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Two New Crinoids from Lower Mississippian Rocks in Southeastern Kentucky
TWO NEW CRINOIDS FROM LOWER MISSISSIPPIAN ROCKS IN SOUTHEASTERN KENTUCKY BY GEORGE M. EHLERS AND ROBERT V. KESLING Reprinted from JOURNAL OF PALEONTOLOGY Val. 37, No. 5, September, 1963 JOURNALOF PALEONTOLOGY,V. 37, NO. 5, P. 1028-1041, PLS. 133,134, 3 TEXT-FIGS., SEPTEMBER,1963 TWO NEW CRINOIDS FROM L20\'C7ERMISSISSIPPIAN ROCKS IN SOUTHEASTERN KENTUCKY GEORGE M. EHLERS AKD ROBERT V. ICESLING Museum of Paleontology, The University of Michigan .~BsTR.~~T-AII~~~~specimens collected many years ago bl- the senior author and his students near Mill Springs, Kentucky, are a new species of Agaricocrinzis and a new speries of Actino- crinites. Although only one specimen of each is known, it is well preserved. The new Agnrico- crinus bears a resemblance to A. ponderoszts Wood, and the new Actinocriniles to four species described by Miller & Gurley: A. spergenensis, A. botuztosz~s,A. gibsoni, and A. shnronensis. A preliminary survey of species assigned to Agaricocrinz~ssuggests that revision of the genus is overdue. Although the occurrence of the specimens leaves some doubt as to their stratigraphic posi- tion, we conclude that they both probably weathered from the Fort Payne formation and rolled down the slope onto the New Providence, where they were found. The sites where the crinoids were picked up are now deeply inundated by water impounded by the Wolf Creek dam on the Cumberland River. INTRODUCTION onto the New Providence, \$here they were OTH of the new crinoids described here are found. rZt present, both the New Providence B from Lower Mississippian rocks in the valley formation and the I~asalbeds of the Fort Payne of the Cumberland River in Wayne and Russell are underwater at the type locality of the new Counties, Kentucky. -
Conodonts and Foraminifers
Journal of Asian Earth Sciences 108 (2015) 117–135 Contents lists available at ScienceDirect Journal of Asian Earth Sciences journal homepage: www.elsevier.com/locate/jseaes An integrated biostratigraphy (conodonts and foraminifers) and chronostratigraphy (paleomagnetic reversals, magnetic susceptibility, elemental chemistry, carbon isotopes and geochronology) for the Permian–Upper Triassic strata of Guandao section, Nanpanjiang Basin, south China ⇑ Daniel J. Lehrmann a, , Leanne Stepchinski a, Demir Altiner b, Michael J. Orchard c, Paul Montgomery d, Paul Enos e, Brooks B. Ellwood f, Samuel A. Bowring g, Jahandar Ramezani g, Hongmei Wang h, Jiayong Wei h, Meiyi Yu i, James D. Griffiths j, Marcello Minzoni k, Ellen K. Schaal l,1, Xiaowei Li l, Katja M. Meyer l,2, Jonathan L. Payne l a Geoscience Department, Trinity University, San Antonio, TX 78212, USA b Department of Geological Engineering, Middle East Technical University, Ankara 06531, Turkey c Natural Resources Canada-Geological Survey of Canada, Vancouver, British Columbia V6B 5J3, Canada d Chevron Upstream Europe, Aberdeen, Scotland, UK e Department of Geology, University of Kansas, Lawrence, KS 66045, USA f Louisiana State University, Baton Rouge, LA 70803, USA g Department of Earth, Atmospheric, and Planetary Sciences, Massachusetts Institute of Technology, Cambridge, MA 02139, USA h Guizhou Geological Survey, Bagongli, Guiyang 550011, Guizhou Province, China i College of Resource and Environment Engineering, Guizhou University, Caijiaguan, Guiyang 550003, Guizhou Province, China j Chemostrat Ltd., 2 Ravenscroft Court, Buttington Cross Enterprise Park, Welshpool, Powys SY21 8SL, UK k Shell International Exploration and Production, 200 N. Dairy Ashford, Houston, TX 77079, USA l Department of Geological and Environmental Sciences, Stanford University, Stanford, CA 94305, USA article info abstract Article history: The chronostratigraphy of Guandao section has served as the foundation for numerous studies of the Received 13 October 2014 end-Permian extinction and biotic recovery in south China. -
From the Ordovician (Darriwillian) of Morocco
Palaeogeographic implications of a new iocrinid crinoid (Disparida) from the Ordovician (Darriwillian) of Morocco Samuel Zamora1, Imran A. Rahman2 and William I. Ausich3 1 Instituto Geologico´ y Minero de Espana,˜ Zaragoza, Spain 2 School of Earth Sciences, University of Bristol, Bristol, United Kingdom 3 School of Earth Sciences, Ohio State University, Columbus, OH, United States ABSTRACT Complete, articulated crinoids from the Ordovician peri-Gondwanan margin are rare. Here, we describe a new species, Iocrinus africanus sp. nov., from the Darriwilian-age Taddrist Formation of Morocco. The anatomy of this species was studied using a combination of traditional palaeontological methods and non-destructive X-ray micro-tomography (micro-CT). This revealed critical features of the column, distal arms, and aboral cup, which were hidden in the surrounding rock and would have been inaccessible without the application of micro-CT. Iocrinus africanus sp. nov. is characterized by the presence of seven to thirteen tertibrachials, three in-line bifurcations per ray, and an anal sac that is predominantly unplated or very lightly plated. Iocrinus is a common genus in North America (Laurentia) and has also been reported from the United Kingdom (Avalonia) and Oman (middle east Gondwana). Together with Merocrinus, it represents one of the few geographically widespread crinoids during the Ordovician and serves to demonstrate that faunal exchanges between Laurentia and Gondwana occurred at this time. This study highlights the advantages of using both conventional -
Biostratigraphic Precision of the Cruziana Rugosa Group: a Study from the Ordovician Succession of Southern and Central Bolivia
Geol. Mag. 144 (2), 2007, pp. 289–303. c 2007 Cambridge University Press 289 doi:10.1017/S0016756807003093 First published online 9 February 2007 Printed in the United Kingdom Biostratigraphic precision of the Cruziana rugosa group: a study from the Ordovician succession of southern and central Bolivia SVEN O. EGENHOFF∗, BERND WEBER†, OLIVER LEHNERT‡ &JORG¨ MALETZ§ ∗Colorado State University, Department of Geosciences, 322 Natural Resources Building, Fort Collins, CO 80523-1482, USA †Freie Universitat¨ Berlin, Institut fur¨ Geologische Wissenschaften, Fachrichtung Geologie, Malteserstrasse 74-100, D-12249 Berlin, Germany ‡University of Erlangen, Institute of Geology and Mineralogie, Schlossgarten 5, D-91054 Erlangen, Germany §Department of Geology, State University of New York at Buffalo, 772 Natural Sciences and Mathematics Complex, Buffalo, New York 14260-3050, USA (Received 10 October 2005; revised version received 1 May 2006; accepted 22 May 2006) Abstract – Cruziana ichnospecies have been repeatedly reported to have biostratigraphic significance. This study presents a re-evaluation of the arthropod ichnotaxa of the Cruziana rugosa Group from bio- and/or lithostratigraphically well-defined Lower to Upper Ordovician siliciclastic sections of southern and central Bolivia. With the exception of Cruziana rouaulti, the ichnofaunas contain all the members of the Cruziana rugosa Group throughout the Ordovician (Arenig to Caradoc) successions in Bolivia. The Bolivian material therefore indicates that these arthropod ichnofossil assemblages are suitable for recognizing Ordovician strata in Bolivia. These findings cast doubt on their use as reliable indicators for a global intra-Ordovician (Arenig to Caradoc) biozonation of Peri-Gondwanan sedimentary successions. Keywords: Cruziana, biostratigraphy, Bolivia, Ordovician. 1. Introduction to the present study. -
New Middle Carnian and Rhaetian Conodonts from Hungary and the Alps
Jb. Geol. B.-A. ISSN 0016-7800 Band 134 Heft 2 S.271-297 Wien, Oktober 1991 New Middle Carnian and Rhaetian Conodonts from Hungary and the Alps. Stratigraphic Importance and Tectonic Implications for the Buda Mountains and Adjacent Areas By HEINZ KOZUR & RUDOLF MOCK') With 1 Text-Figure, 2 Tables and 7 Plates Hungary Alps Buda Mountains Conodonts Stratigraphy Contents Zusammenfassung 271 Abstract 272 1. Introduction 272 2. Taxonomic Part 273 3. Stratigraphic Evaluation of the Rhaetian Conodonts in the Alps and Hungary 277 3.1. Misikella hemsteini - Parvigondolella andrusovi Assemblage Zone 278 3.2. Misikella posthemsteini Assemblage Zone 279 3.2.1. Misikella hemsteini - Misikella posthemsteini Subzone 280 3.2.2. Misikella koessenensis Subzone 281 3.3. Misikella ultima Zone 281 3.4. Neohindeodella detrei Zone 282 4. Stratigraphic and Tectonic Implications of the New Rhaetian Conodont Data for the Investigated areas in Hungary 282 4.1. Csövar (Triassic of the Left side of Danube River) 282 4.2. Buda Mountains and Pillis Mountains 283 Acknowledgements 289 References 296 Neue mittel karnische und rhätische Conodonten aus Ungarn und den Alpen. Stratigraphische Bedeutung und tektonische Konsequenzen für die Budaer Berge und angrenzende Gebiete. Zusammenfassung Zum ersten Mal wurden mittel karnische Conodonten in den nordwestlichen Budaer Bergen und in Pilisvörösvar, beide Lokali- täten NW der Buda-Linie, gefunden. Aus diesen Schichten wird Nicoraella ? budaensis n. sp. beschrieben, die einzige darin vor- kommende Conodontenart. Ein neuer Einzahnconodont, Zieglericonus rhaeticus n. gen. n. sp., und die neuen Arten Misikel/a ultima n. sp., Neohindeodel/a detrei n. sp., N. rhaetica n.sp. -
Exceptionally Well-Preserved Fossils in a Middle Ordovician Impact Crater
Downloaded from http://jgs.lyellcollection.org/ by guest on September 29, 2021 Review focus Journal of the Geological Society Published Online First https://doi.org/10.1144/jgs2018-101 The Winneshiek biota: exceptionally well-preserved fossils in a Middle Ordovician impact crater Derek E.G. Briggs1,2*, Huaibao P. Liu3, Robert M. McKay3 & Brian J. Witzke4 1 Department of Geology and Geophysics, Yale University, New Haven, CT 06520, USA 2 Yale Peabody Museum of Natural History, Yale University, New Haven, CT 06520, USA 3 Iowa Geological Survey, IIHR – Hydroscience & Engineering, University of Iowa, 340 Trowbridge Hall, Iowa City, IA 52242, USA 4 Department of Earth and Environmental Sciences, University of Iowa, 115 Trowbridge Hall, Iowa City, IA 52242, USA D.E.G.B., 0000-0003-0649-6417 * Correspondence: [email protected] Abstract: The Winneshiek Shale (Middle Ordovician, Darriwilian) was deposited in a meteorite crater, the Decorah impact structure, in NE Iowa. This crater is 5.6 km in diameter and penetrates Cambrian and Ordovician cratonic strata. It was probably situated close to land in an embayment connected to the epicontinental sea; typical shelly marine taxa are absent. The Konservat-Lagerstätte within the Winneshiek Shale is important because it represents an interval when exceptional preservation is rare. The biota includes the earliest eurypterid, a giant form, as well as a new basal chelicerate and the earliest ceratiocarid phyllocarid. Conodonts, some of giant size, occur as bedding plane assemblages. Bromalites and rarer elements, including a linguloid brachiopod and a probable jawless fish, are also present. Similar fossils occur in the coeval Ames impact structure in Oklahoma, demonstrating that meteorite craters represent a novel and under-recognized setting for Konservat- Lagerstätten. -
Conodonts in Ordovician Biostratigraphy
View metadata, citation and similar papers at core.ac.uk brought to you by CORE provided by Archivio istituzionale della ricerca - Università di Modena e Reggio Emilia 1 Conodonts in Ordovician biostratigraphy STIG M. BERGSTRÖM AND ANNALISA FERRETTI Conodonts in Ordovician biostratigraphy The long time interval after Pander’s (1856) original conodont study can in terms of Ordovician conodont biostratigraphic research be subdivided into three periods, namely the Pioneer Period (1856-1955), the Transition Period (1955-1971), and the Modern Period (1971-Recent). During the pre-1920s, the few published conodont investigations were restricted to Europe and North America and were not concerned about the potential use of conodonts as guide fossils. Although primarily of taxonomic nature, the pioneer studies by Branson & Mehl, Stauffer, and Furnish during the 1930s represent the beginning of the use of conodonts in Ordovician biostratigraphy. However, no formal zones were introduced until Lindström (1955) proposed four conodont zones in the Lower Ordovician of Sweden, which marks the end of the Pioneer Period. Because Lindström’s zone classification was not followed by similar work outside Baltoscandia, the time interval up to the late 1960s can be regarded as a Transition Period. A milestone symposium volume, entitled ‘Conodont Biostratigraphy’ and published in 1971, 2 summarized much new information on Ordovician conodont biostratigraphy and is taken as the beginning of the Modern Period of Ordovician conodont biostratigraphy. In this volume, the Baltoscandic Ordovician was subdivided into named conodont zones whereas the North American Ordovician succession was classified into a series of lettered or numbered Faunas. Although most of the latter did not receive zone names until 1984, this classification has been used widely in North America. -
Bedrock Geology of Altenburg Quadrangle, Jackson County
BEDROCK GEOLOGY OF ALTENBURG QUADRANGLE Institute of Natural Resource Sustainability William W. Shilts, Executive Director JACKSON COUNTY, ILLINOIS AND PERRY COUNTY, MISSOURI STATEMAP Altenburg-BG ILLINOIS STATE GEOLOGICAL SURVEY E. Donald McKay III, Interim Director Mary J. Seid, Joseph A. Devera, Allen L. Weedman, and Dewey H. Amos 2009 360 GEOLOGIC UNITS ) ) ) 14 Qal Alluvial deposits ) 13 18 Quaternary Pleistocene and Holocene 17 360 ) 15 360 16 14 0 36 ) 13 Qf Fan deposits ) Unconformity Qal ) & 350 tl Lower Tradewater Formation Atokan ) ) Pennsylvanian 360 ) &cv Caseyville Formation Morrowan 24 360 ) Unconformity ) 17 Upper Elviran undivided, Meu ) Waltersburg to top of Degonia 19 20 Qal 21 22 23 ) 24 ) Mv Vienna Limestone 360 o ) 3 Mts ) 350 Mts Tar Springs Sandstone ) 20 360 ) Mgd 360 30 ) Mgd Glen Dean Limestone ) 21 350 360 Mts 29 ) Qal Hardinsburg Sandstone and J N Mhg Chesterian ) Golconda Formations h Æ Qal Mav anc 28 27 Br ) N oJ 26 25 JN 85 N ) Cypress Sandstone through J Mcpc Dsl 500 Paint Creek Formation JN N ) J o Mts N 5 J s ) Dgt 600 J N 70 J N Mgd Yankeetown Formation s ) Myr Db 80 28 Æ and Renault Sandstone N J 29 N J N ) Sb J Mgd Mississippian o Dgt Ssc 25 Clines o N 25 Msg 27 ) Qal J 80 s 3 Mav Aux Vases Sandstone N J N Mts o MILL J MISSISSIPPI 34 ) Qal J N ) N J Dsl 35 N 26 J o N 25 J Mgd Mgd ) Msg Ste. Genevieve Limestone 500 o Db DITCH J 20 Mgd N N N ) J J o RIVER o N 600 J 80 N ) 10 o J Mav Æ Msl St. -
Preliminary Geologic Map of the Baird Mountains and Part of the Selawik Quadrangles, Alaska By
preliminary Geologic Map of the Baird Mountains and part of the Selawik Quadrangles, Alaska by S.M. Karl, J.A. Dumoulin, Inyo Ellersieck, A.G. Harris, and J.M. Schmidt Open-File Report 89-551 This map is preliminary and has not been reviewed for conformity with the North American stratigraphic Code. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Table Contents ~ntroduction.......................................... 1 Stratigraphic Framework .................................1 Structural Framework ....................................4 Acknowledgments .......................................6 Unit Descriptions ......................................6 Kc ............................................. 6 KJm .............................................6 JPe .............................................7 ~zb................ '. ... ., ,....................... 8 Mzg ............................................10 MzPzi ..........................................10 MZPZ~.......................................... 11 PMC ............................................12 PD1 ............................................12 Mk0 ............................................12 M1 .............................................13 MDue ...........................................14 Mlt ............................................15 Mk .............................................15 MD1 ............................................16 MDe ............................................16 MD~........................................... -
Analysis of Accumulation Models of Middle Permian in Northwest Sichuan Basin
EARTH SCIENCES RESEARCH JOURNAL GEOLOGY Earth Sci. Res. J. Vol. 24, No. 4 (December, 2020): 419-428 Analysis of accumulation models of middle Permian in Northwest Sichuan Basin Bin Li1,2,*, Qiqi Li3, Wenhua Mei2, Qingong Zhuo4, Xuesong Lu4 1State Key Laboratory of Shale Oil and Gas Enrichment Mechanisms and Effective Development, Wuxi, 214126 2School of Geoscience and Technology, Southwest Petroleum University, Chengdu, 610500 3School of Earth Resources, China University of Geosciences, Wuhan, 430074; 4PetroChina Research Institute of Petroleum Exploration and Development, Beijing 100083, China *Corresponding author: [email protected] ABSTRACT Keywords: Northwest of Sichuan Basin; Great progress has been made in middle Permian exploration in Northwest Sichuan in recent years, but there are still Structure Evolution of Foreland Basin; Middle many questions in understanding the hydrocarbon accumulation conditions. Due to the abundance of source rocks and Permian; Paleozoic; Accumulation conditions; the multi-term tectonic movements in this area, the hydrocarbon accumulation model is relatively complex, which has Accumulation Model. become the main problem to be solved urgently in oil and gas exploration. Based on the different tectonic backgrounds of the middle Permian in northwest Sichuan Basin, the thrust nappe belt, the hidden front belt, and the depression belt are taken as the research units to comb and compare the geologic conditions of the middle Permian reservoir. The evaluation of source rocks and the comparison of hydrocarbon sources suggest that the middle Permian hydrocarbon mainly comes from the bottom of the lower Cambrian and middle Permian, and the foreland orogeny promoted the thermal evolution of Paleozoic source rocks in northwest Sichuan to high maturity and over maturity stage. -
Crossing the Several Scales of Strain-Accomplishing Mechanisms in the Hinterland of the Central Andean Fold±Thrust Belt, Bolivia
Journal of Structural Geology 24 02002) 1587±1602 www.elsevier.com/locate/jstrugeo Crossing the several scales of strain-accomplishing mechanisms in the hinterland of the central Andean fold±thrust belt, Bolivia Nadine McQuarriea,b,*, George H.Davis a aDepartment of Geosciences, University of Arizona, Tucson, AZ 85721, USA bDivision of Geological andPlanetary Science, California Institute of Technology, Pasadena, CA 91125, USA Received 14 November 2000; revised 28 October 2001; accepted 29 October 2001 Abstract Depictions of structures at outcrop, regional and tectonic scales enforce horizontal shortening and vertical thickening as the predominant style of deformation at all scales within the hinterland of the central Andean fold±thrust belt.Outcrop-scale structures document a progression of strain that created: 01) ¯exural-slip folds, 02) fold ¯attening via axial-planar cleavage, 03) vertical stretching via boudinage and late-stage faulting and, ®nally, 04) kink folding.These examples of intraformational deformation are generally concentrated just beyond the tip lines of thrust faults, where fault-propagation folds and related structures are well developed.Fault-propagation folding accommo- dated the accrual of strain indicated by outcrop-scale structures while the structures themselves indicate how deformation developed within each individual fold.Fault-propagation fold geometries at a regional scale emerge from the construction of regional balanced cross-sections. The sections were drawn with careful attention to: 01) known map relationships, -
CONODONTS of the MOJCZA LIMESTONE -.: Palaeontologia Polonica
CONODONTS OF THE MOJCZA LIMESTONE JERZY DZIK Dzik, J. 1994. Conodonts of the M6jcza Limestone. -In: J. Dzik, E. Olemp ska, and A. Pisera 1994. Ordovician carbonate platform ecosystem of the Holy Cross Moun tains. Palaeontologia Polonica 53, 43-128. The Ordovician organodetrital limestones and marls studied in outcrops at M6jcza and Miedzygorz, Holy Cross Mts, Poland, contains a record of the evolution of local conodont faunas from the latest Arenig (Early Kundan, Lenodus variabilis Zone) to the Ashgill (Amorphognathus ordovicicus Zone), with a single larger hiatus corre sponding to the subzones from Eop/acognathus pseudop/anu s to E. reclinatu s. The conodont fauna is Baltic in general appearance but cold water genera , like Sagitto dontina, Scabbardella, and Hamarodus, as well as those of Welsh or Chinese af finities, like Comp/exodus, Phragmodus, and Rhodesognathu s are dominant in par ticular parts of the section while others common in the Baltic region, like Periodon , Eop/acognathus, and Sca/pellodus are extremely rare. Most of the lineages continue to occur throughout most of the section enabling quantitative studies on their phyletic evolut ion. Apparatuses of sixty seven species of thirty six genera are described and illustrated. Phyletic evolution of Ba/toniodus, Amorphognathu s, Comp/exodus, and Pygodus is biometrically documented. Element s of apparatu ses are homolog ized and the standard notation system is applied to all of them. Acodontidae fam. n., Drepa nodus kie/censis sp. n., and D. santacrucensis sp. n. are proposed . Ke y w o r d s: conodonts, Ordovici an, evolut ion, taxonomy. Jerzy Dzik, Instytut Paleobiologii PAN, A/eja Zwirk i i Wigury 93, 02-089 Warszawa , Poland.