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OriginsThe Search for Our Prehistoric Past$
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Frank H. T. Rhodes

Print publication date: 2016

Print ISBN-13: 9781501702440

Published to Cornell Scholarship Online: January 2017

DOI: 10.7591/cornell/9781501702440.001.0001

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Spineless Wonders

Spineless Wonders

Chapter:
(p.56) 5 Spineless Wonders
Source:
Origins
Author(s):

Frank H. T. Rhodes

Publisher:
Cornell University Press
DOI:10.7591/cornell/9781501702440.003.0005

This chapter focuses on the invertebrates—on whom the whole bio-economy of our planet depends. These creatures exist in countless numbers and represent a dazzling variety of different forms and form a critical link—not only in the food chain but also in the long history of life. Thus the chapter begins by mapping the geologic history of the invertebrates, represented by body fossils, traces of activity on sedimentary rocks, and the chemical signatures of rocks. It then goes on to describe half a dozen or so invertebrate groups that are most common in both living and fossil forms: sponges, coelenterates, mollusks, worms, echinoderms, brachiopods, and arthropods.

Keywords:   invertebrates, bacteria, geologic history, body fossils, sedimentary rocks, chemical signatures, invertebrate groups, bio-economy

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