Book contents
- Frontmatter
- Contents
- List of Contributors
- Preface
- The Proterozoic Biosphere
- PART I
- PART 2
- 14 Geographic and Geologic Data for PPRG Rock Samples
- 15 Flow Chart and Processing Procedures for Rock Samples
- 16 Procedures of Whole Rock and Kerogen Analysis
- 17 Abundances and Isotopic Compositions of Carbon and Sulfur Species in Whole Rock and Kerogen Samples
- 18 Procedures for Analysis of Extactable Organic Matter
- 19 Composition of Extractable Organic Matter
- 20 Modern Mat-Building Microbial Communities: Methods of Investigation and Supporting Data
- 21 Construction and Use of Geological, Geochemical, and Paleobiological Databases
- 22 Proterozoic and Selected Early Cambrian Microfossils and Microfossil-Like Objects
- 23 Described Taxa of Proterozoic and Selected Earliest Cambrian Carbonaceous Remains, Trace and Body Fossils
- 24 Atlas of Representative Proterozoic Microfossils
- 25 Informal Revised Classification of Proterozoic Microfossils
- 26 Models for Vendian-Cambrian Biotic Diversity and for Proterozoic Atmospheric and Ocean Chemistry
- 27 Glossary of Technical Terms
- References Cited
- Subject Index
- Index to Geologic Units
- Taxonomic Index
26 - Models for Vendian-Cambrian Biotic Diversity and for Proterozoic Atmospheric and Ocean Chemistry
Published online by Cambridge University Press: 04 April 2011
- Frontmatter
- Contents
- List of Contributors
- Preface
- The Proterozoic Biosphere
- PART I
- PART 2
- 14 Geographic and Geologic Data for PPRG Rock Samples
- 15 Flow Chart and Processing Procedures for Rock Samples
- 16 Procedures of Whole Rock and Kerogen Analysis
- 17 Abundances and Isotopic Compositions of Carbon and Sulfur Species in Whole Rock and Kerogen Samples
- 18 Procedures for Analysis of Extactable Organic Matter
- 19 Composition of Extractable Organic Matter
- 20 Modern Mat-Building Microbial Communities: Methods of Investigation and Supporting Data
- 21 Construction and Use of Geological, Geochemical, and Paleobiological Databases
- 22 Proterozoic and Selected Early Cambrian Microfossils and Microfossil-Like Objects
- 23 Described Taxa of Proterozoic and Selected Earliest Cambrian Carbonaceous Remains, Trace and Body Fossils
- 24 Atlas of Representative Proterozoic Microfossils
- 25 Informal Revised Classification of Proterozoic Microfossils
- 26 Models for Vendian-Cambrian Biotic Diversity and for Proterozoic Atmospheric and Ocean Chemistry
- 27 Glossary of Technical Terms
- References Cited
- Subject Index
- Index to Geologic Units
- Taxonomic Index
Summary
In Table 26.1, formally defined families and genera assessed to be of familial status are listed under a consensus classification to order, class, and phylum. Informal taxa are used for many problematica, and this classification may change considerably with new discoveries and insights into phylogenetic relationships. Problematical taxa followed in parentheses by an asterisk were treated as equivalent in rank to orders and classes in the analyses of diversity patterns in Section 11.4.
Stratigraphic ranges listed in Table 26.1 represent “best guesses,” especially for the Lower Cambrian, and may change as global correlation becomes more accurate. The units employed represent an attempt to standardize stratigraphy to the Siberian sequence for the Lower Cambrian and to the North American cratonic sequence for the Upper Cambrian. Abbreviations for stratigraphic units are as follows: “V” = Vendian; “Cm” = Cambrian; “Edia” = Ediacaran (upper Vendian); “N-Da” = Nemakit-Daldyn (uppermost Vendian); “Tomm” = Tommotian; “Atda” = Atdabanian; “Boto” = Botomian; “1Mid” = lower Middle Cambrian (as defined in Sepkoski 1979); “mMid” = middle Middle Cambrian; “uMid” = upper Middle Cambrian; “Dres” = Dresbachian; “Fran” = Franconian; “Trep” = Trempealeauan; “1” = lower; “u” = upper. Other stratigraphic abbreviations are as defined in Sepkoski (1982).
Table 26.2 summarizes the time scale used in Section 11.4 in plotting diversity patterns for Vendian-Cambrian metazoans and metaphytes.
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- The Proterozoic BiosphereA Multidisciplinary Study, pp. 1169 - 1188Publisher: Cambridge University PressPrint publication year: 1992