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Excerpt from A Monograph of the British Stromatoporoids The Singular extinct organisms of which the genus St1'omat0pom, Goldfuss, is the central type, and which we may conveniently speak of by the general name of the Stromatoporoids, constitute a great group of fossil Invertebrates, which are specially characteristic of the Ordovician, Silurian, and Devonian formations, if not absolutely confined to strata belonging to these periods. Possessing a calca reous skeleton, and often attaining to very considerable dimensions, they enter very extensively into the formation of many of the older Palaeozoic limestones. Abundant as they are in the Silurian and Devonian deposits of various regions, the investigation of their structure is attended with peculiar difficulties and it is not therefore surprising to find that the most diverse views have been entertained as to their nature and zoological relationships. The groups to one or other of which they have been most commonly referred are the Sponges, the Foraminifera, the Corals, and the Hydrozoa. The results, however, of the most recent investi gations, render it hardly a matter of doubt that they are truly referable to the Hydrozoa, and that they are more or less closely related to the Hydrocorallines on the one hand, and to the Hydractinit'dce on the other. The general progress of scientific research as regards the Stromatoporoids will, however, be best gathered from the following brief historical summary. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com 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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Zařazení knihy Knihy v angličtině Earth sciences, geography, environment, planning Earth sciences Palaeontology

• Plný název: A Monograph of the British Stromatoporoids (Classic Reprint)
• Autor: H. Alleyne Nicholson
• Jazyk: Angličtina
• Vazba: Brožovaná
• Počet stran: 382
• EAN: 9781333406400
• ISBN: 1333406401
• ID: 14196341
• Nakladatelství: Forgotten Books
• Hmotnost: 511 g
• Rozměry: 229 × 152 × 20 mm
• Datum vydání: 30. August 2016

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