Geology of the lower Amazon region / Charles Schuchert.

  • Schuchert, Charles, 1858-1942.
Date:
[1906]
Catalogue details

Licence: In copyright

Credit: Geology of the lower Amazon region / Charles Schuchert. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    CHARLES SCHUCHERT Dr. Katzer has shown remarkable ability in writing local geologi- cal treatises of a comprehensive nature. His largest and best work is The Geology of Bohemia; and the smallest, The Geology of Bosnia. The present admirable memoir under review is the third one of his local summaries. All are written in the German language. Much of Dr. Katzcr’s knowledge of the geology of Brazil (more especially of Para) was obtained during the seven years he was state geologist and stationed in the Museu Paraense; yet it is quite evident that he is also familiar with the literature, in many languages, treating of the geology of South America. The present article chiefly calls attention to the general geological sequence in the lower Amazon region. Those desiring further information must consult the Grundziige itself. The succeeding pages give, in the language of the reviewer, a con- densation of the chapter entitled, “The Geological Development of the Lower Amazon Region” (pp. 237-62). Following this statement, the present writer wall take up the Paleozoic formations in more detail, especially those of the Devonic. PART I. KATZER’S SUMMARY OF AMAZONIAN PALEO- GEOGRAPHY Katzer states that the general observation, that the present rela- tion of the Atlantic Ocean to Brazil was the same in the older geologi- cal epochs—i. e., that the old oceans spread upon the land from the east—is not supported by the facts. The distribution of the Archean shows that in the north and east occur the oldest rocks of the lower Amazon region. Upon these rest fresh-water deposits of Tertiary and Quaternary age. The 'This paper is largely based on Friederich Katzer’s Grundziige der Geologic des unteren Amazonasgebietes (des Staates Pard in Brasilien) (Leipzig, 1903; pp. 298, a geological map, numerous text-figures, and 16 plates of fossils; 8vo). The writings of Hartt, Rathbun, Derby, and Clarke have also been hberally drawn on.