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Geological Observations on South America

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Excerpt: ...of one specimen in the direction of the medullary rays has, as I am informed by Mr. R. Brown, the discs in a double row placed alternately, and not opposite as in the true Araucaria. I found marine remains only in one spot, in some concretions of hard calcareous sandstone: in several other districts I have observed that organic remains were exclusively confined to such concretions; are we to account for this fact, by the supposition that the shells lived only at these points, or is it not more probable that ...

Geological Observations on South America 2016, Createspace Independent Publishing Platform

ISBN-13: 9781535032247

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Geological Observations on South America 2015, Createspace

ISBN-13: 9781511711326

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Geological Observations on South America 2013, Createspace

ISBN-13: 9781489582072

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Geological Observations on South America 2013, Tredition Classics

ISBN-13: 9783849192303

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Geological Observations on South America 2013, Tredition Classics

ISBN-13: 9783849501129

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Geological Observations on South America 2012, Createspace Independent Publishing Platform

ISBN-13: 9781478123514

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Geological Observations on South America 2008, BiblioLife, Charleston SC

ISBN-13: 9781434669773

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Geological Observations on South America 2008, BiblioLife, Charleston SC

ISBN-13: 9780554384320

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Geological Observations on South America 2008, BiblioLife, Charleston SC

ISBN-13: 9780554291291

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Geological Observations on South America 2008, BiblioLife, Charleston SC

ISBN-13: 9781434669766

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Geological Observations on South America 2004, IndyPublish.com, Cambridge MA

ISBN-13: 9781414216409

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