American Journal of Science: s4-50 (300)

Index by author

December 01, 1920; Volume s4-50,Issue 300

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The nature of Paleozoic crustal instability in eastern North America
Charles Schuchert

American Journal of Science December 1920, s4-50 (300) 399-414; DOI: https://doi.org/10.2475/ajs.s4-50.300.399
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Notes on the Tertiary intrusives of the lower Pecos Valley, New Mexico
Douglas Ramsay Semmes

American Journal of Science December 1920, s4-50 (300) 415-430; DOI: https://doi.org/10.2475/ajs.s4-50.300.415
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Entelodonts in the Marsh Collection
E. L. Troxell

American Journal of Science December 1920, s4-50 (300) 431-445; DOI: https://doi.org/10.2475/ajs.s4-50.300.431
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The rhyolites of Lipari
H. S. Washington

American Journal of Science December 1920, s4-50 (300) 446-462; DOI: https://doi.org/10.2475/ajs.s4-50.300.446