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age

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    On Dr. Peale's Notes on the age of the Rocky Mountains in Colorado
    John James Stevenson
    American Journal of Science April 1877, s3-13 (76) 297-299; DOI: https://doi.org/10.2475/ajs.s3-13.76.297
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    On the Silurian age of the southern Appalachians
    Frank Howe Bradley
    American Journal of Science April 1875, s3-9 (52) 279-288; DOI: https://doi.org/10.2475/ajs.s3-9.52.279
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    On the age of the copper-bearing rocks of Lake Superior; and on the westward continuation of the Lake Superior synclinal
    Roland Duer Irving
    American Journal of Science July 1874, s3-8 (43) 46-56; DOI: https://doi.org/10.2475/ajs.s3-8.43.46
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    On the age of the lignitic formations of the Rocky Mountains
    Leo Lesquereux
    American Journal of Science June 1874, s3-7 (42) 546-557; DOI: https://doi.org/10.2475/ajs.s3-7.42.546
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    On the great lava-flood of the West; and on the structure and age of the Cascade mountains
    Joseph Le Conte
    American Journal of Science March 1874, s3-7 (39) 167-180; DOI: https://doi.org/10.2475/ajs.s3-7.39.167
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    On the age of the copper-bearing rocks of Lake Superior
    Thomas Benton Brooks and R. Pumpelly
    American Journal of Science June 1872, s3-3 (18) 428-432; DOI: https://doi.org/10.2475/ajs.s3-3.18.428
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    The density, rotation and relative age of the planets
    Gustavus Hinriches
    American Journal of Science January 1864, s2-37 (109) 36-56; DOI: https://doi.org/10.2475/ajs.s2-37.109.36
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    ... age of the red sandrock series of Vermont
    Elkanah Billings
    American Journal of Science May 1862, s2-33 (99) 370-376; DOI: https://doi.org/10.2475/ajs.s2-33.99.370
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    ...the age of the Quebec rocks
    William Edmond Logan
    American Journal of Science January 1862, s2-33 (97) 105-106; DOI: https://doi.org/10.2475/ajs.s2-33.97.105
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    Note on the probable age of the white limestone at Sussex and Franklin zinc mines, New Jersey
    George Hammell Cook
    American Journal of Science September 1861, s2-32 (95) 208-209; DOI: https://doi.org/10.2475/ajs.s2-32.95.208

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