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A Geognostical Essay on the Superposition of Rocks (Classic Reprint): In Both Hemispheres: In Both Hemispheres (Classic Reprint) - Tapa blanda

Humboldt, Alexandre De

 
9781334487200: A Geognostical Essay on the Superposition of Rocks (Classic Reprint): In Both Hemispheres: In Both Hemispheres (Classic Reprint)

Sinopsis

Unearth how rocks tell the story of the earth from Mexico to Hungary. This edition presents a clear view of how geognostic ideas describe the layering and movement of rocks, using concrete examples from classic field notes.

The pages reveal how geologists observe the order and relationship of rock formations, focusing on porphyries, clay-slate, and transitional rocks. It shows how careful noting of position, not just composition, builds a picture of Earth's history across hemispheres.


  • How porphyries and clay-slate relate in different regions, including Mexico and Europe.

  • Examples of rock notations and how simple symbols can describe complex formations.

  • Regional case studies, such as Guanaxuato and the Hungarian rock districts, with practical observations.

  • A framework for thinking about earth layers across primitive, intermediary, secondary, and tertiary formations.



Ideal for readers of geology, history of science, and anyone curious about how field observations shape our understanding of the planet.

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Reseña del editor

Excerpt from A Geognostical Essay on the Superposition of Rocks: In Both Hemispheres

It is already many years since I first announced the table Of positions which I now publish. The hesitation with which it is usual to proceed to the printing of a work long expected, would perhaps have still farther retarded this publication, had I not been compelled to it by the duties of friendship.

About the Publisher

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This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.

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