n", "48.7823 | \n", "-87.6318 | \n", "145.9 | \n", "-64.8 | \n", "109.1 | \n", "-73.7 | \n", "6.2 | \n", "6 | \n", "-59.6 | \n", "59.6 | \n", "49.3 | \n", "225.3 | \n", "
25 | \n", "SI3(20.1 to 28.9) | \n", "763.1 | \n", "48.7821 | \n", "-87.6316 | \n", "140.1 | \n", "-61.4 | \n", "108.1 | \n", "-69.3 | \n", "1.9 | \n", "9 | \n", "-52.9 | \n", "52.9 | \n", "46.7 | \n", "216.0 | \n", "
26 | \n", "SI3(36.9 to 48.4) | \n", "779.9 | \n", "48.7817 | \n", "-87.6310 | \n", "136.0 | \n", "-64.7 | \n", "99.6 | \n", "-70.5 | \n", "4.3 | \n", "6 | \n", "-54.7 | \n", "54.7 | \n", "42.6 | \n", "221.6 | \n", "
27 | \n", "SI3(55.8 to 60.9) | \n", "798.8 | \n", "48.7812 | \n", "-87.6304 | \n", "139.9 | \n", "-63.2 | \n", "105.6 | \n", "-70.7 | \n", "4.3 | \n", "6 | \n", "-55.0 | \n", "55.0 | \n", "45.9 | \n", "219.8 | \n", "
28 | \n", "SI3(103.3 to 110.3) | \n", "846.3 | \n", "48.7799 | \n", "-87.6295 | \n", "122.4 | \n", "-65.9 | \n", "84.0 | \n", "-68.1 | \n", "6.1 | \n", "6 | \n", "-51.2 | \n", "51.2 | \n", "32.9 | \n", "224.5 | \n", "
29 | \n", "SI3(124.8 to 130.4) | \n", "867.8 | \n", "48.7791 | \n", "-87.6292 | \n", "114.1 | \n", "-63.1 | \n", "81.5 | \n", "-63.7 | \n", "5.0 | \n", "5 | \n", "-45.3 | \n", "45.3 | \n", "27.8 | \n", "220.5 | \n", "
30 | \n", "SI9(0.0 to 9.2) | \n", "1183.0 | \n", "48.7721 | \n", "-87.6222 | \n", "104.4 | \n", "-73.3 | \n", "54.5 | \n", "-67.3 | \n", "3.2 | \n", "7 | \n", "-50.1 | \n", "50.1 | \n", "19.4 | \n", "238.8 | \n", "
31 | \n", "SI9(12.0 to 21.2) | \n", "1195.0 | \n", "48.7718 | \n", "-87.6221 | \n", "107.7 | \n", "-69.0 | \n", "64.4 | \n", "-65.3 | \n", "4.1 | \n", "8 | \n", "-47.4 | \n", "47.4 | \n", "21.1 | \n", "231.5 | \n", "
32 | \n", "SI9(66.9 to 84.0) | \n", "1249.9 | \n", "48.7700 | \n", "-87.6203 | \n", "116.0 | \n", "-70.0 | \n", "67.4 | \n", "-68.1 | \n", "3.6 | \n", "7 | \n", "-51.3 | \n", "51.3 | \n", "25.3 | \n", "232.7 | \n", "
33 | \n", "SI9(84.0 to 88.9) | \n", "1267.0 | \n", "48.7696 | \n", "-87.6204 | \n", "104.7 | \n", "-76.7 | \n", "47.1 | \n", "-69.2 | \n", "4.2 | \n", "8 | \n", "-52.8 | \n", "52.8 | \n", "19.1 | \n", "244.4 | \n", "
34 | \n", "SI9(139.8 to 160.0) | \n", "1322.8 | \n", "48.7680 | \n", "-87.6192 | \n", "117.6 | \n", "-48.6 | \n", "96.0 | \n", "-51.8 | \n", "5.4 | \n", "8 | \n", "-32.4 | \n", "32.4 | \n", "27.5 | \n", "201.2 | \n", "
35 | \n", "SI9(160.0 to 166.5) | \n", "1343.0 | \n", "48.7676 | \n", "-87.6189 | \n", "120.6 | \n", "-49.2 | \n", "98.5 | \n", "-53.2 | \n", "4.7 | \n", "8 | \n", "-33.8 | \n", "33.8 | \n", "29.9 | \n", "200.8 | \n", "
36 | \n", "SI9(166.5 to 171.4) | \n", "1349.5 | \n", "48.7674 | \n", "-87.6185 | \n", "129.3 | \n", "-45.9 | \n", "109.6 | \n", "-53.0 | \n", "9.3 | \n", "8 | \n", "-33.5 | \n", "33.5 | \n", "36.9 | \n", "193.5 | \n", "
37 | \n", "SI9(171.4 to 188.8) | \n", "1354.4 | \n", "48.7672 | \n", "-87.6190 | \n", "127.2 | \n", "-39.1 | \n", "111.7 | \n", "-46.1 | \n", "6.9 | \n", "6 | \n", "-27.5 | \n", "27.5 | \n", "34.3 | \n", "186.3 | \n", "
38 | \n", "SI9(312.1 to 321.0) | \n", "1495.1 | \n", "48.7662 | \n", "-87.6181 | \n", "143.6 | \n", "-50.4 | \n", "121.8 | \n", "-61.2 | \n", "2.8 | \n", "8 | \n", "-42.3 | \n", "42.3 | \n", "49.7 | \n", "195.8 | \n", "
39 | \n", "SI9(336.4 to 353.8) | \n", "1519.4 | \n", "48.7630 | \n", "-87.6151 | \n", "135.7 | \n", "-47.6 | \n", "115.2 | \n", "-56.4 | \n", "3.9 | \n", "8 | \n", "-37.0 | \n", "37.0 | \n", "42.6 | \n", "193.4 | \n", "
40 | \n", "SI9(375.9 to 381.0) | \n", "1558.9 | \n", "48.7623 | \n", "-87.6142 | \n", "136.1 | \n", "-46.3 | \n", "116.6 | \n", "-55.3 | \n", "7.3 | \n", "4 | \n", "-35.9 | \n", "35.9 | \n", "42.8 | \n", "191.3 | \n", "
41 | \n", "SI9(387.6 to 395.3) | \n", "1570.6 | \n", "48.7620 | \n", "-87.6140 | \n", "137.6 | \n", "-46.8 | \n", "117.8 | \n", "-56.2 | \n", "6.9 | \n", "7 | \n", "-36.7 | \n", "36.7 | \n", "44.1 | \n", "191.4 | \n", "
42 | \n", "SI9(395.3 to 399.3) | \n", "1578.3 | \n", "48.7617 | \n", "-87.6138 | \n", "143.2 | \n", "-53.4 | \n", "118.3 | \n", "-63.8 | \n", "4.1 | \n", "7 | \n", "-45.4 | \n", "45.4 | \n", "49.0 | \n", "201.9 | \n", "
43 | \n", "SI4(0.0 to 13.8) | \n", "1983.0 | \n", "48.7525 | \n", "-87.5971 | \n", "152.7 | \n", "-60.8 | \n", "119.4 | \n", "-72.7 | \n", "3.0 | \n", "6 | \n", "-58.1 | \n", "58.1 | \n", "54.1 | \n", "220.8 | \n", "
44 | \n", "SI4(13.8 to 20.2) | \n", "1996.8 | \n", "48.7524 | \n", "-87.5973 | \n", "148.6 | \n", "-62.2 | \n", "111.4 | \n", "-72.6 | \n", "2.2 | \n", "6 | \n", "-57.9 | \n", "57.9 | \n", "49.9 | \n", "222.2 | \n", "
45 | \n", "SI4(21.4 to 30.0) | \n", "2004.4 | \n", "48.7520 | \n", "-87.5972 | \n", "140.7 | \n", "-63.1 | \n", "100.7 | \n", "-70.8 | \n", "3.4 | \n", "7 | \n", "-55.2 | \n", "55.2 | \n", "43.4 | \n", "221.9 | \n", "
46 | \n", "SI4(39.7 to 44.7) | \n", "2022.7 | \n", "48.7516 | \n", "-87.5967 | \n", "165.5 | \n", "-58.5 | \n", "143.2 | \n", "-73.9 | \n", "5.1 | \n", "6 | \n", "-60.0 | \n", "60.0 | \n", "66.2 | \n", "224.4 | \n", "
47 | \n", "SI4(72.3 to 74.6) | \n", "2055.3 | \n", "48.7508 | \n", "-87.5957 | \n", "159.1 | \n", "-58.6 | \n", "132.4 | \n", "-72.7 | \n", "3.3 | \n", "6 | \n", "-58.0 | \n", "58.0 | \n", "60.9 | \n", "219.0 | \n", "
48 | \n", "SI4(74.6 to 80.0) | \n", "2057.6 | \n", "48.7507 | \n", "-87.5953 | \n", "152.5 | \n", "-52.0 | \n", "131.4 | \n", "-65.0 | \n", "1.8 | \n", "6 | \n", "-47.0 | \n", "47.0 | \n", "57.9 | \n", "198.0 | \n", "
49 | \n", "SI4(80.2 to 100.7) | \n", "2063.2 | \n", "48.7505 | \n", "-87.5951 | \n", "145.1 | \n", "-54.1 | \n", "119.8 | \n", "-64.8 | \n", "4.7 | \n", "8 | \n", "-46.8 | \n", "46.8 | \n", "50.5 | \n", "203.1 | \n", "
50 | \n", "SI4(106.0 to 121.4) | \n", "2089.0 | \n", "48.7499 | \n", "-87.5953 | \n", "140.0 | \n", "-46.6 | \n", "120.7 | \n", "-56.8 | \n", "4.3 | \n", "7 | \n", "-37.4 | \n", "37.4 | \n", "46.4 | \n", "190.3 | \n", "
51 | \n", "SI4(121.4 to 127.3) | \n", "2104.4 | \n", "48.7494 | \n", "-87.5954 | \n", "129.6 | \n", "-43.6 | \n", "111.5 | \n", "-50.9 | \n", "4.1 | \n", "7 | \n", "-31.6 | \n", "31.6 | \n", "36.9 | \n", "190.4 | \n", "
52 | \n", "SI4(133.8 to 143.1) | \n", "2116.8 | \n", "48.7490 | \n", "-87.5955 | \n", "134.8 | \n", "-52.7 | \n", "109.6 | \n", "-60.6 | \n", "4.7 | \n", "7 | \n", "-41.6 | \n", "41.6 | \n", "41.7 | \n", "201.8 | \n", "
53 | \n", "SI4(160.4 to 171.1) | \n", "2143.4 | \n", "48.7485 | \n", "-87.5958 | \n", "163.7 | \n", "-46.6 | \n", "151.1 | \n", "-62.4 | \n", "4.0 | \n", "8 | \n", "-43.7 | \n", "43.7 | \n", "69.5 | \n", "179.1 | \n", "
54 | \n", "SI8(0.0 to 3.9) | \n", "2336.0 | \n", "48.7466 | \n", "-87.6194 | \n", "152.4 | \n", "-56.4 | \n", "126.1 | \n", "-68.9 | \n", "2.2 | \n", "8 | \n", "-52.3 | \n", "52.3 | \n", "56.4 | \n", "209.4 | \n", "
55 | \n", "SI8(3.9 to 19.3) | \n", "2339.9 | \n", "48.7465 | \n", "-87.6195 | \n", "153.2 | \n", "-59.3 | \n", "123.0 | \n", "-71.6 | \n", "5.3 | \n", "7 | \n", "-56.4 | \n", "56.4 | \n", "55.6 | \n", "217.1 | \n", "
56 | \n", "SI8(19.3 to 45.0) | \n", "2355.3 | \n", "48.7462 | \n", "-87.6200 | \n", "132.9 | \n", "-51.6 | \n", "108.7 | \n", "-59.1 | \n", "5.5 | \n", "8 | \n", "-39.9 | \n", "39.9 | \n", "40.1 | \n", "200.5 | \n", "
57 | \n", "SI8(47.5 to 56.7) | \n", "2383.5 | \n", "48.7458 | \n", "-87.6211 | \n", "145.6 | \n", "-53.4 | \n", "121.2 | \n", "-64.4 | \n", "5.6 | \n", "6 | \n", "-46.2 | \n", "46.2 | \n", "51.2 | \n", "201.6 | \n", "
58 | \n", "SI8(62.9 to 84.4) | \n", "2398.9 | \n", "48.7456 | \n", "-87.6223 | \n", "140.2 | \n", "-61.5 | \n", "103.3 | \n", "-69.6 | \n", "2.7 | \n", "8 | \n", "-53.4 | \n", "53.4 | \n", "43.9 | \n", "218.6 | \n", "
59 | \n", "SI8(84.4 to 102.6) | \n", "2420.4 | \n", "48.7453 | \n", "-87.6239 | \n", "121.2 | \n", "-64.7 | \n", "80.9 | \n", "-66.0 | \n", "4.3 | \n", "8 | \n", "-48.3 | \n", "48.3 | \n", "29.5 | \n", "223.4 | \n", "
60 | \n", "SI8(106.6 to 115.4) | \n", "2442.6 | \n", "48.7449 | \n", "-87.6276 | \n", "135.2 | \n", "-58.0 | \n", "103.8 | \n", "-65.2 | \n", "7.2 | \n", "8 | \n", "-47.3 | \n", "47.3 | \n", "41.2 | \n", "211.2 | \n", "
61 | \n", "SI6(0.0 to 3.0) | \n", "2451.0 | \n", "48.7462 | \n", "-87.6393 | \n", "137.0 | \n", "-55.3 | \n", "103.2 | \n", "-63.3 | \n", "6.1 | \n", "5 | \n", "-44.8 | \n", "44.8 | \n", "39.5 | \n", "208.7 | \n", "
62 | \n", "SI6(12.0 to 28.4) | \n", "2463.0 | \n", "48.7460 | \n", "-87.6394 | \n", "120.8 | \n", "-62.8 | \n", "78.3 | \n", "-63.0 | \n", "2.3 | \n", "8 | \n", "-44.5 | \n", "44.5 | \n", "25.5 | \n", "221.6 | \n", "
63 | \n", "SI6(40.6 to 57.8) | \n", "2491.6 | \n", "48.7451 | \n", "-87.6393 | \n", "134.8 | \n", "-59.1 | \n", "95.2 | \n", "-65.3 | \n", "5.3 | \n", "6 | \n", "-47.4 | \n", "47.4 | \n", "36.5 | \n", "215.5 | \n", "
64 | \n", "SI6(76.5 to 94.1) | \n", "2527.5 | \n", "48.7448 | \n", "-87.6486 | \n", "149.8 | \n", "-61.3 | \n", "105.2 | \n", "-72.2 | \n", "6.0 | \n", "7 | \n", "-57.3 | \n", "57.3 | \n", "46.5 | \n", "223.0 | \n", "
65 | \n", "SI6(94.1 to 104.2) | \n", "2545.1 | \n", "48.7445 | \n", "-87.6486 | \n", "160.6 | \n", "-65.4 | \n", "103.4 | \n", "-78.6 | \n", "3.8 | \n", "5 | \n", "-68.1 | \n", "68.1 | \n", "49.0 | \n", "238.8 | \n", "
66 | \n", "SI6(122.3 to 127.6) | \n", "2573.3 | \n", "48.7439 | \n", "-87.6493 | \n", "159.0 | \n", "-70.0 | \n", "79.9 | \n", "-79.5 | \n", "6.3 | \n", "7 | \n", "-69.7 | \n", "69.7 | \n", "41.7 | \n", "245.2 | \n", "
67 | \n", "SI6(180.6 to 188.8) | \n", "2631.6 | \n", "48.7423 | \n", "-87.6500 | \n", "105.6 | \n", "-56.6 | \n", "75.3 | \n", "-53.3 | \n", "4.6 | \n", "8 | \n", "-33.9 | \n", "33.9 | \n", "16.2 | \n", "215.6 | \n", "
68 | \n", "SI6(208.4 to 219.9) | \n", "2659.4 | \n", "48.7415 | \n", "-87.6483 | \n", "125.1 | \n", "-46.8 | \n", "100.9 | \n", "-52.0 | \n", "5.8 | \n", "5 | \n", "-32.6 | \n", "32.6 | \n", "30.7 | \n", "198.3 | \n", "
69 | \n", "SI6(245.4 to 252.7) | \n", "2696.4 | \n", "48.7405 | \n", "-87.6476 | \n", "133.1 | \n", "-47.3 | \n", "108.3 | \n", "-55.3 | \n", "4.9 | \n", "7 | \n", "-35.9 | \n", "35.9 | \n", "37.5 | \n", "196.6 | \n", "
70 | \n", "SI6(268.4 to 289.5) | \n", "2719.4 | \n", "48.7399 | \n", "-87.6467 | \n", "135.0 | \n", "-60.4 | \n", "93.1 | \n", "-66.3 | \n", "2.7 | \n", "8 | \n", "-48.8 | \n", "48.8 | \n", "36.1 | \n", "217.8 | \n", "
71 | \n", "SI6(289.8 to 301.1) | \n", "2740.8 | \n", "48.7393 | \n", "-87.6464 | \n", "133.7 | \n", "-54.0 | \n", "101.7 | \n", "-61.0 | \n", "5.0 | \n", "8 | \n", "-42.0 | \n", "42.0 | \n", "37.1 | \n", "206.7 | \n", "
72 | \n", "SI7 (0.0 to 3.9) | \n", "2798.0 | \n", "48.7406 | \n", "-87.6682 | \n", "143.6 | \n", "-37.9 | \n", "128.6 | \n", "-48.4 | \n", "2.4 | \n", "8 | \n", "-29.4 | \n", "29.4 | \n", "46.7 | \n", "175.2 | \n", "
73 | \n", "SI7 (3.9 to 5.4) | \n", "2801.9 | \n", "48.7405 | \n", "-87.6684 | \n", "149.4 | \n", "-41.7 | \n", "132.8 | \n", "-53.6 | \n", "9.2 | \n", "7 | \n", "-34.1 | \n", "34.1 | \n", "52.4 | \n", "177.4 | \n", "
74 | \n", "SI7 (9.6 to 18.0) | \n", "2807.6 | \n", "48.7403 | \n", "-87.6684 | \n", "141.2 | \n", "-46.6 | \n", "120.1 | \n", "-55.6 | \n", "6.9 | \n", "7 | \n", "-36.1 | \n", "36.1 | \n", "45.3 | \n", "189.2 | \n", "
75 | \n", "SI5b(3.2 to 30.7) | \n", "2843.2 | \n", "48.7408 | \n", "-87.6765 | \n", "136.3 | \n", "-50.0 | \n", "111.9 | \n", "-57.1 | \n", "4.0 | \n", "6 | \n", "-37.7 | \n", "37.7 | \n", "40.9 | \n", "196.2 | \n", "
76 | \n", "SI5b(57.2 to 63.3) | \n", "2897.2 | \n", "48.7402 | \n", "-87.6838 | \n", "115.1 | \n", "-41.3 | \n", "97.9 | \n", "-42.5 | \n", "5.6 | \n", "6 | \n", "-24.6 | \n", "24.6 | \n", "23.3 | \n", "193.7 | \n", "
77 | \n", "SI5b(64.6 to 70.4) | \n", "2904.6 | \n", "48.7401 | \n", "-87.6841 | \n", "121.4 | \n", "-47.9 | \n", "99.2 | \n", "-50.4 | \n", "6.1 | \n", "5 | \n", "-31.1 | \n", "31.1 | \n", "28.6 | \n", "198.0 | \n", "
78 | \n", "SI5b(72.6 to 79.0) | \n", "2912.6 | \n", "48.7399 | \n", "-87.6845 | \n", "118.8 | \n", "-47.7 | \n", "97.0 | \n", "-49.4 | \n", "3.5 | \n", "6 | \n", "-30.3 | \n", "30.3 | \n", "26.6 | \n", "198.8 | \n", "
79 | \n", "SI5b(115.0 to 120.2) | \n", "2955.0 | \n", "48.7388 | \n", "-87.6855 | \n", "137.6 | \n", "-48.3 | \n", "114.7 | \n", "-56.0 | \n", "2.3 | \n", "9 | \n", "-36.5 | \n", "36.5 | \n", "42.0 | \n", "193.2 | \n", "
80 | \n", "SI5b(132.4 to 171.9) | \n", "2972.4 | \n", "48.7385 | \n", "-87.6864 | \n", "133.6 | \n", "-55.5 | \n", "103.5 | \n", "-60.9 | \n", "4.6 | \n", "7 | \n", "-41.9 | \n", "41.9 | \n", "38.1 | \n", "205.5 | \n", "
81 | \n", "SI5b(183.4 to 188.7) | \n", "3023.4 | \n", "48.7376 | \n", "-87.6934 | \n", "142.4 | \n", "-52.3 | \n", "116.0 | \n", "-61.0 | \n", "3.5 | \n", "5 | \n", "-42.1 | \n", "42.1 | \n", "45.9 | \n", "198.8 | \n", "
82 | \n", "SI5b(197.5 to 216.7) | \n", "3037.5 | \n", "48.7373 | \n", "-87.6935 | \n", "142.5 | \n", "-63.7 | \n", "98.7 | \n", "-70.0 | \n", "4.2 | \n", "6 | \n", "-53.9 | \n", "53.9 | \n", "41.8 | \n", "221.0 | \n", "
83 | \n", "SI5a(0.0 to 9.0) | \n", "3115.0 | \n", "48.7363 | \n", "-87.6962 | \n", "133.7 | \n", "-45.7 | \n", "112.8 | \n", "-52.5 | \n", "3.9 | \n", "12 | \n", "-33.1 | \n", "33.1 | \n", "38.7 | \n", "190.9 | \n", "
\n", " | Study | \n", "Site_ID | \n", "AFstep_Oe | \n", "dec_tc | \n", "inc_tc | \n", "kappa | \n", "n | \n", "site_lat | \n", "site_long | \n", "
---|---|---|---|---|---|---|---|---|---|
0 | \n", "Halls1974a | \n", "1 | \n", "200 | \n", "289.8 | \n", "43.6 | \n", "517 | \n", "5 | \n", "48.63 | \n", "-88.11 | \n", "
1 | \n", "Halls1974a | \n", "2 | \n", "150 | \n", "285.7 | \n", "42.0 | \n", "243 | \n", "5 | \n", "48.64 | \n", "-88.09 | \n", "
2 | \n", "Halls1974a | \n", "3 | \n", "100 | \n", "307.4 | \n", "37.9 | \n", "2485 | \n", "5 | \n", "48.64 | \n", "-88.07 | \n", "
3 | \n", "Halls1974a | \n", "4 | \n", "150 | \n", "302.8 | \n", "29.9 | \n", "331 | \n", "5 | \n", "48.66 | \n", "-88.04 | \n", "
4 | \n", "Halls1974a | \n", "5 | \n", "300 | \n", "294.7 | \n", "42.5 | \n", "130 | \n", "5 | \n", "48.66 | \n", "-88.04 | \n", "
5 | \n", "Halls1974a | \n", "6 | \n", "100 | \n", "106.1 | \n", "-44.2 | \n", "70 | \n", "5 | \n", "48.66 | \n", "-88.05 | \n", "
6 | \n", "Halls1974a | \n", "7 | \n", "250 | \n", "109.8 | \n", "-62.4 | \n", "351 | \n", "6 | \n", "48.68 | \n", "-88.02 | \n", "
7 | \n", "Halls1974a | \n", "8 | \n", "400 | \n", "140.7 | \n", "-64.8 | \n", "679 | \n", "5 | \n", "48.68 | \n", "-88.03 | \n", "
8 | \n", "Halls1974a | \n", "9 | \n", "150 | \n", "110.0 | \n", "-56.6 | \n", "321 | \n", "3 | \n", "48.68 | \n", "-88.06 | \n", "
9 | \n", "Halls1974a | \n", "10 | \n", "150 | \n", "128.2 | \n", "-42.0 | \n", "59 | \n", "5 | \n", "48.66 | \n", "-88.07 | \n", "
10 | \n", "Halls1974a | \n", "11 | \n", "400 | \n", "88.3 | \n", "-59.1 | \n", "456 | \n", "3 | \n", "48.66 | \n", "-88.07 | \n", "
11 | \n", "Halls1974a | \n", "12 | \n", "250 | \n", "118.6 | \n", "-48.9 | \n", "240 | \n", "5 | \n", "48.66 | \n", "-88.08 | \n", "
12 | \n", "Halls1974a | \n", "13 | \n", "250 | \n", "128.1 | \n", "-38.0 | \n", "886 | \n", "3 | \n", "48.65 | \n", "-88.09 | \n", "
13 | \n", "Halls1974a | \n", "14 | \n", "200 | \n", "108.2 | \n", "-55.8 | \n", "121 | \n", "6 | \n", "48.65 | \n", "-88.08 | \n", "
14 | \n", "Halls1974a | \n", "15 | \n", "300 | \n", "118.5 | \n", "-46.0 | \n", "402 | \n", "6 | \n", "48.65 | \n", "-88.10 | \n", "
15 | \n", "Halls1974a | \n", "16 | \n", "150 | \n", "106.0 | \n", "-54.2 | \n", "125 | \n", "6 | \n", "48.64 | \n", "-88.10 | \n", "
16 | \n", "Halls1974a | \n", "17 | \n", "300 | \n", "93.7 | \n", "-54.1 | \n", "362 | \n", "4 | \n", "48.63 | \n", "-88.11 | \n", "
17 | \n", "Halls1974a | \n", "18 | \n", "200 | \n", "116.0 | \n", "-53.0 | \n", "224 | \n", "4 | \n", "48.61 | \n", "-88.16 | \n", "
18 | \n", "Halls1974a | \n", "19 | \n", "200 | \n", "131.7 | \n", "-64.9 | \n", "871 | \n", "4 | \n", "48.61 | \n", "-88.17 | \n", "
19 | \n", "Halls1974a | \n", "20 | \n", "250 | \n", "119.9 | \n", "-55.8 | \n", "108 | \n", "4 | \n", "48.59 | \n", "-88.19 | \n", "
20 | \n", "Halls1974a | \n", "21 | \n", "300 | \n", "94.3 | \n", "-65.5 | \n", "84 | \n", "5 | \n", "48.64 | \n", "-88.12 | \n", "
21 | \n", "Halls1974a | \n", "22 | \n", "200 | \n", "91.8 | \n", "-58.2 | \n", "94 | \n", "5 | \n", "48.64 | \n", "-88.12 | \n", "
22 | \n", "Halls1974a | \n", "23 | \n", "300 | \n", "114.3 | \n", "-64.0 | \n", "69 | \n", "4 | \n", "48.62 | \n", "-88.16 | \n", "
23 | \n", "Halls1974a | \n", "24 | \n", "400 | \n", "116.8 | \n", "-40.4 | \n", "77 | \n", "3 | \n", "48.68 | \n", "-88.06 | \n", "
24 | \n", "Halls1974a | \n", "25 | \n", "150 | \n", "126.3 | \n", "-58.7 | \n", "166 | \n", "3 | \n", "48.69 | \n", "-88.05 | \n", "
25 | \n", "Halls1974a | \n", "26 | \n", "300 | \n", "112.0 | \n", "-75.1 | \n", "3634 | \n", "3 | \n", "48.71 | \n", "-88.07 | \n", "
26 | \n", "Halls1974a | \n", "27 | \n", "400 | \n", "118.6 | \n", "-70.3 | \n", "729 | \n", "3 | \n", "48.67 | \n", "-88.10 | \n", "
27 | \n", "Halls1974a | \n", "28 | \n", "150 | \n", "132.6 | \n", "-54.1 | \n", "1039 | \n", "3 | \n", "48.68 | \n", "-88.10 | \n", "
28 | \n", "Halls1974a | \n", "29 | \n", "250 | \n", "129.1 | \n", "-54.5 | \n", "1149 | \n", "3 | \n", "48.68 | \n", "-88.10 | \n", "
29 | \n", "Halls1974a | \n", "30 | \n", "300 | \n", "80.5 | \n", "-80.4 | \n", "267 | \n", "5 | \n", "48.59 | \n", "-88.22 | \n", "
30 rows \u00d7 9 columns
\n", "\n", " | Study | \n", "Site_ID | \n", "AFstep_Oe | \n", "dec_tc | \n", "inc_tc | \n", "kappa | \n", "n | \n", "site_lat | \n", "site_long | \n", "paleolatitude | \n", "pole_lat | \n", "pole_long | \n", "pole_lat_rev | \n", "pole_long_rev | \n", "
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | \n", "Halls1974a | \n", "1 | \n", "200 | \n", "289.8 | \n", "43.6 | \n", "517 | \n", "5 | \n", "48.63 | \n", "-88.11 | \n", "25.461154 | \n", "31.651781 | \n", "185.568167 | \n", "-31.651781 | \n", "5.568167 | \n", "
1 | \n", "Halls1974a | \n", "2 | \n", "150 | \n", "285.7 | \n", "42.0 | \n", "243 | \n", "5 | \n", "48.64 | \n", "-88.09 | \n", "24.237370 | \n", "28.110360 | \n", "187.509415 | \n", "-28.110360 | \n", "7.509415 | \n", "
2 | \n", "Halls1974a | \n", "3 | \n", "100 | \n", "307.4 | \n", "37.9 | \n", "2485 | \n", "5 | \n", "48.64 | \n", "-88.07 | \n", "21.267947 | \n", "40.260801 | \n", "167.888919 | \n", "-40.260801 | \n", "347.888919 | \n", "
3 | \n", "Halls1974a | \n", "4 | \n", "150 | \n", "302.8 | \n", "29.9 | \n", "331 | \n", "5 | \n", "48.66 | \n", "-88.04 | \n", "16.040618 | \n", "33.459149 | \n", "167.496979 | \n", "-33.459149 | \n", "347.496979 | \n", "
4 | \n", "Halls1974a | \n", "5 | \n", "300 | \n", "294.7 | \n", "42.5 | \n", "130 | \n", "5 | \n", "48.66 | \n", "-88.04 | \n", "24.615622 | \n", "34.309281 | \n", "181.259648 | \n", "-34.309281 | \n", "1.259648 | \n", "
5 rows \u00d7 14 columns
\n", "\n", " | site_ID | \n", "dec_tc | \n", "inc_tc | \n", "a95 | \n", "n | \n", "site_lat | \n", "site_long | \n", "pole_lat | \n", "pole_long | \n", "rem_type | \n", "sequence | \n", "unit | \n", "
---|---|---|---|---|---|---|---|---|---|---|---|---|
0 | \n", "ns002 | \n", "283.5 | \n", "38.7 | \n", "6.6 | \n", "4 | \n", "47.7341 | \n", "-90.4292 | \n", "24.9 | \n", "185.2 | \n", "hem | \n", "nneu | \n", "ngha | \n", "
1 | \n", "ns003 | \n", "286.9 | \n", "47.9 | \n", "3.8 | \n", "5 | \n", "47.7371 | \n", "-90.4114 | \n", "32.0 | \n", "188.9 | \n", "mixed | \n", "nneu | \n", "ngha | \n", "
2 | \n", "ns004 | \n", "290.0 | \n", "47.8 | \n", "5.6 | \n", "5 | \n", "47.7328 | \n", "-90.4363 | \n", "34.0 | \n", "186.7 | \n", "mag | \n", "nneu | \n", "ngha | \n", "
3 | \n", "ns005 | \n", "299.8 | \n", "37.6 | \n", "5.3 | \n", "4 | \n", "47.7254 | \n", "-90.4430 | \n", "35.3 | \n", "172.4 | \n", "mag | \n", "nneu | \n", "ngt | \n", "
4 | \n", "ns006 | \n", "294.8 | \n", "38.8 | \n", "3.0 | \n", "5 | \n", "47.7161 | \n", "-90.4904 | \n", "32.5 | \n", "177.0 | \n", "mag | \n", "nsl | \n", "NaN | \n", "
5 rows \u00d7 12 columns
\n", "