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  1. 121
    Time matters : geology's legacy to scientific thought /
    by Leddra, Michael
    Published 2010
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  2. 122
    The Geologic time scale 2012 /
    Published 2012
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  3. 123
    Geologic time scale bookmark.
    Published 2012
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    Government Document eBook
  4. 124
    Tables for the calculation of lead isotope ages /
    Government Document Book
  5. 125
    2013 North America unconventional resource plays /
    Published 2013
    Map
  6. 126
    Geological timetable /
    Published 1975
    Photo
  7. 127
    Bulletin of the Commission on the Determination of the Absolute Age of Geological Formations : parts I and II.
    Published 1960
    Government Document Book
  8. 128
    How old is the Earth? /
    by Hurley, Patrick M., 1912-
    Published 1979
    Book
  9. 129
    2014 North America unconventional resource plays /
    Published 2014
    Map
  10. 130
    Four revolutions in the earth sciences : from heresy to truth /
    by Powell, James Lawrence, 1936-
    Published 2015
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  11. 131
    Studies of Cave Sediments : Physical and Chemical Records of Paleoclimate /
    by Sasowsky, Ira D.
    Published 2004
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  12. 132
    The geologic time classification of the United States Geological Survey compared with other classifications, accompanied by the original definitions of era, period and epoch terms /
    Published 1925
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    Government Document eBook
  13. 133
    Encyclopedia of scientific dating methods /
    Published 2015
    Book
  14. 134
    The abyss of time : a study in geological time and Earth history /
    by Lyle, Paul
    Published 2016
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  15. 135
    Geochemical features and ⁴⁰Ar/³⁹Ar age of tholeiitic and mafic-alkalic dikes in Aroostook County, northeastern Maine /
    by Gottfried, David
    Published 1984
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    Government Document eBook
  16. 136
    Shorter contributions to isotope research /
    Published 1986
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  17. 137
    Stratigraphy and chronology of late interglacial and early Vashon glacial time in the Seattle area, Washington /
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  18. 138
    A concise geologic time scale 2016 /
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  19. 139
    Evaluation of the lead-alpha (Larsen) method for determining ages of igneous rocks /
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  20. 140
    Lead-alpha age determinations of accessory minerals of igneous rocks (1953-1957) /
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    Government Document eBook
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