MM Iicc Hh Iigg Aa Nn FF Oo Ss Ss Iillss

Total Page:16

File Type:pdf, Size:1020Kb

MM Iicc Hh Iigg Aa Nn FF Oo Ss Ss Iillss MMiicchhiiggaann FFoossssiillss A2 - BRACHIOPOD, B2 - CRINOID pieces, B1 - CORAL or CHAIN invertebrate - A1 - BRACHIOPOD, invertebrate - CORAL, invertebrate - Mucrospifier profundus - invertebrate - Megistocrinus sp. ? - Halysites sp. - Cordell Silica formation - Pentamerus sp. - Cordell Alpena limestone - dolomite - Silurian age - Devonian age - dolomite - Silurian age - Devonian age - Alpena Chippewa Co. - 110 Washtenaw Co. - 50 Chippewa Co. - 65 mm, Co. - 30 mm (lower right) mm, siliceous mm, calcite internal cast or steinkern , calcite replacement - replacement - R. replacement - R. - R. Elowski GSD Milstein Milstein B4 - CORAL or A4 - CORAL or COLONIAL CORAL B3 - SNAIL or COLONIAL CORAL, A3 - TRILOBITE, Petoskey Stone, GASTROPOD, invertebrate - invertebrate - Phacops invertebrate - invertebrate - genus not Syringopora sp. - rana - Silica formation - Hexagonaria percarinata determined - Cordell Cordell dolomite - Devonian age - - Alpena Limestone - dolomite - Silurian age - Silurian age - Chippewa Washtenaw Co. - 70 mm, s Devonian age - Chippewa Co. - 75 mm, s Co. - 125 mm, siliceous calcite replacement - S. Charlevoix Co. - 200 mm, internal cast or l l replacement - R. Wilson calcite replacement - R. steinkern - GSD i i Milstein Milstein s s C2 - EUCARYOTIC D1 - BANDED IRON C1 - MASTODON Tooth, D2 - PLANT root section, algae filaments, plant - FORMATION (BIF), vertebrate - Mammut s plant - Stigmaria, genus s Grypania spiralis - from fossils - result of americanum - Glacial not determined - Negaunee Iron Grypania and others - deposit - Quaternary age Saginaw Formation - o Formation - Banded Iron Formation o - 200 mm long, the Pennsylvanian age - Precambrian age - - Precambrian age - “Michigan State Fossil” - Eaton Co. - 150 mm in Marquette Co. - large Marquette Co. - 600 Central Michigan F diameter, internal cast - F loop about 20 mm , mm- Eddy Discovery University Rowe T. Godbold oldest macrofossil - Center Museum GSD n n D3 - Kona Dolomite, C3 - FISH plate, D4 - ALGAL stromatolite, plant - Algal in origin - a vertebrate - genus not plant - Collenia undosa - a C4 - Septarian nodule - Kona Formation - determined - Alpena Copper Harbor pseudo fossil - - Ottawa Precambrian age - Limestone - Devonian g Conglomerate - g Co. - 75 mm, Looks like Marquette Co. - 150 by age - Alpena Co. - 200 Precambrian age, 1,100 - a fossil, it is not. - S. i 200 mm, i mm at widest point, Keweenawan Co. - 100 Wilson metamorphosed to a calcite replacement - S. mm, - S. Wilson marble - GSD Wilson h h c c E2 - CORAL or F2 - CLAM or F1 - BRYOZOAN, i i COLONIAL CORAL, E1 - CRINOID, PELECYPOD, invertebrate - invertebrate - Favosites invertebrate - invertebrate - Megalomus Sulcoretepora deissi - sp. - Alpena Limestone Megistocrinus concava - canadensis - Cordell Silica formation - - Devonian age - Thunder Bay limestone - dolomite - Silurian age - Devonian age - M M Charlevoix Co. - 100 Devonian age - Alpena Chippewa Co. - 60 x 75 Washtenaw Co. - 25 mm (shown), siliceous Co. - 30 mm, calcite mm, internal cast or mm, calcite replacement - R. replacement - S. Wilson steinkern - GSD replacement - S. Wilson Reszka F4 - E4 - CEPHALOPOD, E3 - BRACHIOPOD, F3 - CORAL or STROMATOPOROID, invertebrate - invertebrate - COLONIAL CORAL, invertebrate - genus not Michelinoceras sp. - Mucrospifler mucronatus invertebrate - Favosites determined - Alpena Ogontz limestone - - Silica formation - sp. - Cordell dolomite - Limestone - Devonian Ordovician age - Alger Devonian age - Silurian age - Chippewa age - Charlevoix Co. - Co. - 100 mm, internal Washtenaw Co. - 90 mm, Co. - 70 mm, siliceous 125 mm, calcite cast or steinkern - R. calcite replacement - R. replacement - GSD replacement - GSD Milstein Milstein .
Recommended publications
  • Algal Stromatolites in the Willow River Member of the Lower Ordovician Shakopee Formation Near Chatfield, Minnesota, USA
    The Compass: Earth Science Journal of Sigma Gamma Epsilon Volume 84 Issue 1 Article 6 1-6-2012 Algal Stromatolites in the Willow River Member of the Lower Ordovician Shakopee Formation near Chatfield, Minnesota, USA Sophia L. May College of St. Benedict / St. John's University, [email protected] Larry E. Davis College of St. Benedict / St. John's University, [email protected] David G. Brown College of St. Benedict / St. John's University, [email protected] Follow this and additional works at: https://digitalcommons.csbsju.edu/compass Part of the Paleontology Commons Recommended Citation May, Sophia L.; Davis, Larry E.; and Brown, David G. (2012) "Algal Stromatolites in the Willow River Member of the Lower Ordovician Shakopee Formation near Chatfield, Minnesota, USA," The Compass: Earth Science Journal of Sigma Gamma Epsilon: Vol. 84: Iss. 1, Article 6. Available at: https://digitalcommons.csbsju.edu/compass/vol84/iss1/6 This Article is brought to you for free and open access by DigitalCommons@CSB/SJU. It has been accepted for inclusion in The Compass: Earth Science Journal of Sigma Gamma Epsilon by an authorized editor of DigitalCommons@CSB/SJU. For more information, please contact [email protected]. ON THE OUTCROP Algal Stromatolites in the Willow River Member of the Lower Ordovician Shakopee Formation near Chatfield, Minnesota, USA Sophia L. May, Larry E. Davis, and David G. Brown Department of Biology College of Saint Benedict/Saint John’s University Collegeville, Minnesota, 56321 USA [email protected] LOCATION From the intersection of (Olmsted) Co. Hwy 2 and U.S. 52 Rochester I-90 (Main Street) in Chatfield, MN drive N south-southeast on U.S.
    [Show full text]
  • Appendix: Economic Geology: Exploration for Coal, Oil and Minerals
    Downloaded from http://mem.lyellcollection.org/ by guest on October 1, 2021 PART 4 Appendix: Economic geology: exploration for coal, oil and Glossary of stratigraphic names, 463 minerals, 449 References, 477 Index of place names, 455 General Index, 515 Alkahornet, a distinctive landmark on the northwest, entrance to Isfjorden, is formed of early Varanger carbonates. The view is from Trygghamna ('Safe Harbour') with CSE motorboats Salterella and Collenia by the shore, with good anchorage and easy access inland. Photo M. J. Hambrey, CSE (SP. 1561). Routine journeys to the fjords of north Spitsbergen and Nordaustlandet pass by the rocky coastline of northwest Spitsbergen. Here is a view of Smeerenburgbreen from Smeerenburgfjordenwhich affords some shelter being protected by outer islands. On one of these was Smeerenburg, the principal base for early whaling, hence the Dutch name for 'blubber town'. Photo N. I. Cox, CSE 1989. Downloaded from http://mem.lyellcollection.org/ by guest on October 1, 2021 The CSE motorboat Salterella in Liefdefjorden looking north towards Erikbreen with largely Devonian rocks in the background unconformably on metamorphic Proterozoic to the left. Photo P. W. Web, CSE 1989. Access to cliffs and a glacier route (up Hannabreen) often necessitates crossing blocky talus (here Devonian in foreground) and then possibly a pleasanter route up the moraine on to hard glacier ice. Moraine generally affords a useful introduction to the rocks to be traversed along the glacial margin. The dots in the sky are geese training their young to fly in V formation for their migration back to the UK at the end of the summer.
    [Show full text]
  • GEOLOGY THEME STUDY Page 1
    NATIONAL HISTORIC LANDMARKS Dr. Harry A. Butowsky GEOLOGY THEME STUDY Page 1 Geology National Historic Landmark Theme Study (Draft 1990) Introduction by Dr. Harry A. Butowsky Historian, History Division National Park Service, Washington, DC The Geology National Historic Landmark Theme Study represents the second phase of the National Park Service's thematic study of the history of American science. Phase one of this study, Astronomy and Astrophysics: A National Historic Landmark Theme Study was completed in l989. Subsequent phases of the science theme study will include the disciplines of biology, chemistry, mathematics, physics and other related sciences. The Science Theme Study is being completed by the National Historic Landmarks Survey of the National Park Service in compliance with the requirements of the Historic Sites Act of l935. The Historic Sites Act established "a national policy to preserve for public use historic sites, buildings and objects of national significance for the inspiration and benefit of the American people." Under the terms of the Act, the service is required to survey, study, protect, preserve, maintain, or operate nationally significant historic buildings, sites & objects. The National Historic Landmarks Survey of the National Park Service is charged with the responsibility of identifying America's nationally significant historic property. The survey meets this obligation through a comprehensive process involving thematic study of the facets of American History. In recent years, the survey has completed National Historic Landmark theme studies on topics as diverse as the American space program, World War II in the Pacific, the US Constitution, recreation in the United States and architecture in the National Parks.
    [Show full text]
  • Detection of Biosignatures in Million Years Old Fossils with the “Standoff Bio- Finder”
    49th Lunar and Planetary Science Conference 2018 (LPI Contrib. No. 2083) 2777.pdf DETECTION OF BIOSIGNATURES IN MILLION YEARS OLD FOSSILS WITH THE “STANDOFF BIO- FINDER”. T. E. Acosta-Maeda1, A. K. Misra1, M. Sandford1, S. K. Sharma1, D. Garmire2, and J. Porter1, 1Hawaiʻi Institute of Geophysics and Planetology, Univ. of Hawaiʻi at Mānoa, 1680 East-West Rd, Honolulu, Hawaiʻi, USA, 96822; 2Department of Electrical Engineering, Univ. of Hawaiʻi at Mānoa, Honolulu, HI 96822. [email protected]. Introduction: The “Standard Biofinder” has been developed at the University of Hawaiʻi with the intent of quickly locating biological materials in wide geolog- ical contexts in planetary exploration [1]. The Standoff Biofinder locates bio-fluorescent materials by taking live images that highlight the short lifetime fluorescence emitting objects [2]. Since its creation [3-5], the instru- ment has been proven to distinguish between mineral and biogenic fluorescence, work from standoff dis- tances (1-10 m) in daylight conditions with short meas- urement times (0.1s), and to differentiate between dif- ferent biogenic materials by taking color images. These capabilities could help an exploration rover identify ob- jects of interest for the ‘search for life’ beyond Earth and then dedicate other characterization techniques, such as Raman or LIBS, to determine the molecular and ele- mental composition of the selected targets. For this work, we used the “Color Biofinder” version of the in- strument [5] in combination with time-resolved fluores- cence measurements to assess its capabilities to detect and characterize fossils as biosignatures. Fossils are pre- served remains from biological entities from past geo- logical ages.
    [Show full text]
  • GEOLOGICALLY SPEAKING July 2020 Geologically Speaking
    GEOLOGICALLY SPEAKING July 2020 Geologically Speaking A Michigan Section AIPG Publication 1 GEOLOGICALLY SPEAKING July 2020 2 GEOLOGICALLY SPEAKING July 2020 Section Officers Table of Contents Geology Crossword #1 Solution 4 PRESIDENT From the President’s Desk 6 Sara Pearson, CPG Did You Know? 10 EGLE Tel. (517) 420-3219 Section Website Reminders 10 [email protected] Minerals for Sale 10 Where in Michigan? 13 Regulatory Roundup 15 VICE PRESIDENT Case Study: Bill Mitchell, CPG Overcoming Water Treatment Challenges for 1,4- EGLE Dioxane Using Ambersorb Resin 16 Tel. (269) 873-5549 [email protected] In Memoriam 18 Welcome New Members 19 Member’s Corner 19 TREASURER Interesting Geology Links 19 Mellisa Powers-Taylor Andrew Mozola Scholarship 22 EGLE Golf Outing Reminder 23 Tel. (517) 388-0795 [email protected] Geology in Michigan 25 ASBOG Exam Update 37 SECRETARY Member Input Sought 37 Kalan Briggs Support Our Sponsors 37 ARCADIS Annual Meeting Planning 38 Tel. (248) 635-4576 [email protected] Update Your Information 38 Coming Events 40 Geology Crossword #2 42 PAST PRESIDENT Golf Outing Registration 44 Amy Hoeksema, CPG Consumers Energy Tel. (517) 788-1985 [email protected] NEWSLETTER EDITOR Adam Heft, CPG WSP USA Tel. (517) 886-7400 [email protected] 3 GEOLOGICALLY SPEAKING July 2020 *This geology crossword appeared in the previous edition of Geologically Speaking. 4 GEOLOGICALLY SPEAKING July 2020 5 GEOLOGICALLY SPEAKING July 2020 From the President’s Desk Change is hard. How many times have we heard this available in this edition of Geologically Speaking. We statement? Countless. Is it an excuse or cliché for taking hope to see you there! We are re-planning our meeting at or not taking action? Perhaps it could be viewed this Eastern Michigan University and have invited our part- way? ners at the Michigan Association of Environmental Pro- fessionals to join us for this meeting.
    [Show full text]
  • Michigan Fossils - Student Worksheets – Larger Format – Page 1 of 6
    A1 - BRACHIOPOD, invertebrate - A2 - BRACHIOPOD, invertebrate - Pentamerus sp. - Cordell dolomite - Mucrospifier profundus - Silica formation Silurian age - Chippewa Co. - 65 mm, - Devonian age - Washtenaw Co. - 50 mm, internal cast or steinkern - R. Elowski calcite replacement - R. Milstein A3 - TRILOBITE, invertebrate - Phacops A4 - CORAL or COLONIAL CORAL, rana - Silica formation - Devonian age - invertebrate - Syringopora sp. - Cordell Washtenaw Co. - 70 mm, calcite dolomite - Silurian age - Chippewa Co. - replacement - S. Wilson 125 mm, siliceous replacement - R. Milstein Michigan Fossils - Student Worksheets – larger format – page 1 of 6 C1 - MASTODON Tooth, vertebrate - C2 - EUCARYOTIC algae filaments, plant - Mammut americanum - Glacial deposit - Grypania spiralis - Negaunee Iron Quaternary age - 200 mm long, the Formation - Precambrian age - Marquette “Michigan State Fossil” - Central Michigan Co. - large loop about 20 mm , oldest Univ. Rowe Museum macrofossil - GSD C3 - FISH plate, vertebrate - genus not C4 - Septarian nodule - pseudo fossil - - determined - Alpena Limestone - Devonian Ottawa Co. - 75 mm, Looks like a fossil, it age - Alpena Co. - 200 mm at widest point, is not. - S. Wilson calcite replacement - S. Wilson Michigan Fossils - Student Worksheets – larger format – page 2 of 6 E2 - CORAL or COLONIAL CORAL, E1 - CRINOID, invertebrate - Megistocrinus invertebrate - Favosites sp. - Alpena concava - Thunder Bay limestone - Devonian Limestone - Devonian age - Charlevoix Co. - age - Alpena Co. - 30 mm, calcite 100 mm (shown), siliceous replacement - R. replacement - S. Wilson Reszka E3 - BRACHIOPOD, invertebrate - E4 - CEPHALOPOD, invertebrate - Mucrospifler mucronatus - Silica formation - Michelinoceras sp. - Ogontz limestone - Devonian age - Washtenaw Co. - 90 mm, Ordovician age - Alger Co. - 100 mm, calcite replacement - R. Milstein internal cast or steinkern - R. Milstein Michigan Fossils - Student Worksheets – larger format – page 3 of 6 B1 - CORAL or CHAIN CORAL, B2 - CRINOID pieces, invertebrate - invertebrate - Halysites sp.
    [Show full text]
  • Stromatolites of the Belt Series in Glacier National Park and Vicinity, Montana
    Stromatolites of the Belt Series in Glacier National Park and Vicinity, Montana By RICHARD REZAK SHORTER CONTRIBUTIONS TO GENERAL GEOLOGY GEOLOGICAL SURVEY PROFESSIONAL PAPER 294-D Descriptions of eight zones of Precambrian stromatolites, including two new forms, based on a revised method of classification UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1957 UNITED STATES DEPARTMENT OF THE INTERIOR FRED A. SEATON, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director For sale by the Superintendent of Documents, U. S. Government Printing Office Washington 25, D. C. CONTENTS Page Abstract 127 S tratigraphy—Continued Introduction 127 Stromatolite zones—Continued Previous investigations 127 Ravalli group—Continued Page Present investigation 127 Grinnell argillite 136 Area of investigation 128 Collenia undosa zone 1 136 Acknowledgments 129 Piegan group 137 Classification of stromatolites 129 Siyeh limestone 137 General 129 Collenia symmetrica zone 1 137 Previous classifications 130 Conophyton zone 1 138 Pres* ent classification 131 Collenia multiflabella zone 138 Generic distinction 131 Missoula group 139 Specific characteristics 131 Collenia undosa zone 2 139 Gross form of colony 131 zone 2 139 Nature of the laminae 132 Collenia symmetrica Size of colony 132 Conophyton zone 2 140 Types 132 Ecology 141 Key to the identification of stromatolites in the Belt Modern environments 141 series 132 Origin of stromatolites 146 Descriptions of genera and species 132 Paleoecology 147 Genus Cryptozoon Hall 132 Collenia frequens zone 147 Genus Collenia Walcott 133 Newlandia lamellosa 147 Genus Newlandia Walcott 134 Collenia undosa zones 147 Genus Conophyton Maslov 135 Collenia symmetrica zones 148 Stratigraphy 135 zones 148 General 135 Conophyton Stromatolite zones 136 Collenia multiflabella zone 148 Ravalli group 136 Conclusions 149 Altyn limestone 136 Selected bibliography 149 Collenia frequens zone 136 Index 153 ILLUSTRATIONS [Plates 19-24 follow page 154] Page PLATE 18.
    [Show full text]
  • Paleo-The Story of Life
    PALEO: THE STORY OF LIFE Life on Earth has not always existed as it currently does. The fact that life began on Earth in the first place is miraculous due to the environmental factors needed for its beginnings and sustainability. The relentless pursuit of life over billions of years from small living molecules to complex creatures roaming, flying and swimming throughout the Earth has culminated into the current state of life’s existence as we know it on the planet we call home. Paleo: The Story of Life is a 3,000-square-foot exhibit, spanning 4.6 billion years in scope. The exhibit presents casts of 128 rare fossils, including Lucy, Archaeopteryx and T rex, among many others. Drawn from the world’s foremost fossil collections, the Paleo exhibit showcases casts of rare fossils from the Americas, Europe, Asia, Africa and Australia – skeletons, skulls, claws and eggs gathered from prestigious museums, including the Smithsonian Institution, American Museum of Natural History, Royal Ontario Museum and Carnegie Museum, among others. Rarely available for viewing outside of their respective museums, these compelling artifacts are presented exclusively in Paleo: The Story of Life. Fossils range from the earliest invertebrate marine life through the Triassic, Jurassic and Cretaceous dinosaurs to mammals and prehistoric humans. Paleo: The Story of Life explores the comprehensive story of prehistoric life on Earth. The Paleo exhibit is a visiting exhibit and will be on display through Thursday, May 31, 2018. It is located in the Horowitz Traveling Exhibit Area. The MOST presents Paleo: The Story of Life in association with the International Museum Institute, Inc.
    [Show full text]
  • The 1898 Field Season of CD Walcott
    Field work and fossils in southwestern Montana: the 1898 field season of C. D. Walcott Ellis L. Yochelson Research Associate, Department of Paleobiology, National Museum of Natural History, Washington, DC 20013-7012 G. Zieg Senior Geologist, Teck Cominco American Inc., East 15918 Euclid, Spokane, WA 99216 INTRODUCTION In 1879, Charles Doolittle Walcott (1850- 1927) (Yochelson, 1998) joined the new U. S. Geological Survey (USGS) and July 1, 1894, became the third director of the agency. Shortly before that time the USGS had several field parties starting to investigate mining dis- tricts in Montana and Idaho. There was no overall stratigraphic succession, nor clear cor- relation from one mining district to another. In 1895, Walcott took a first quick trip through the Belt Mountains. In the vicinity of Neihart, Montana, he collected Middle Cambrian fossils (Weed, 1900). These fossils established that Lower Cambrian rocks were absent from the area and thus the Belt strata (or Algonkian, as USGS Walcott called them) were pre-Cambrian in age The unhyphenated usage and the lack of capi- ABSTRACT talization of “formation” are relatively late de- velopments in stratigraphic nomenclature. The diary of Charles Doolittle Walcott pro- vides a brief daily account of his investigations For more than fifty years, Walcott used a small of Cambrian and Precambrian rocks, mainly in pocket diary and with his comments one can the Belt Mountains during one field season. trace his route and gain some notion of how These entries also give some notion of the tri- field work was conducted before the days of als of field work before the development of the rapid automobile transportation.
    [Show full text]
  • National Historic Landmarks Geology
    NATIONAL HISTORIC LANDMARKS Dr. Harry A. Butowsky GEOLOGY THEME STUDY Page 1 Geology National Historic Landmark Theme Study (Draft 1990) Introduction by Dr. Harry A. Butowsky Historian, History Division National Park Service, Washington, DC The Geology National Historic Landmark Theme Study represents the second phase of the National Park Service's thematic study of the history of American science. Phase one of this study, Astronomy and Astrophysics: A National Historic Landmark Theme Study was completed in l989. Subsequent phases of the science theme study will include the disciplines of biology, chemistry, mathematics, physics and other related sciences. The Science Theme Study is being completed by the National Historic Landmarks Survey of the National Park Service in compliance with the requirements of the Historic Sites Act of l935. The Historic Sites Act established "a national policy to preserve for public use historic sites, buildings and objects of national significance for the inspiration and benefit of the American people." Under the terms of the Act, the service is required to survey, study, protect, preserve, maintain, or operate nationally significant historic buildings, sites & objects. The National Historic Landmarks Survey of the National Park Service is charged with the responsibility of identifying America's nationally significant historic property. The survey meets this obligation through a comprehensive process involving thematic study of the facets of American History. In recent years, the survey has completed National Historic Landmark theme studies on topics as diverse as the American space program, World War II in the Pacific, the US Constitution, recreation in the United States and architecture in the National Parks.
    [Show full text]
  • Younger Precambrian Geology in Southern Arizona
    Younger Precambrian Geology in Southern Arizona GEOLOGICAL SURVEY PROFESSIONAL PAPER 566 Younger Precambrian Geology in Southern Arizona By ANDREW F. SHRIDE GEOLOGICAL SURVEY PROFESSIONAL PAPER 566 Stratigraphic^ lithologic^ and structural features of younger Precambrian rocks of southern Arizona as a basis for understanding their paleogeography and establishing their correlation UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1967 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY William T. Pecora, Director Library of Congress catalog-card No. OS 67-238 For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 - Price 65 cents (paper cover) CONTENTS Page Page Abstract.__________________________________________ 1 Apache Group Continued Introduction. ______________________________________ 2 Basalt flows.___________________________________ 42 Older Precambrian basement----_----___--___________ 4 General features and distribution.____________ 42 Pre-Apache unconformity._----_-_-_-________________ 6 Petrology.___--_______-_____-_--__________. 43 Thickness and distribution of younger Precambrian rocks. 7 Criteria for distinguishing basalt from diabase.. 43 Apache Group____________________________________ 11 Pre-Troy unconformity.______---_-___________-.____. 44 Pioneer Shale__________________________________ 11 Troy Quartzite.____________________________________ 44 Thickness and general character-_____________ 11 Definition and subdivision.______________________
    [Show full text]
  • 03Whole V2.Pdf
    l"' 3Jl tlyt \ IJ I, ÁD¿L STROMATOLTTES AND THE BIOSTRATTGRAPHY OF THE AUSTRALIAN PRECAMBRIAN uith appendioes on pseudofossils f¡om Aust¡a1ian Preoambrían iron-formation and greyulacke Volurre I I by fYl. R. llJa1ter, B.Sc. (Hons) Departmenf of Geology and fflineralogy University of Adelaide April 1970 Contents Volume II APPENDICES Appendix I PSEUDOFOSSILS FROM THE BROCKMAN IRON FORMATION (eRecRmonrRru, UiESTERN AUSTRALTA) nruo THEIR DIAGENETIC SIGNIFICANCE Abst¡act....... aaao a 407 Int¡oductlon.... aa a 40d The Brockman lron FormatÍon and its regÍonal geological envíronmonü . aaaa a 409 Eolloidal phenomena . a..a 4L3 Diagenesie of iron-formatÍons aaa. 415 Pseudofossíls from the Brockman Iron Formation...... aa a 4L9 Discuseion..... .a 443 Conclusions. , . aeaa 44s Refgtenegs....... aa 44? Appendfx II TECTONICALLY DEFORMED SAND VOLCANOES FROM A PRECAIYìBRTAN GREYIIIACKE, N0RÍHERN TERRITORY Introduction........ 456 Occurrgnce...o..... 456 ffìorphologYandPetrologY r . 4s7 lYlodeof formatÍon . a 46r Simila¡structu¡es'. a 463 Summary....,. 464 Rgfgrences........' 465 TABLEs I-4 ,6 5 oå"l'lF",li|Tå ? I i'"ï", :"':"i F IGURES I-36 ¡ 38-50 a r . aftertable6 37.. a pocket at the back of voI.II PLATES t-40 after fig.50 APPENDIX I PSEUDOFOSS]L5 FROM THE BROCKMAN IRON FoRmATIoN (nnrcamenrAN, UESTERN Augrnnlin) AND THEIR DIAGENETIC SiGNIFICANCE -4A7- ABSTRAGT ColloÍdat processee ulere of paramount importance durlng dÍagenesis of the Brookman lron Formation. The presence of large lobate and coneentric medusiform pseudo- fossils that formed by the diffusion and rhythmic precipitation of sÍlica and of numerous septarian nodules and their moulds and castg (some medusiform) Índicates that the lron-formation urae galatinous during diagenesis.
    [Show full text]