lower Paleozoic

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Note on the age of Swedish Paradoxides beds
S. W. Ford

American Journal of Science December 1886, s3-32 (192) 473-476; DOI: https://doi.org/10.2475/ajs.s3-32.192.473
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Modes of occurrence of the diamond in Brazil
Orville A. Derby

American Journal of Science July 1882, s3-24 (139) 34-42; DOI: https://doi.org/10.2475/ajs.s3-24.139.34
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On the Hudson River age of the Taconic schists
James D. Dana

American Journal of Science July 1879, s3-18 (103) 61-64; DOI: https://doi.org/10.2475/ajs.s3-18.103.61
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Amazonian drift
C. F. Hartt

American Journal of Science April 1871, s3-1 (4) 294-296; DOI: https://doi.org/10.2475/ajs.s3-1.4.294
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On the rocks of the Quebec Group at Point Levis
William E. Logan

American Journal of Science November 1863, s2-36 (108) 366-377; DOI: https://doi.org/10.2475/ajs.s2-36.108.366

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