Neoproterozoic Geobiology and Paleobiology by Shuhai Xiao, Alan J. Kaufman PDF

By Shuhai Xiao, Alan J. Kaufman

ISBN-10: 1402052014

ISBN-13: 9781402052019

The Neoproterozoic period (1000–542 million years in the past) has turn into a huge concentration of geobiological investigations since it is a geological interval characterised via dramatic climatic swap and critical evolutionary ideas. Repeated glaciations of surprising importance happened all through this tumultuous period, and diverse eukaryotic clades independently accomplished multicellularity, changing into extra advanced, considerable, and numerous at its termination. Animals made their first debut within the Neoproterozoic too.

This quantity provides a pattern of perspectives and visions between a few of the transforming into numbers of Neoproterozoic staff. It contains a set of multidisciplinary experiences at the Neoproterozoic fossil checklist (animals, algae, acritarchs, protists, and hint fossils), evolutionary developmental biology of animals, molecular clock estimates of phylogenetic divergences, and Neoproterozoic chemostratigraphy and sedimentary geology. those issues are of continuous curiosity to geoscientists and bioscientists who're intrigued via the deep heritage of the Earth and its inhabitants.

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53 ___________________________________________________________________________ 23 S. J. ), Neoproterozoic Geobiology and Paleobiology, 23–56. © 2006 Springer. 24 1. J. W. HUNTLEY ET AL. INTRODUCTION Acritarchs, a group of decay-resistant organic-walled vesicular microfossils, dominate the fossil record of Proterozoic (2500–542 Ma) and Cambrian (542–488 Ma) protists. Most acritarchs from the Proterozoic and Paleozoic are interpreted as unicelled photosynthetic protists, though some may represent multicellular algae (Mendelson, 1987; Butterfield, 2004), and a few have been tentatively interpreted as fungi (Butterfield, 2005).

53 ___________________________________________________________________________ 23 S. J. ), Neoproterozoic Geobiology and Paleobiology, 23–56. © 2006 Springer. 24 1. J. W. HUNTLEY ET AL. INTRODUCTION Acritarchs, a group of decay-resistant organic-walled vesicular microfossils, dominate the fossil record of Proterozoic (2500–542 Ma) and Cambrian (542–488 Ma) protists. Most acritarchs from the Proterozoic and Paleozoic are interpreted as unicelled photosynthetic protists, though some may represent multicellular algae (Mendelson, 1987; Butterfield, 2004), and a few have been tentatively interpreted as fungi (Butterfield, 2005).

91–114. Brocks, J. , Logan, G. , and Summons, R. 45 billion-year-old Mount Bruce 16 S. M. PORTER Supergroup, Pilbara Craton, Western Australia, Geochim. Cosmochim. Acta 67: 4289– 4319. Brocks, J. , Summons, R. , and Logan, G. 45 billion-yearold Mount Bruce Supergroup, Hamersley Basin, Western Australia, Geochim. Cosmochim. Acta 67: 4321–4335. Brocks, J. , Love, G. , Summons, R. , Logan, G. A, Bowden, S. , 2005, Biomarker evidence for green and purple sulfur bacteria in a stratified Palaeoproterozoic sea, Nature 437: 866–870.

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Neoproterozoic Geobiology and Paleobiology by Shuhai Xiao, Alan J. Kaufman


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