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Ediacaran) of Earth – Nature’S Experiments
The Early Animals (Ediacaran) of Earth – Nature’s Experiments Donald Baumgartner Medical Entomologist, Biologist, and Fossil Enthusiast Presentation before Chicago Rocks and Mineral Society May 10, 2014 Illinois Famous for Pennsylvanian Fossils 3 In the Beginning: The Big Bang . Earth formed 4.6 billion years ago Fossil Record Order 95% of higher taxa: Random plant divisions domains & kingdoms Cambrian Atdabanian Fauna Vendian Tommotian Fauna Ediacaran Fauna protists Proterozoic algae McConnell (Baptist)College Pre C - Fossil Order Archaean bacteria Source: Truett Kurt Wise The First Cells . 3.8 billion years ago, oxygen levels in atmosphere and seas were low • Early prokaryotic cells probably were anaerobic • Stromatolites . Divergence separated bacteria from ancestors of archaeans and eukaryotes Stromatolites Dominated the Earth Stromatolites of cyanobacteria ruled the Earth from 3.8 b.y. to 600 m. [2.5 b.y.]. Believed that Earth glaciations are correlated with great demise of stromatolites world-wide. 8 The Oxygen Atmosphere . Cyanobacteria evolved an oxygen-releasing, noncyclic pathway of photosynthesis • Changed Earth’s atmosphere . Increased oxygen favored aerobic respiration Early Multi-Cellular Life Was Born Eosphaera & Kakabekia at 2 b.y in Canada Gunflint Chert 11 Earliest Multi-Cellular Metazoan Life (1) Alga Eukaryote Grypania of MI at 1.85 b.y. MI fossil outcrop 12 Earliest Multi-Cellular Metazoan Life (2) Beads Horodyskia of MT and Aust. at 1.5 b.y. thought to be algae 13 Source: Fedonkin et al. 2007 Rise of Animals Tappania Fungus at 1.5 b.y Described now from China, Russia, Canada, India, & Australia 14 Earliest Multi-Cellular Metazoan Animals (3) Worm-like Parmia of N.E. -
Contributions to the Neoproterozoic Geobiology
Contributions to the Neoproterozoic Geobiology Bing Shen Dissertation submitted to the faculty of the Virginia Polytechnic Institute and State University in partial fulfillment of the requirements for the degree of Doctor of Philosophy In Department of Geosciences Shuhai Xiao (Chair) Robert Bodnar Michal Kowalewski J. Fred Read November 29, 2007 Blacksburg, Virginia Key words: Neoproterozoic, Ediacaran, Ediacara fossils, China, Disparity, Sulfur isotope, Carbon isotope Copyright 2007, Bing Shen Contributions to the Neoproterozoic Geobiology Bing Shen Abstract This thesis makes several contributions to improve our understanding of the Neoproterozoic Paleobiology. In chapter 1, a comprehensive quantitative analysis of the Ediacara fossils indicates that the oldest Ediacara assemblage—the Avalon assemblage— already encompassed the full range of Ediacara morphospace. A comparable morphospace range was occupied by the subsequent White Sea and Nama assemblages, although it was populated differently. In contrast, taxonomic richness increased in the White Sea assemblage and declined in the Nama assemblage. The Avalon morphospace expansion mirrors the Cambrian explosion, and both may reflect similar underlying mechanisms. Chapter 2 describes problematic macrofossils collected from the Neoproterozoic slate of the upper Zhengmuguan Formation in North China and sandstone of the Zhoujieshan Formation in Chaidam. Some of these fossils were previously interpreted as animal traces. Our study of these fossils recognizes four genera and five species. None of these taxa can be interpreted as animal traces. Instead, they are problematic body fossils of unresolved phylogenetic affinities. Chapter 3 reports stable isotopes of the Zhamoketi cap dolostone atop the Tereeken diamictite in the Quruqtagh area, eastern Chinese Tianshan. Our new data indicate that carbonate associated sulfate (CAS) abundance decreases rapidly in the basal 34 cap dolostone and δ SCAS composition varies between +9‰ and +15‰ in the lower 2.5 34 m. -
Contributions in BIOLOGY and GEOLOGY
MILWAUKEE PUBLIC MUSEUM Contributions In BIOLOGY and GEOLOGY Number 51 November 29, 1982 A Compendium of Fossil Marine Families J. John Sepkoski, Jr. MILWAUKEE PUBLIC MUSEUM Contributions in BIOLOGY and GEOLOGY Number 51 November 29, 1982 A COMPENDIUM OF FOSSIL MARINE FAMILIES J. JOHN SEPKOSKI, JR. Department of the Geophysical Sciences University of Chicago REVIEWERS FOR THIS PUBLICATION: Robert Gernant, University of Wisconsin-Milwaukee David M. Raup, Field Museum of Natural History Frederick R. Schram, San Diego Natural History Museum Peter M. Sheehan, Milwaukee Public Museum ISBN 0-893260-081-9 Milwaukee Public Museum Press Published by the Order of the Board of Trustees CONTENTS Abstract ---- ---------- -- - ----------------------- 2 Introduction -- --- -- ------ - - - ------- - ----------- - - - 2 Compendium ----------------------------- -- ------ 6 Protozoa ----- - ------- - - - -- -- - -------- - ------ - 6 Porifera------------- --- ---------------------- 9 Archaeocyatha -- - ------ - ------ - - -- ---------- - - - - 14 Coelenterata -- - -- --- -- - - -- - - - - -- - -- - -- - - -- -- - -- 17 Platyhelminthes - - -- - - - -- - - -- - -- - -- - -- -- --- - - - - - - 24 Rhynchocoela - ---- - - - - ---- --- ---- - - ----------- - 24 Priapulida ------ ---- - - - - -- - - -- - ------ - -- ------ 24 Nematoda - -- - --- --- -- - -- --- - -- --- ---- -- - - -- -- 24 Mollusca ------------- --- --------------- ------ 24 Sipunculida ---------- --- ------------ ---- -- --- - 46 Echiurida ------ - --- - - - - - --- --- - -- --- - -- - - --- -
Back Matter (PDF)
Index Acraman impact ejecta layer 53–4, 117, 123, 126–9, Aspidella 130–2, 425–7 controversy 300, 301–3, 305 acritarchs ecology 303 Amadeus and Officer Basins 119 synonyms 302 biostratigraphy 115–25, 130–2 Australia Australian correlations 130–2 Acraman impact ejecta layer 53–4, 117, 123, 126–9, composite zonation scheme 119, 131, 132 130–2, 425–7 India 318–20 carbon isotope chemostratigraphy 126–9 Ireland 289 correlations of Ediacaran System and Period 18, Spain 232 115–35 sphaeromorphid 324 Marinoan glaciation 53–4, 126 Adelaide, Hallett Cove 68 Australia, Ediacaran System and Period Adelaide Rift Complex 115–22, 425 Bunyeroo–Wonoka Formation transition correlations with Officer Basin 127 137–9, 426 dating (Sr–Rb) 140 Centralian Superbasin 118, 125 generalized time–space diagram, correlations composite zonation scheme 131 between tectonic units 120 correlation methods and results 125–32 location maps 116, 118 time–space diagram 120 SE sector cumulative strata thickness 139 Vendian climatic indicators 17 stratigraphic correlation with Officer Basin 127 See also Adelaide Rift Complex; Flinders Ranges Stuart Shelf drill holes, correlations 117 Avalonian assemblages, Newfoundland 237–57, Sturtian (Umberatana) Group 116, 138 303–7, 427 Umberatana Group 116, 138 Africa backarc spreading, Altenfeld Formation 44–5, 47–8 Vendian climatic indicators 17 Baliana–Krol Group, NW Himalaya 319 see also Namibia Barut Formation, Iran 434 Aldanellidae 418 Bayesian analysis algal metaphyta, White Sea Region 271–4 eumetazoans 357–9 algal microfossils, White -
Retallack 2014 Newfoundland Ediacaran
Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Geological Society of America Bulletin Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J. Retallack Geological Society of America Bulletin 2014;126, no. 5-6;619-638 doi: 10.1130/B30892.1 Email alerting services click www.gsapubs.org/cgi/alerts to receive free e-mail alerts when new articles cite this article Subscribe click www.gsapubs.org/subscriptions/ to subscribe to Geological Society of America Bulletin Permission request click http://www.geosociety.org/pubs/copyrt.htm#gsa to contact GSA Copyright not claimed on content prepared wholly by U.S. government employees within scope of their employment. Individual scientists are hereby granted permission, without fees or further requests to GSA, to use a single figure, a single table, and/or a brief paragraph of text in subsequent works and to make unlimited copies of items in GSA's journals for noncommercial use in classrooms to further education and science. This file may not be posted to any Web site, but authors may post the abstracts only of their articles on their own or their organization's Web site providing the posting includes a reference to the article's full citation. GSA provides this and other forums for the presentation of diverse opinions and positions by scientists worldwide, regardless of their race, citizenship, gender, religion, or political viewpoint. Opinions presented in this publication do not reflect official positions of the Society. Notes © 2014 Geological Society of America Downloaded from gsabulletin.gsapubs.org on May 2, 2014 Volcanosedimentary paleoenvironments of Ediacaran fossils in Newfoundland Gregory J. -
A Solution to Darwin's Dilemma: Differential Taphonomy of Ediacaran and Palaeozoic Non-Mineralised Discoidal Fossils
Provided by the author(s) and NUI Galway in accordance with publisher policies. Please cite the published version when available. Title A Solution to Darwin's Dilemma: Differential Taphonomy of Ediacaran and Palaeozoic Non-Mineralised Discoidal Fossils Author(s) MacGabhann, Breandán Anraoi Publication Date 2012-08-29 Item record http://hdl.handle.net/10379/3406 Downloaded 2021-09-26T20:57:04Z Some rights reserved. For more information, please see the item record link above. A Solution to Darwin’s Dilemma: Differential taphonomy of Palaeozoic and Ediacaran non- mineralised discoidal fossils Volume 1 of 2 Breandán Anraoi MacGabhann Supervisor: Dr. John Murray Earth and Ocean Sciences, School of Natural Sciences, NUI Galway August 2012 Differential taphonomy of Palaeozoic and Ediacaran non-mineralised fossils Table of Contents List of Figures ........................................................................................................... ix List of Tables ........................................................................................................... xxi Taxonomic Statement ........................................................................................... xxiii Acknowledgements ................................................................................................ xxv Abstract ................................................................................................................. xxix 1. Darwin’s Dilemma ............................................................................................... -
New Ediacara Fossils Preserved in Marine Limestone and Their Ecological Implications
OPEN New Ediacara fossils preserved in SUBJECT AREAS: marine limestone and their ecological PALAEONTOLOGY GEOLOGY implications Zhe Chen1, Chuanming Zhou1, Shuhai Xiao2, Wei Wang1, Chengguo Guan1, Hong Hua3 & Xunlai Yuan1 Received 22 November 2013 1LPS and LESP, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China, Accepted 2Department of Geosciences, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA, 3State Key Laboratory 7 February 2014 of Continental Dynamics and Department of Geology, Northwest University, Xi’an 710069, China. Published 25 February 2014 Ediacara fossils are central to our understanding of animal evolution on the eve of the Cambrian explosion, because some of them likely represent stem-group marine animals. However, some of the iconic Ediacara fossils have also been interpreted as terrestrial lichens or microbial colonies. Our ability to test these hypotheses is limited by a taphonomic bias that most Ediacara fossils are preserved in sandstones and Correspondence and siltstones. Here we report several iconic Ediacara fossils and an annulated tubular fossil (reconstructed as an requests for materials erect epibenthic organism with uniserial arranged modular units), from marine limestone of the 551– should be addressed to 541 Ma Dengying Formation in South China. These fossils significantly expand the ecological ranges of Z.C. (zhechen@ several key Ediacara taxa and support that they are marine organisms rather than terrestrial lichens or nigpas.ac.cn) or microbial colonies. Their close association with abundant bilaterian burrows also indicates that they could tolerate and may have survived moderate levels of bioturbation. S.H.X. ([email protected]) he Ediacara biota, exemplified by fossils preserved in the Ediacara Member of South Australia, provides key information about the origin, diversification, and disappearance of a distinct group of soft-bodied, mac- T roscopic organisms on the eve of the Cambrian diversification of marine animals1–3. -
Of Time and Taphonomy: Preservation in the Ediacaran
See discussions, stats, and author profiles for this publication at: http://www.researchgate.net/publication/273127997 Of time and taphonomy: preservation in the Ediacaran CHAPTER · JANUARY 2014 READS 36 2 AUTHORS, INCLUDING: Charlotte Kenchington University of Cambridge 5 PUBLICATIONS 2 CITATIONS SEE PROFILE Available from: Charlotte Kenchington Retrieved on: 02 October 2015 ! OF TIME AND TAPHONOMY: PRESERVATION IN THE EDIACARAN CHARLOTTE G. KENCHINGTON! 1,2 AND PHILIP R. WILBY2 1Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge, CB2 3EQ, UK <[email protected]! > 2British Geological Survey, Keyworth, Nottingham, NG12 5GG, UK ABSTRACT.—The late Neoproterozoic witnessed a revolution in the history of life: the transition from a microbial world to the one known today. The enigmatic organisms of the Ediacaran hold the key to understanding the early evolution of metazoans and their ecology, and thus the basis of Phanerozoic life. Crucial to interpreting the information they divulge is a thorough understanding of their taphonomy: what is preserved, how it is preserved, and also what is not preserved. Fortunately, this Period is also recognized for its abundance of soft-tissue preservation, which is viewed through a wide variety of taphonomic windows. Some of these, such as pyritization and carbonaceous compression, are also present throughout the Phanerozoic, but the abundance and variety of moldic preservation of body fossils in siliciclastic settings is unique to the Ediacaran. In rare cases, one organism is preserved in several preservational styles which, in conjunction with an increased understanding of the taphonomic processes involved in each style, allow confident interpretations of aspects of the biology and ecology of the organisms preserved. -
Outline 11: Fossil Record of Early Life Life in the Precambrian Time Line
Outline 11: Fossil Record of Early Life Life in the Precambrian Time Line • 0.545 BY – animals with hard parts, start of the Phanerozoic Eon • 0.600 BY – first animals, no hard parts • 2.0 BY – first definite eukaryotes • 2.0-3.5 BY – formation of BIF’s, stromatolites common • 3.5 BY – oldest definite fossils: stromatolites • 3.8 BY – C12 enrichment in sedimentary rocks, chemical evidence for life; not definitive of life • 4.0 BY – oldest rocks of sedimentary origin Fossil Evidence • 3.8 BY ago: small carbon compound spheres - early cells? Maybe not. • 3.5 BY ago: definite fossils consisting of stromatolites and the cyanobacteria that formed them. The cyanobacteria resemble living aerobic photosynthesizers. • 3.2 BY ago: rod-shaped bacteria Fossil Cell? 3.8 BY old from Greenland Modern stromatolites, Bahamas Modern stromatolites produced by cyanobacteria, Sharks Bay, Australia Modern stromatolites produced by cyanobacteria, Sharks Bay, Australia 2 B.Y. old stromatolites from NW Canada Stromatolites, 2 BY old, Minnesota Cyanobacteria, makers of stromatolites Microscopic views Cyanobacteria, makers of stromatolites 1.0 BY old Cyanobacteria 3.5 BY old, Australia Microscopic views Stromatolite, 3.5 BY old, Australia Closeup of stromatolite layers in last slide Modern archaea Fossil archaea or bacteria, 3.2 BY old from Africa Fossil bacteria 2BY Modern bacteria old from Minnesota The Banded Iron Formations • Billions of tons of iron ore, the world’s chief reserves. • Formed between 3.5 and 2.0 BY ago. • They record the gradual oxidation of the oceans by photosynthetic cyanobacteria. • When the oceans finished rusting, oxygen accumulated in the atmosphere. -
Fossil Record of Early Life
Origin of Life on Earth: The Precambrian Fossil Record Geology 230 Fossils and Evolution Time Line • 0.55 BY – animals with hard parts, start of the Phanerozoic Era • 2.0 BY – first definite eukaryotes • 2.0-3.5 BY – formation of BIF’s, stromatolites common • 3.5 BY – oldest probable fossils: stromatolites • 3.8 BY – C12 enrichment in sedimentary rocks, chemical evidence for life; not definitive of life • 4.0 BY – oldest rocks of sedimentary origin Fossil Evidence • 3.8 BY ago: small carbon compound spheres - early cells? • 3.5 BY ago: probable fossils consisting of stromatolites and the microbes that formed them. • 3.2 BY ago: rod-shaped bacteria Fossil Cell? 3.8 BY old from Greenland Modern stromatolites, Bahamas Modern stromatolites produced by cyanobacteria, Sharks Bay, Australia Modern stromatolites produced by cyanobacteria, Sharks Bay, Australia 2 B.Y. old stromatolites from Canada Stromatolites, 2 BY old, Minnesota Cyanobacteria, makers of stromatolites since 2.6 Ga Microscopic views Cyanobacteria, makers of stromatolites 1.0 Ga Cyanobacteria fossils, 1 BY old Microscopic views 3.5 BY old Australia, cyanobacteria or not? Microscopic views Stromatolite, 3.5 BY old, Australia Closeup of stromatolite layers in last slide Modern archaea Fossil archaea or bacteria, 3.2 BY old from Africa Fossil bacteria 2BY Modern bacteria old from Minnesota The Banded Iron Formations • Billions of tons of iron ore, the world’s chief reserves. • Formed between 3.5 and 2.0 BY ago. • They record the gradual oxidation of the oceans by photosynthetic cyanobacteria. • When the oceans finished rusting, oxygen accumulated in the atmosphere. -
Mistaken Point Ecological Reserve Management Plan
Mistaken Point Ecological Reserve Management Plan MISTAKEN POINT Ecological Reserve Management Plan Parks and Natural Areas Division Department of Environment and Conservation Mistaken Point Ecological Reserve Management Plan Recommended Citation: Government of Newfoundland and Labrador. 2009. Mistaken Point Ecological Reserve Management Plan. Parks and Natural Areas Division, Department of Environment and Conservation, Deer Lake, NL. 26 pp. For more information about Mistaken Point Ecological Reserve: Parks and Natural Areas Division Department of Environment and Conservation Government of Newfoundland and Labrador 33 Reid’s Lane, Deer Lake Newfoundland and Labrador A8A 2A3 Phone: 709.635.4520 Fax: 709.635.4541 Website: www.gov.nl.ca/parks Email: [email protected] March 2009 Management Plan prepared by: Richard Thomas, Erika Pittman, Siân French, Sean Greene, Jeri Graham, Tina Leonard, Doug Boyce, Dave Elliott and Valerie Sullivan Photo credits: Parks and Natural Areas Division (PNAD), Erika Pittman (unless otherwise noted) Mistaken Point Ecological Reserve Management Plan Foreword Newfoundland and Labrador’s protected areas are special places. They preserve examples of woodland caribou herds, diverse seabird colonies, globally important fossil sites, endangered and threatened plants and animals, and globally rare habitats. Our protected areas provide natural venues for scientifi c research, education, and enjoyment for current and future generations. Parks and Natural Areas Division of the Department of Environment and Conservation -
Invertebrates - Advanced
Invertebrates - Advanced Douglas Wilkin, Ph.D. Jennifer Blanchette Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) AUTHORS Douglas Wilkin, Ph.D. To access a customizable version of this book, as well as other Jennifer Blanchette interactive content, visit www.ck12.org EDITOR Douglas Wilkin, Ph.D. CK-12 Foundation is a non-profit organization with a mission to reduce the cost of textbook materials for the K-12 market both in the U.S. and worldwide. Using an open-source, collaborative, and web-based compilation model, CK-12 pioneers and promotes the creation and distribution of high-quality, adaptive online textbooks that can be mixed, modified and printed (i.e., the FlexBook® textbooks). Copyright © 2016 CK-12 Foundation, www.ck12.org The names “CK-12” and “CK12” and associated logos and the terms “FlexBook®” and “FlexBook Platform®” (collectively “CK-12 Marks”) are trademarks and service marks of CK-12 Foundation and are protected by federal, state, and international laws. Any form of reproduction of this book in any format or medium, in whole or in sections must include the referral attribution link http://www.ck12.org/saythanks (placed in a visible location) in addition to the following terms. Except as otherwise noted, all CK-12 Content (including CK-12 Curriculum Material) is made available to Users in accordance with the Creative Commons Attribution-Non-Commercial 3.0 Unported (CC BY-NC 3.0) License (http://creativecommons.org/ licenses/by-nc/3.0/), as amended and updated by Creative Com- mons from time to time (the “CC License”), which is incorporated herein by this reference.