Phanerozoic Paleoenvironment and Paleolithofacies Maps. Late Paleozoic
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Chapter 22 Notes: Introduction to Evolution
NOTES: Ch 22 – Descent With Modification – A Darwinian View of Life Our planet is home to a huge variety of organisms! (Scientists estimate of organisms alive today!) Even more amazing is evidence of organisms that once lived on earth, but are now . Several hundred million species have come and gone during 4.5 billion years life is believed to have existed on earth So…where have they gone… why have they disappeared? EVOLUTION: the process by which have descended from . Central Idea: organisms alive today have been produced by a long process of . FITNESS: refers to traits and behaviors of organisms that enable them to survive and reproduce COMMON DESCENT: species ADAPTATION: any inherited characteristic that enhances an organism’s ability to ~based on variations that are HOW DO WE KNOW THAT EVOLUTION HAS OCCURRED (and is still happening!!!)??? Lines of evidence: 1) So many species! -at least (250,000 beetles!) 2) ADAPTATIONS ● Structural adaptations - - ● Physiological adaptations -change in - to certain toxins 3) Biogeography: - - and -Examples: 13 species of finches on the 13 Galapagos Islands -57 species of Kangaroos…all in Australia 4) Age of Earth: -Rates of motion of tectonic plates - 5) FOSSILS: -Evidence of (shells, casts, bones, teeth, imprints) -Show a -We see progressive changes based on the order they were buried in sedimentary rock: *Few many fossils / species * 6) Applied Genetics: “Artificial Selection” - (cattle, dogs, cats) -insecticide-resistant insects - 7) Homologies: resulting from common ancestry Anatomical Homologies: ● comparative anatomy reveals HOMOLOGOUS STRUCTURES ( , different functions) -EX: ! Vestigial Organs: -“Leftovers” from the evolutionary past -Structures that Embryological Homologies: ● similarities evident in Molecular/Biochemical Homologies: ● DNA is the “universal” genetic code or code of life ● Proteins ( ) Darwin & the Scientists of his time Introduction to Darwin… ● On November 24, 1859, Charles Darwin published On the Origin of Species by Means of Natural Selection. -
Proceedings of the Open University Geological Society
0 OUGS Proceedings 5 2019_OUGSJ 26/02/2019 11:45 Page i Proceedings of the Open University Geological Society Volume 5 2019 Including articles from the AGM 2018 Geoff Brown Memorial Lecture, the ‘Music of the Earth’ Symposium 2018 lectures (Worcester University), OUGS Members’ field trip reports, the Annual Report for 2018, and the 2018 Moyra Eldridge Photographic Competition Winning and Highly Commended photographs Edited and designed by: Dr David M. Jones 41 Blackburn Way, Godalming, Surrey GU7 1JY e-mail: [email protected] The Open University Geological Society (OUGS) and its Proceedings Editor accept no responsibility for breach of copyright. Copyright for the work remains with the authors, but copyright for the published articles is that of the OUGS. ISSN 2058-5209 © Copyright reserved Proceedings of the OUGS 5 2019; published 2019; printed by Hobbs the Printers Ltd, Totton, Hampshire 0 OUGS Proceedings 5 2019_OUGSJ 26/02/2019 11:46 Page 35 The complex tectonic evolution of the Malvern region: crustal accretion followed by multiple extensional and compressional reactivation Tim Pharaoh British Geological Survey, Keyworth, Nottingham, NG12 5GG ([email protected]) Abstract The Malvern Hills include some of the oldest rocks in southern Britain, dated by U-Pb zircon analysis to c. 680Ma. They reflect calc- alkaline arc magmatic activity along a margin of the Rodinia palaeocontinent, hints of which are provided by inherited zircon grains as old as 1600Ma. Metamorphic recrystallisation under upper greenschist/amphibolite facies conditions occurred from c. 650–600Ma. Subsequently, rifting of the magmatic arc (c.f. the modern western Pacific) at c. 565Ma led to the formation of a small oceanic mar- ginal basin, evidenced by basaltic pillow lavas and tuffs of the Warren House Formation, and Kempsey Formation equivalents beneath the Worcester Graben. -
The North-Subducting Rheic Ocean During the Devonian: Consequences for the Rhenohercynian Ore Sites
Published in "International Journal of Earth Sciences 106(7): 2279–2296, 2017" which should be cited to refer to this work. The north-subducting Rheic Ocean during the Devonian: consequences for the Rhenohercynian ore sites Jürgen F. von Raumer1 · Heinz-Dieter Nesbor2 · Gérard M. Stampfli3 Abstract Base metal mining in the Rhenohercynian Zone activated Early Devonian growth faults. Hydrothermal brines has a long history. Middle-Upper Devonian to Lower Car- equilibrated with the basement and overlying Middle-Upper boniferous sediment-hosted massive sulfide deposits Devonian detrital deposits forming the SHMS deposits in the (SHMS), volcanic-hosted massive sulfide deposits (VHMS) southern part of the Pyrite Belt, in the Rhenish Massif and and Lahn-Dill-type iron, and base metal ores occur at sev- in the Harz areas. Volcanic-hosted massive sulfide deposits eral sites in the Rhenohercynian Zone that stretches from the (VHMS) formed in the more eastern localities of the Rheno- South Portuguese Zone, through the Lizard area, the Rhen- hercynian domain. In contrast, since the Tournaisian period ish Massif and the Harz Mountain to the Moravo-Silesian of ore formation, dominant pull-apart triggered magmatic Zone of SW Bohemia. During Devonian to Early Carbonif- emplacement of acidic rocks, and their metasomatic replace- erous times, the Rhenohercynian Zone is seen as an evolv- ment in the apical zones of felsic domes and sediments in ing rift system developed on subsiding shelf areas of the the northern part of the Iberian Pyrite belt, thus changing the Old Red continent. A reappraisal of the geotectonic setting general conditions of ore precipitation. -
Chapter 2 Paleozoic Stratigraphy of the Grand Canyon
CHAPTER 2 PALEOZOIC STRATIGRAPHY OF THE GRAND CANYON PAIGE KERCHER INTRODUCTION The Paleozoic Era of the Phanerozoic Eon is defined as the time between 542 and 251 million years before the present (ICS 2010). The Paleozoic Era began with the evolution of most major animal phyla present today, sparked by the novel adaptation of skeletal hard parts. Organisms continued to diversify throughout the Paleozoic into increasingly adaptive and complex life forms, including the first vertebrates, terrestrial plants and animals, forests and seed plants, reptiles, and flying insects. Vast coal swamps covered much of mid- to low-latitude continental environments in the late Paleozoic as the supercontinent Pangaea began to amalgamate. The hardiest taxa survived the multiple global glaciations and mass extinctions that have come to define major time boundaries of this era. Paleozoic North America existed primarily at mid to low latitudes and experienced multiple major orogenies and continental collisions. For much of the Paleozoic, North America’s southwestern margin ran through Nevada and Arizona – California did not yet exist (Appendix B). The flat-lying Paleozoic rocks of the Grand Canyon, though incomplete, form a record of a continental margin repeatedly inundated and vacated by shallow seas (Appendix A). IMPORTANT STRATIGRAPHIC PRINCIPLES AND CONCEPTS • Principle of Original Horizontality – In most cases, depositional processes produce flat-lying sedimentary layers. Notable exceptions include blanketing ash sheets, and cross-stratification developed on sloped surfaces. • Principle of Superposition – In an undisturbed sequence, older strata lie below younger strata; a package of sedimentary layers youngs upward. • Principle of Lateral Continuity – A layer of sediment extends laterally in all directions until it naturally pinches out or abuts the walls of its confining basin. -
Late Paleozoic Sea Levels and Depositional Sequences Charles A
Western Washington University Western CEDAR Geology Faculty Publications Geology 1987 Late Paleozoic Sea Levels and Depositional Sequences Charles A. Ross Western Washington University, [email protected] June R. P. Ross Western Washington University Follow this and additional works at: https://cedar.wwu.edu/geology_facpubs Part of the Geology Commons, and the Paleontology Commons Recommended Citation Ross, Charles A. and Ross, June R. P., "Late Paleozoic Sea Levels and Depositional Sequences" (1987). Geology Faculty Publications. 61. https://cedar.wwu.edu/geology_facpubs/61 This Article is brought to you for free and open access by the Geology at Western CEDAR. It has been accepted for inclusion in Geology Faculty Publications by an authorized administrator of Western CEDAR. For more information, please contact [email protected]. Cushman Foundation for Foraminiferal Research, Special Publication 24, 1987. LATE PALEOZOIC SEA LEVELS AND DEPOSITIONAL SEQUENCES CHARLES A. ROSSI AND JUNE R. P. ROSS2 1 Chevron U.S.A., Inc.,P. O. BOX 1635, Houston, TX 77251 2 Department of Biology, Western Washington University, Bellingham, WA 98225 ABSTRACT studies on these changes in sea level and their paleogeographic distribution (Ross, 1979; Ross Cyclic sea level charts for the Lower and Ross, 1979, 1981a, 1981b, 1985a, 1985b) are Carboniferous (Mississippian), Middle and Upper elaborated on in this paper with charts in a Carboniferous (Pennsylvanian), and Permian show similar format to that used for Mesozoic and considerable variability in the duration and Cenozoic sea-level cyclic fluctuations by Haq, magnitude of third-order depositional sequences, Hardenbol, and Vail (1987 and this volume). and also in the position of general sea level as represented by second-order sea level. -
燕一哪一赞一臀耀黔 Published Interpretations (Bell, T.H ., 1983; N Ature, 304, P
C O N F E R E N C E R E P O R T S D efo rm atio n o f C ru stal R o ck s M t. Buffalo, Victoria, A ustralia, 2 一6 February 1987 In the H a rt s Range area P.R . Jam es and P. Ding have re- interpreted infrastructural basem ent and supracrustal cover O ne hundred and thirty structural geologists m et recently at to represent tw o related orogenic belts separated by a thick, M t. Buffalo in the high country of Victoria to discuss com plex, m id-crustal detachm ent zone characterized by aspects of crustal rock deform ation. The international early N -S crustal extension. In the southern A runta, C . conference w as hosted by the Specialist G roup in T ectonics A m ri and others have recognized a sub-horizontal shear and Structural G eology (SG T SG ) of the G eological Society of zone in Proterozoic gneisses w ith a N E directed shear and A ustralia. The conferences are held approxim ately every have suggested opposed thrusting during the Proterozoic and three years and provide a forum for the discussion o f re- Palaeozoic orogenies. Thrusting associated w ith the Late search results w ithin A ustralia. U nfortunately there w ere D evonian-Early Carboniferous event has determ ined the only eleven foreign participants (from Sw itzerland, Italy, present outcrop relations of the A runta com plex (A .J. A ustria, Canada, U .S.A . and M alaysia). -
Structural and Tectonic Evolution of the Acatlán Complex, Southern Mexico
TECTONICS, VOL. 28, TC4008, doi:10.1029/2007TC002159, 2009 Click Here for Full Article Structural and tectonic evolution of the Acatla´n Complex, southern Mexico: Its role in the collisional history of Laurentia and Gondwana Ricardo Vega-Granillo,1 Thierry Calmus,2 Diana Meza-Figueroa,1 Joaquı´n Ruiz,3 Oscar Talavera-Mendoza,4 and Margarita Lo´pez-Martı´nez5 Received 24 May 2007; revised 22 January 2009; accepted 10 March 2009; published 25 July 2009. [1] Correlation of deformational phases and thermal opening. Citation: Vega-Granillo, R., T. Calmus, D. Meza- events in the Acatla´n Complex permits definition of Figueroa, J. Ruiz, O. Talavera-Mendoza, and M. Lo´pez-Martı´nez nine major tectonic events. Seven events are related to (2009), Structural and tectonic evolution of the Acatla´n Complex, the evolution of the Iapetus and Rheic oceans. By the southern Mexico: Its role in the collisional history of Laurentia Early Ordovician, the Xayacatla´n suite of Laurentian and Gondwana, Tectonics, 28, TC4008, doi:10.1029/ affinity was metamorphosed to eclogite facies and 2007TC002159. exhumed before colliding with the El Rodeo suite. From the Late Ordovician to Silurian, the Upper 1. Introduction Ordovician Ixcamilpa suite with peri-Gondwanan affinity was metamorphosed to blueschist facies, [2] The Acatla´n Complex basement of the Mixteco exhumed, and subsequently was overthrust by the terrane contains the largest exposure of eclogites, high-P Xayacatla´n–El Rodeo block. Part of the Esperanza garnet amphibolites, blueschists and eclogitized granitoids of Paleozoic age in Mexico. In a strict sense, the Mixteco suite is an Early Silurian intra-Iapetian continental arc terrane must be considered a superterrane composed of that collided with and subducted beneath continental thrust sheets containing Mesoproterozoic to Paleozoic pet- crust, generating a Silurian eclogitic event. -
Balkatach Hypothesis: a New Model for the Evolution of the Pacific, Tethyan, and Paleo-Asian Oceanic Domains
Research Paper GEOSPHERE Balkatach hypothesis: A new model for the evolution of the Pacific, Tethyan, and Paleo-Asian oceanic domains 1,2 2 GEOSPHERE, v. 13, no. 5 Andrew V. Zuza and An Yin 1Nevada Bureau of Mines and Geology, University of Nevada, Reno, Nevada 89557, USA 2Department of Earth, Planetary, and Space Sciences, University of California, Los Angeles, California 90095-1567, USA doi:10.1130/GES01463.1 18 figures; 2 tables; 1 supplemental file ABSTRACT suturing. (5) The closure of the Paleo-Asian Ocean in the early Permian was accompanied by a widespread magmatic flare up, which may have been CORRESPONDENCE: avz5818@gmail .com; The Phanerozoic history of the Paleo-Asian, Tethyan, and Pacific oceanic related to the avalanche of the subducted oceanic slabs of the Paleo-Asian azuza@unr .edu domains is important for unraveling the tectonic evolution of the Eurasian Ocean across the 660 km phase boundary in the mantle. (6) The closure of the and Laurentian continents. The validity of existing models that account for Paleo-Tethys against the southern margin of Balkatach proceeded diachro- CITATION: Zuza, A.V., and Yin, A., 2017, Balkatach hypothesis: A new model for the evolution of the the development and closure of the Paleo-Asian and Tethyan Oceans criti- nously, from west to east, in the Triassic–Jurassic. Pacific, Tethyan, and Paleo-Asian oceanic domains: cally depends on the assumed initial configuration and relative positions of Geosphere, v. 13, no. 5, p. 1664–1712, doi:10.1130 the Precambrian cratons that separate the two oceanic domains, including /GES01463.1. the North China, Tarim, Karakum, Turan, and southern Baltica cratons. -
Biblical Catastrophism and Geology
BIBLICAL CATASTROPHISM AND GEOLOGY HENRY M. MORRIS Professor of Civi I Engineering Virginia Polytechnic Institute Theories of catastrophism in geological interpretation are not new. Prior to the time of Sir Charles Lyell, scientists generally believed that most geological formations must be attributed to great physical catastrophes or revolutions. Lyell, however, taught that these phenomena could be explained by the ordinary processes of nature, acting over vast expanses of geological time. This is his "principle of uniformitarianism, II. now almost universally accepted as the foundation princ~ple of modern historical geology. Profoundly influenced by LyelPs theories, Charles Darwin soon published his theory of evolu tion by natural selection. The supposed paleontologi cal record of the evolutionary history of life on earth, together with the principle of uniformity, now constitutes the interpretive framework within which all data of historical geology are supposed to be explained. Furthermore, this phil osophy of evolutionary uniformitarianism now serves also as the interpretive framework in the social sciences and economi cs, and even in the study of religion itself. Thus a superstructure of gigantic size has been erected on the Lyellian-Darwinian foundation. However, catastrophism is not dead. The inadequacies of a thorough-going uniformitarianism have become increasingly obvious in recent years, and such quasi-catastrophist concepts as wan dering continents, shifting poles, slipping crusts, meteoritic and cometary collisions, etc., are appearing more and more frequently in geological literature. It is, in fact, generally recognized that even the ordinary fossiliferous deposits of the sedimentary rocks must often have at least a semi-catastrophist basis, since the process of fossilization usually requires rather rapid burial, under conditions seldom encountered in the modern world. -
Guadalupian, Middle Permian) Mass Extinction in NW Pangea (Borup Fiord, Arctic Canada): a Global Crisis Driven by Volcanism and Anoxia
The Capitanian (Guadalupian, Middle Permian) mass extinction in NW Pangea (Borup Fiord, Arctic Canada): A global crisis driven by volcanism and anoxia David P.G. Bond1†, Paul B. Wignall2, and Stephen E. Grasby3,4 1Department of Geography, Geology and Environment, University of Hull, Hull, HU6 7RX, UK 2School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, UK 3Geological Survey of Canada, 3303 33rd Street N.W., Calgary, Alberta, T2L 2A7, Canada 4Department of Geoscience, University of Calgary, 2500 University Drive N.W., Calgary Alberta, T2N 1N4, Canada ABSTRACT ing gun of eruptions in the distant Emeishan 2009; Wignall et al., 2009a, 2009b; Bond et al., large igneous province, which drove high- 2010a, 2010b), making this a mid-Capitanian Until recently, the biotic crisis that oc- latitude anoxia via global warming. Although crisis of short duration, fulfilling the second cri- curred within the Capitanian Stage (Middle the global Capitanian extinction might have terion. Several other marine groups were badly Permian, ca. 262 Ma) was known only from had different regional mechanisms, like the affected in equatorial eastern Tethys Ocean, in- equatorial (Tethyan) latitudes, and its global more famous extinction at the end of the cluding corals, bryozoans, and giant alatocon- extent was poorly resolved. The discovery of Permian, each had its roots in large igneous chid bivalves (e.g., Wang and Sugiyama, 2000; a Boreal Capitanian crisis in Spitsbergen, province volcanism. Weidlich, 2002; Bond et al., 2010a; Chen et al., with losses of similar magnitude to those in 2018). In contrast, pelagic elements of the fauna low latitudes, indicated that the event was INTRODUCTION (ammonoids and conodonts) suffered a later, geographically widespread, but further non- ecologically distinct, extinction crisis in the ear- Tethyan records are needed to confirm this as The Capitanian (Guadalupian Series, Middle liest Lopingian (Huang et al., 2019). -
Carboniferous Formations and Faunas of Central Montana
Carboniferous Formations and Faunas of Central Montana GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 Carboniferous Formations and Faunas of Central Montana By W. H. EASTON GEOLOGICAL SURVEY PROFESSIONAL PAPER 348 A study of the stratigraphic and ecologic associa tions and significance offossils from the Big Snowy group of Mississippian and Pennsylvanian rocks UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1962 UNITED STATES DEPARTMENT OF THE INTERIOR STEWART L. UDALL, Secretary GEOLOGICAL SURVEY Thomas B. Nolan, Director The U.S. Geological Survey Library has cataloged this publication as follows : Eastern, William Heyden, 1916- Carboniferous formations and faunas of central Montana. Washington, U.S. Govt. Print. Off., 1961. iv, 126 p. illus., diagrs., tables. 29 cm. (U.S. Geological Survey. Professional paper 348) Part of illustrative matter folded in pocket. Bibliography: p. 101-108. 1. Paleontology Montana. 2. Paleontology Carboniferous. 3. Geology, Stratigraphic Carboniferous. I. Title. (Series) For sale by the Superintendent of Documents, U.S. Government Printing Office Washington 25, B.C. CONTENTS Page Page Abstract-__________________________________________ 1 Faunal analysis Continued Introduction _______________________________________ 1 Faunal relations ______________________________ 22 Purposes of the study_ __________________________ 1 Long-ranging elements...__________________ 22 Organization of present work___ __________________ 3 Elements of Mississippian affinity.._________ 22 Acknowledgments--.-------.- ___________________ -
The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions
REVIEW published: 28 May 2021 doi: 10.3389/feart.2021.603565 The Truong Son, Loei-Phetchabun, and Kontum Terranes in Indochina: Provenance, Rifting, and Collisions Clive Burrett 1, Mongkol Udchachon 1,2* and Hathaithip Thassanapak 2 1 Palaeontological Research and Education Centre, Mahasarakham University, Mahasarakham, Thailand, 2 Applied Palaeontology and Biostratigraphy Research Unit, Department of Biology, Faculty of Science, Mahasarakham University, Mahasarakham, Thailand The three main regions of Indochina are defined as the Truong Son, Loei-Phetchabun, and Kontum terranes. The aim of this review is to integrate numerous petrological studies with sedimentary, palaeontological, and provenance studies in order to construct a preliminary tectonic model which shows the terranes docked in the earliest Carboniferous (Truong Son with Loei-Phetchabun) and in the Permian (Kontum). The Kontum Terrane is characterized by Proterozoic magmatism, mid-Ordovician to Early Devonian granites, and Permian charnockites. Major carbonate platforms developed in the Givetian to earliest Tournaisian on Truong Son and from the Visean to mid-Permian across Truong Edited by: Son and Loei-Phetchabun terranes. The Truong Son has Silurian granites and a Basilios Tsikouras, Late Ordovician to Silurian magmatic arc along its southern and western borders Universiti Brunei Darussalam, Brunei caused by subduction of oceanic lithosphere, the remnants of which are now partially Reviewed by: Antonio Pedrera, preserved in the Loei and Tamky sutures. A region to the east of the Loei Suture in Instituto Geológico y Minero de the Loei Foldbelt has a similar-age volcanic arc extending northwards into Laos and España (IGME), Spain Sergio Llana-Fúnez, is included in Truong Son.